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EP1527477A1 - Electric light bulb - Google Patents

Electric light bulb

Info

Publication number
EP1527477A1
EP1527477A1 EP03792120A EP03792120A EP1527477A1 EP 1527477 A1 EP1527477 A1 EP 1527477A1 EP 03792120 A EP03792120 A EP 03792120A EP 03792120 A EP03792120 A EP 03792120A EP 1527477 A1 EP1527477 A1 EP 1527477A1
Authority
EP
European Patent Office
Prior art keywords
filament
lamp vessel
envelope
incandescent
lamp
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
EP03792120A
Other languages
German (de)
French (fr)
Other versions
EP1527477B1 (en
Inventor
Axel Bunk
Andreas Nittke
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1527477A1 publication Critical patent/EP1527477A1/en
Application granted granted Critical
Publication of EP1527477B1 publication Critical patent/EP1527477B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Definitions

  • the invention relates to an electric light bulb according to the preamble of patent claim 1.
  • a halogen incandescent lamp in particular a low-voltage halogen incandescent lamp, with a rotationally symmetrical lamp vessel and an incandescent filament arranged therein.
  • the lamp vessel carries an interference filter which reflects the infrared radiation emitted by the incandescent filament back onto the incandescent filament.
  • the US Pat. No. 6,225,731 discloses a halogen incandescent lamp with an axially symmetrical lamp vessel in which a filament is arranged axially.
  • the incandescent filament is surrounded by a translucent and ellipsoid-shaped envelope arranged inside the lamp vessel, which carries an interference filter reflecting infrared rays and is open at both ends.
  • the electric incandescent lamp according to the invention has an essentially axially symmetrical lamp vessel, at least one incandescent filament arranged therein, which has at least one filament section arranged outside the lamp vessel axis, and power supply lines for the at least one incandescent filament.
  • the at least one helical section is arranged axially in a translucent cylindrical sleeve which is provided with an interference filter reflecting infrared rays.
  • the interference filter attached to the translucent cylindrical sheath By means of the interference filter attached to the translucent cylindrical sheath, the infrared radiation emitted by the covered helical section is reflected back onto this helical section and used to heat it up. Corresponding to this heating caused by the infrared radiation, the electrical energy for the incandescent filament can be reduced and thus the luminous efficiency can be increased. In this way, the invention enables the luminous efficiency to be increased independently of the shape of the lamp vessel and the orientation of the incandescent filament within the lamp vessel.
  • the translucent cylindrical shell is advantageously formed as a circular cylindrical tube for manufacturing reasons.
  • This tube can be provided with the interference filter before it is installed and, for example, after Welding the power supplies with the filament are threaded onto the at least one luminous filament section.
  • the circular cylindrical shape of the sheath also favors the focusing of the infrared radiation reflected by the interference filter onto the spiral section arranged in the cylinder axis.
  • the interference filter can advantageously be applied as a coating on the outer or inner lateral surface of the tube. Because of its proximity to the incandescent filament, the envelope is exposed to very high temperatures and is therefore preferably made of tempered glass or quartz glass.
  • the sheath can best be fixed to the lamp vessel or to the incandescent filament.
  • the sheath can be fixed to the lamp vessel particularly advantageously by means of a fusion connection with the lamp vessel.
  • one end of the envelope is preferably melted into a sealed end of the lamp vessel, or inwardly directed knobs in the wall of the lamp vessel are fused to the envelope.
  • the sheath can be fixed to the incandescent filament particularly advantageously by means of at least one pinch of the sheath, which is arranged over a non-illuminating section of the incandescent filament and connected to it.
  • the invention can be used particularly advantageously in the case of a halogen incandescent lamp with an axially symmetrical lamp vessel and a U-shaped or V-shaped incandescent filament arranged therein, the U-legs or N-legs of which each have at least one luminous filament section.
  • a translucent cylindrical sheath is provided, which is provided with an infrared filter reflecting interference filter and in which the luminous filament sections of the respective U-leg or V-leg are axially arranged.
  • the aforementioned translucent cylindrical shells reflect the infrared radiation generated by the luminous filament sections back onto the respective filament sections and, as already explained above, thereby contribute to increasing the luminous efficacy of the lamp. i ⁇ . Description of the preferred embodiments
  • Figure 1 is a side view according to the first embodiment of the invention in a schematic representation
  • Figure 2 The embodiment of the invention shown in Figure 1 in a side view rotated by 90 degrees compared to Figure 1 in a schematic representation
  • Figure 3 is a side view according to the second embodiment of the invention in a schematic representation
  • Figure 4 The exemplary embodiment of the invention shown in Figure 3 in a side view rotated by 90 degrees compared to Figure 3 in a schematic representation
  • All of the exemplary embodiments of the invention are high-voltage halogen incandescent lamps which are provided directly, that is to say without the upstream connection of a voltage converter, for operation on an AC line voltage.
  • the first exemplary embodiment is shown schematically in FIGS. 1 and 2.
  • This lamp has a lamp vessel 1 made of quartz glass or hard glass, which is axially symmetrical with respect to its longitudinal axis A-A.
  • the lamp vessel 1 is closed at one end by means of a pinch seal 10.
  • a U-shaped filament 2 is arranged inside the lamp vessel 1.
  • the two ends 20, 21 of the incandescent filament 2 are each connected to a molybdenum foil 3, 4, which are sealed in the pinch seal 10 in a gas-tight manner.
  • Two power supply wires 5, 6 protrude from the pinch seal 10, each of which is electrically conductively connected to a molybdenum foil 3, 4.
  • the two U-legs of the incandescent filament 2 each have a filament section 22, 23 that lights up during lamp operation. These two filament sections 22, 23 are connected to one another by a curved, non-luminous section 24 of the incandescent filament 2.
  • a curved, non-luminous section 24 of the incandescent filament 2 Arranged within the lamp vessel 1 are two circular-cylindrical quartz glass tubes 7, 8 which carry an interference filter 71, 81 reflecting infrared rays on their outer circumferential surface and each enclose the luminous coil section 22, 23 of a U-leg of the filament 2 without contact.
  • the filament sections 22, 23 are arranged axially in the quartz glass tubes 7, 8 and run approximately parallel to the lamp vessel axis AA.
  • the inside diameter of the quartz glass tubes 7, 8 is selected to be sufficiently large that the halogen cycle process is not impaired by them.
  • the outer diameter of the quartz glass tubes 7, 8 is smaller than the inner radius of the rotationally symmetrical part of the lamp vessel 1.
  • the ends of the quartz glass tubes 7 and 8 are each squeezed 72, 73 and 82, 83 on the non-luminous sections 20, 21, 24 of the filament 2 attached.
  • the above-mentioned bruises are not designed to be gas-tight in order to enable gas exchange with the interior of the lamp vessel and not to impair the halogen cycle process.
  • the quartz glass tubes 7, 8 are each melted with one end 72, 82 in the pinch seal 10 of the lamp vessel 1 for further mechanical stabilization.
  • the incandescent filament 2 is held in the wall of the lamp vessel 1 with the aid of two diametrically arranged funnel-like depressions 14, 15 formed from the material of the lamp vessel 1.
  • the non-luminous section 24 of the incandescent filament is arranged between the two depressions 14, 15 and fixed in this area to the wall of the lamp vessel 1 by means of a fusion connection.
  • This technique of the incandescent filament holder is described for example in the published patent application EP 0 446460 A2.
  • the second exemplary embodiment shown schematically in FIGS. 3 and 4 differs from the first exemplary embodiment described in more detail above only by the quartz glass tubes 7 ′, 8 ′, which are fixed in the lamp vessel 1 in a different way than the quartz glass tubes 7, 8 according to the first exemplary embodiment.
  • the two exemplary embodiments are the same in all other details. Therefore, the same reference numerals have been used in the figures of the two exemplary embodiments for identical parts.
  • the quartz glass tubes 7 ', 8' provided with interference filters IV, 81 ' lie on the inner wall of the lamp vessel
  • the two quartz glass tubes 7 ', 8' are fixed in the wall of the lamp vessel 1 on the lamp vessel 1 with the aid of two diametrically arranged, funnel-shaped depressions 12, 13 extending into the interior of the lamp vessel 1.
  • the funnel-like depressions 12, 13 in the wall of the gas-tight lamp vessel 1 engage like a wedge in the space between the two quartz glass tubes 7 'and 8'.
  • the ends of the quartz glass tubes squeezed over the non-illuminating sections of the incandescent filament can also be sealed gas-tight and a halogen filling can be arranged in the interior of the quartz glass tubes, while no gas filling or only a gas filling without halogen addition is arranged in the interior of the lamp vessel.
  • a halogen filling can be arranged in the interior of the quartz glass tubes, while no gas filling or only a gas filling without halogen addition is arranged in the interior of the lamp vessel.
  • the invention can also be applied to ordinary incandescent lamps without halogen additions.
  • each U-leg or V-leg of the incandescent filament can have a plurality of luminous filament sections which are caused by non-luminous sections of the filament
  • the non-luminous sections of the filament can also be equipped with spacers for centering the luminous filament sections in the quartz glass tubes.
  • a spacer is, for example, a spiral winding made of tungsten, the diameter of which is matched to the inside diameter of the quartz glass tubes and which is fastened to the non-illuminating section of the filament, or inwardly directed knobs in the wall of the quartz glass pipes.
  • the quartz glass tubes can also be fixed in the lamp vessel with the help of a frame-like metal frame.
  • the present invention can also be applied to incandescent lamps which have an incandescent filament oriented transversely to the axis of symmetry or the longitudinal axis of the lamp vessel.
  • the incandescent filament is encased, for example, by a quartz glass tube which carries an interference filter reflecting infrared rays on its outer surface. The ends of this quartz glass tube are attached, for example, to the power supply wires of the filament or to a separate metal frame.
  • Another possibility of fastening the quartz glass tube is to fasten the quartz glass tube to the glow coil by means of spiral-shaped spacers, the diameter of which is adapted to the inside diameter of the quartz glass tube and which are fixed on the filament.
  • Tempered glass tubes for example borosilicate glass tubes, can also be used instead of quartz glass tubes.

Landscapes

  • Resistance Heating (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

An electric light bulb, in particular a halogen light bulb designed to be operated by mains voltage includes a substantially axially symmetrical bulb and a single-coil filament mounted in the bulb. The filament includes at least one incandescent coil section disposed outside the bulb axis. The incandescent coil is disposed axially in a transparent cylindrical sleeve which has an interference filter that reflects infra-red rays.

Description

Elektrische GlühlampeElectric light bulb
Die Erfindung betrifft eine elektrische Glühlampe gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an electric light bulb according to the preamble of patent claim 1.
I. Stand der TechnikI. State of the art
Die gemäß dem internationalen Patentübereinkommen eingereichte Patentanmeldung mit der Neröffentlichungsnummer WO 95/34910 beschreibt eine Halogenglühlampe, insbesondere eine Νiedervolt-Halogenglühlampe, mit einem rotationssymmetrischen Lampengefäß und einer axial darin angeordneten Glühwendel. Um die Effizienz der Halogcnglühlampc zu erhöhen, trägt das Lampengefäß ein Interferenzfilter, das die von der Glühwendel emittierte Infrarotstrahlung auf die Glühvvendel zurück reflektiert.The patent application with the publication number WO 95/34910 filed in accordance with the international patent convention describes a halogen incandescent lamp, in particular a low-voltage halogen incandescent lamp, with a rotationally symmetrical lamp vessel and an incandescent filament arranged therein. In order to increase the efficiency of the halogen incandescent lamp, the lamp vessel carries an interference filter which reflects the infrared radiation emitted by the incandescent filament back onto the incandescent filament.
Die Patentschrift US 6,225,731 offenbart eine Halogenglühlampc mit einem axial- symmctrischcn Lampengefäß, in dem eine Glühwcndel axial angeordnet ist. Die Glühwendcl ist von einer innerhalb des Lampengefäßes angeordneten, lichtdurchlässigen und ellipsoid-förmigen Hülle umgeben, die ein Infrarotstrahlen reflektierendes Interferenzfilter trägt und an den beiden Enden offen ist.The US Pat. No. 6,225,731 discloses a halogen incandescent lamp with an axially symmetrical lamp vessel in which a filament is arranged axially. The incandescent filament is surrounded by a translucent and ellipsoid-shaped envelope arranged inside the lamp vessel, which carries an interference filter reflecting infrared rays and is open at both ends.
Bei Hochvolt-Halogenglühlampen, die unmittelbar an der Νetzwechselspannung betrieben werden, sind die leuchtenden Wendelabschnitte der Glühwendel wegen ihrer relativ großen Abmessungen oftmals außerhalb der Symmetrieachse des Lampengefäßes angeordnet. Die europäischen Offenlegungsschrift EP 0446460 A2 beschreibt beispielsweise eine Hochvolt-Halogenglühlampe mit einer N-förmig oder U- förmig ausgebildeten Glühwendel, die mehrere außerhalb der Lampengefäßachse angeordnete leuchtende Wendelabschnitte aufweist. Mit Hilfe eines auf dem Lampengefäß angebrachten Interferenzfilters gemäß der WO 95/34910 oder einer el- lipsoid-förmigen Hülle gemäß der US 6,225,731 kann bei einer derartigen Hochvolt- Halogenglühlampe keine signifikante Steigerung der Lichtausbeute erreicht werden.In the case of high-voltage halogen incandescent lamps which are operated directly on the AC line voltage, the luminous filament sections of the filament are often arranged outside the axis of symmetry of the lamp vessel because of their relatively large dimensions. European published patent application EP 0446460 A2, for example, describes a high-voltage halogen incandescent lamp with an N-shaped or U-shaped incandescent filament which has a plurality of luminous filament sections arranged outside the lamp vessel axis. With the help of an interference filter according to WO 95/34910 attached to the lamp vessel or an el- Lipoid-shaped envelope according to US Pat. No. 6,225,731, with such a high-voltage halogen incandescent lamp, no significant increase in the luminous efficiency can be achieved.
II. Darstellung der ErfindungII. Presentation of the invention
Es ist die Aufgabe der Erfindung, bei einer elektrischen Glühlampe, insbesondere bei einer Hochvolt-Halogenglühlampe, deren Glühwendel außerhalb der Symmetrieach- se des Lampengefäßes angeordnete Wendelabschnitte aufweist, die Lichtausbeute zu verbessern.It is the object of the invention to improve the luminous efficiency in the case of an electric incandescent lamp, in particular in the case of a high-voltage halogen incandescent lamp whose incandescent filament has filament sections arranged outside the axis of symmetry of the lamp vessel.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Patentansprüchen beschrieben.This object is achieved by the features of claim 1. Particularly advantageous embodiments of the invention are described in the dependent claims.
Die erfindungsgemäße elektrische Glühlampe besitzt ein im wesentlichen axialsymmetrisches Lampengefäß, mindestens eine darin angeordnete Glühwendel, die mindestens einen, außerhalb der Lampengefäßachse angeordneten Wendelabschnitt aufweist, und Stromzuführungen für die mindestens eine Glühwendel. Erfindungsgemäß ist der mindestens eine Wendelabschnitt axial in einer lichtdurchlässigen zylindri- sehen Hülle angeordnet, die mit einem Infrarotstrahlen reflektierenden Interferenzfilter versehen ist.The electric incandescent lamp according to the invention has an essentially axially symmetrical lamp vessel, at least one incandescent filament arranged therein, which has at least one filament section arranged outside the lamp vessel axis, and power supply lines for the at least one incandescent filament. According to the invention, the at least one helical section is arranged axially in a translucent cylindrical sleeve which is provided with an interference filter reflecting infrared rays.
Mittels des auf der lichtdurchlässigen zylindrischen Hülle angebrachten Interferenzfilters wird die von dem umhüllten Wendelabschnitt emittierte Infrarotstrahlung auf diesen Wendelabschnitt zurück reflektiert und zu seiner Aufheizung ausgenutzt. Ent- sprechend dieser durch die Infrarotstrahlung verursachten Aufheizung kann die elektrische Energie für die Glühwendel reduziert und damit die Lichtausbeute gesteigert werden. Die Erfindung ermöglicht auf diese Weise eine Steigerung der Lichtausbeute unabhängig von der Form des Lampengefäßes und der Ausrichtung der Glühwendel innerhalb des Lampengefäßes.By means of the interference filter attached to the translucent cylindrical sheath, the infrared radiation emitted by the covered helical section is reflected back onto this helical section and used to heat it up. Corresponding to this heating caused by the infrared radiation, the electrical energy for the incandescent filament can be reduced and thus the luminous efficiency can be increased. In this way, the invention enables the luminous efficiency to be increased independently of the shape of the lamp vessel and the orientation of the incandescent filament within the lamp vessel.
Die lichtdurchlässige zylindrische Hülle ist aus fertigungstechnischen Gründen vorteilhafterweise als kreiszylindrisches Rohr ausgebildet. Dieses Rohr kann vor seiner Montage mit dem Interferenzfilter versehen werden und beispielsweise nach dem Verschweißen der Stromzuführungen mit der Glühwendel auf den mindestens einen leuchtenden Wendelabschnitt aufgefädelt werden. Die kreiszylindrische Form der Hülle begünstigt ferner die Fokussierung der vom Interferenzfilter reflektierten Infrarotstrahlung auf den in der Zylinderachse angeordneten Wendelabschnitt. Bei Ver- wendung eines kreiszylindrischen Rohres kann das Interferenzfilter in vorteilhafter Weise als Beschichtung auf der äußeren oder inneren Mantelfläche des Rohres aufgebracht werden. Die Hülle ist wegen ihrer Nähe zur Glühwendel sehr hohen Temperaturen ausgesetzt und besteht daher vorzugsweise aus Hartglas oder aus Quarzglas.The translucent cylindrical shell is advantageously formed as a circular cylindrical tube for manufacturing reasons. This tube can be provided with the interference filter before it is installed and, for example, after Welding the power supplies with the filament are threaded onto the at least one luminous filament section. The circular cylindrical shape of the sheath also favors the focusing of the infrared radiation reflected by the interference filter onto the spiral section arranged in the cylinder axis. If a circular cylindrical tube is used, the interference filter can advantageously be applied as a coating on the outer or inner lateral surface of the tube. Because of its proximity to the incandescent filament, the envelope is exposed to very high temperatures and is therefore preferably made of tempered glass or quartz glass.
Die Hülle lässt sich am besten an dem Lampengefäß oder an der Glühwendel fixie- ren. Die Fixierung der Hülle am Lampengefäß kann besonders vorteilhaft mittels einer Schmelzverbindung mit dem Lampengefäß realisiert werden. Vorzugsweise wird hierzu ein Ende der Hülle in einem abgedichteten Ende des Lampengefäßes eingeschmolzen oder es werden nach innen gerichtete Noppen in der Wand des Lampengefäßes mit der Hülle verschmolzen. Die Fixierung der Hülle an der Glüh- wendel kann besonders vorteilhaft mittels mindestens einer Quetschung der Hülle realisiert werden, die über einem nicht-leuchtenden Abschnitt der Glühwendel angeordnet und mit diesem verbunden ist.The sheath can best be fixed to the lamp vessel or to the incandescent filament. The sheath can be fixed to the lamp vessel particularly advantageously by means of a fusion connection with the lamp vessel. For this purpose, one end of the envelope is preferably melted into a sealed end of the lamp vessel, or inwardly directed knobs in the wall of the lamp vessel are fused to the envelope. The sheath can be fixed to the incandescent filament particularly advantageously by means of at least one pinch of the sheath, which is arranged over a non-illuminating section of the incandescent filament and connected to it.
Besonders vorteilhaft kann die Erfindung bei einer Halogenglühlampe mit einem axialsymmetrischen Lampengefäß und einer darin angeordneten U-förmigen oder V- förmigen Glühwendel angewandt werden, deren U-Schenkel bzw. N-Schenkel jeweils mindestens einen leuchtenden Wendelabschnitt aufweisen. Für jeden U- Schenkel bzw. N-Schenkel der Glühwendel ist eine mit einem Infrarotstrahlen reflektierenden Interferenzfilter ausgestattete, lichtdurchlässige zylindrische Hülle vorgesehen, in der die leuchtenden Wendelabschnitte des jeweiligen U-Schenkels bzw. V- Schenkels axial angeordnet sind. Die vorgenannten lichtdurchlässigen zylindrischen Hüllen reflektieren die von den leuchtenden Wendelabschnitten erzeugte Infrarotstrahlung auf die jeweiligen Wendelabschnitte zurück und tragen dadurch wie bereits oben erläutert zur Steigerung der Lichtausbeute der Lampe bei. iπ. Beschreibung der bevorzugten AusführungsbeispieleThe invention can be used particularly advantageously in the case of a halogen incandescent lamp with an axially symmetrical lamp vessel and a U-shaped or V-shaped incandescent filament arranged therein, the U-legs or N-legs of which each have at least one luminous filament section. For each U-leg or N-leg of the incandescent filament, a translucent cylindrical sheath is provided, which is provided with an infrared filter reflecting interference filter and in which the luminous filament sections of the respective U-leg or V-leg are axially arranged. The aforementioned translucent cylindrical shells reflect the infrared radiation generated by the luminous filament sections back onto the respective filament sections and, as already explained above, thereby contribute to increasing the luminous efficacy of the lamp. iπ. Description of the preferred embodiments
Nachstehend wird die Erfindung anhand mehrerer bevorzugter Ausführungsbeispiele näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of several preferred exemplary embodiments. Show it:
Figur 1 Eine Seitenansicht gemäß des ersten Ausführungsbeispiels der Erfindung in schematischer DarstellungFigure 1 is a side view according to the first embodiment of the invention in a schematic representation
Figur 2 Das in Figur 1 abgebildete Ausführungsbeispiel der Erfindung in einer gegenüber der Figur 1 um 90 Grad gedrehten Seitenansicht in schematischer DarstellungFigure 2 The embodiment of the invention shown in Figure 1 in a side view rotated by 90 degrees compared to Figure 1 in a schematic representation
Figur 3 Eine Seitenansicht gemäß des zweiten Ausführungsbeispiels der Erfin- düng in schematischer DarstellungFigure 3 is a side view according to the second embodiment of the invention in a schematic representation
Figur 4 Das in Figur 3 abgebildete Ausfuhrungsbeispiel der Erfindung in einer gegenüber der Figur 3 um 90 Grad gedrehten Seitenansicht in schematischer DarstellungFigure 4 The exemplary embodiment of the invention shown in Figure 3 in a side view rotated by 90 degrees compared to Figure 3 in a schematic representation
Bei allen Ausführungsbeispielen der Erfindung handelt es sich um Hochvolt- Halogcnglühlampcn, die unmittelbar, das heißt ohne die Vorschaltung eines Spannungswandlers, für den Betrieb an Netzwechselspannung vorgesehen sind. In den Figuren 1 und 2 ist das erste Ausführungsbeispiel schematisch dargestellt. Diese Lampe besitzt ein aus Quarzglas oder Hartglas bestehendes Lampengefäß 1 , das axialsymmetrisch bezüglich seiner Längsachse A-A ausgebildet ist. Das Lampengefäß 1 ist an einem Ende mittels einer Quetschdichtung 10 verschlossen. An dem gegenüberliegenden Ende des Lampengefäßes 1 befindet sich ein abgedichteter Pumpstutzen 1 1. Innerhalb des Lampengefäßes 1 ist eine U-förmige Glühwendel 2 angeordnet. Die beiden Enden 20, 21 der Glühwendel 2 sind jeweils mit einer Molybdänfolie 3, 4 verbunden, die gasdicht in der Quetschdichtung 10 eingeschmolzen sind. Aus der Quetschdichtung 10 ragen zwei Stromzuführungsdrähte 5, 6 heraus, die jeweils mit einer Molybdänfolie 3, 4 elektrisch leitend verbunden sind.All of the exemplary embodiments of the invention are high-voltage halogen incandescent lamps which are provided directly, that is to say without the upstream connection of a voltage converter, for operation on an AC line voltage. The first exemplary embodiment is shown schematically in FIGS. 1 and 2. This lamp has a lamp vessel 1 made of quartz glass or hard glass, which is axially symmetrical with respect to its longitudinal axis A-A. The lamp vessel 1 is closed at one end by means of a pinch seal 10. At the opposite end of the lamp vessel 1 there is a sealed pump connector 11. A U-shaped filament 2 is arranged inside the lamp vessel 1. The two ends 20, 21 of the incandescent filament 2 are each connected to a molybdenum foil 3, 4, which are sealed in the pinch seal 10 in a gas-tight manner. Two power supply wires 5, 6 protrude from the pinch seal 10, each of which is electrically conductively connected to a molybdenum foil 3, 4.
Die beiden U-Schenkel der Glühwendel 2 besitzen jeweils einen während des Lampenbetriebs leuchtenden Wendelabschnitt 22, 23. Diese beiden Wendelabschnitte 22, 23 sind durch einen gebogenen, nicht-leuchtenden Abschnitt 24 der Glühwendel 2 miteinander verbunden. Innerhalb des Lampengefäßes 1 sind zwei kreiszylindrische Quarzglasrohre 7, 8 angeordnet, die auf ihrer äußeren Mantelfläche ein Infrarotstrahlen reflektierendes Interferenzfilter 71, 81 tragen und jeweils den leuchtenden Wen- delabschnitt 22, 23 eines U-Schenkels der Glühwendel 2 berührungslos umschließen. Die Wendelabschnitte 22, 23 sind axial in den Quarzglasrohren 7, 8 angeordnet und verlaufen annähernd parallel zu der Lampengefäßachse A-A. Der Innendurchmesser der Quarzglasrohre 7, 8 ist ausreichend groß gewählt, dass der Halogenkreisprozess durch sie nicht beeinträchtigt wird. Der Außendurchmesser der Quarzglasrohre 7, 8 ist kleiner als der Innenradius des rotationssymmetrischen Teils des Lampengefäßes 1. Die Enden der Quarzglasrohre 7 bzw. 8 sind jeweils mittels einer Quetschung 72, 73 bzw. 82, 83 an den nicht-leuchtenden Abschnitten 20, 21, 24 der Glühwendel 2 befestigt. Die vorgenannten Quetschungen sind nicht gasdicht ausgebildet, um einen Gasaustausch mit dem Innenraum des Lampengefäßes zu ermöglichen und den Ha- logenkreisprozess nicht zu beeinträchtigen. Die Quarzglasrohre 7, 8 sind zur weiteren mechanischen Stabilisierung jeweils mit einem Ende 72, 82 in der Quetschdichtung 10 des Lampengefäßes 1 eingeschmolzen. Die Glühwendel 2 wird mit Hilfe von zwei diametral angeordneten, aus dem Material des Lampengefäßes 1 geformten trichterartigen Vertiefungen 14, 15 in der Wand des Lampengefäßes 1 gehaltert. Zu diesem Zweck ist der nicht-leuchtende Abschnitt 24 der Glühwendel zwischen den beiden Vertiefungen 14, 15 angeordnet und in diesem Bereich an der Wand des Lampengefäßes 1 durch eine Schmelzverbindung fixiert. Diese Technik der Glüh- wendelhalterung ist beispielsweise in der Offenlegungsschrift EP 0 446460 A2 beschrieben.The two U-legs of the incandescent filament 2 each have a filament section 22, 23 that lights up during lamp operation. These two filament sections 22, 23 are connected to one another by a curved, non-luminous section 24 of the incandescent filament 2. Arranged within the lamp vessel 1 are two circular-cylindrical quartz glass tubes 7, 8 which carry an interference filter 71, 81 reflecting infrared rays on their outer circumferential surface and each enclose the luminous coil section 22, 23 of a U-leg of the filament 2 without contact. The filament sections 22, 23 are arranged axially in the quartz glass tubes 7, 8 and run approximately parallel to the lamp vessel axis AA. The inside diameter of the quartz glass tubes 7, 8 is selected to be sufficiently large that the halogen cycle process is not impaired by them. The outer diameter of the quartz glass tubes 7, 8 is smaller than the inner radius of the rotationally symmetrical part of the lamp vessel 1. The ends of the quartz glass tubes 7 and 8 are each squeezed 72, 73 and 82, 83 on the non-luminous sections 20, 21, 24 of the filament 2 attached. The above-mentioned bruises are not designed to be gas-tight in order to enable gas exchange with the interior of the lamp vessel and not to impair the halogen cycle process. The quartz glass tubes 7, 8 are each melted with one end 72, 82 in the pinch seal 10 of the lamp vessel 1 for further mechanical stabilization. The incandescent filament 2 is held in the wall of the lamp vessel 1 with the aid of two diametrically arranged funnel-like depressions 14, 15 formed from the material of the lamp vessel 1. For this purpose, the non-luminous section 24 of the incandescent filament is arranged between the two depressions 14, 15 and fixed in this area to the wall of the lamp vessel 1 by means of a fusion connection. This technique of the incandescent filament holder is described for example in the published patent application EP 0 446460 A2.
Das in den Figuren 3 und 4 schematisch dargestellte zweite Ausführungsbeispiel unterscheidet sich von dem oben näher beschriebenen ersten Ausführungsbeispiel nur durch die Quarzglasrohre 7', 8', die auf andere Weise als die Quarzglasrohre 7, 8 gemäß des ersten Ausführungsbeispiels im Lampengefäß 1 fixiert sind. In allen anderen Details stimmen beide Ausführungsbeispiele überein. Daher wurden in den Figu- ren der beiden Ausführungsbeispiele für identische Teile dieselben Bezugszeichen verwendet. Gemäß des zweiten Ausführungsbeispiels der Erfindung liegen die mit Interferenzfiltern IV, 81' versehenen Quarzglasrohre 7', 8' an der Innenwand des LampengefäßesThe second exemplary embodiment shown schematically in FIGS. 3 and 4 differs from the first exemplary embodiment described in more detail above only by the quartz glass tubes 7 ′, 8 ′, which are fixed in the lamp vessel 1 in a different way than the quartz glass tubes 7, 8 according to the first exemplary embodiment. The two exemplary embodiments are the same in all other details. Therefore, the same reference numerals have been used in the figures of the two exemplary embodiments for identical parts. According to the second exemplary embodiment of the invention, the quartz glass tubes 7 ', 8' provided with interference filters IV, 81 'lie on the inner wall of the lamp vessel
1 an und sind jeweils mit einem Ende 72', 82' in der Quetschdichtung 10 des Lampengefäßes 1 eingeschmolzen. Zusätzlich sind die beiden Quarzglasrohre 7', 8' mit Hilfe von zwei diametral angeordneten, trichterförmigen und sich in den Innenraum des Lampengefäßes 1 erstreckenden Vertiefungen 12, 13 in der Wand des Lampengefäßes 1 am Lampengefäß 1 fixiert. Die trichterartigen Vertiefungen 12, 13 in der Wand des gasdicht verschlossenen Lampengefäßes 1 greifen wie ein Keil in den Zwischenraum zwischen den beiden Quarzglasrohren 7' und 8'. Mittels der aus dem Material des Lampengefäßes 1 geformten trichterartigen Vertiefungen 12, 13 werden die Quarzglasrohre 7', 8' vor dem Herstellen der Quetschdichtung 10 an dem Lampengefäß 1 befestigt. Die Quarzglasrohre 7', 8' bilden in dem Bereich der Vertiefungen 12, 13 mit der Wand des Lampengefäßes 1 eine Schmelzverbindung.1 and are each melted with one end 72 ', 82' in the pinch seal 10 of the lamp vessel 1. In addition, the two quartz glass tubes 7 ', 8' are fixed in the wall of the lamp vessel 1 on the lamp vessel 1 with the aid of two diametrically arranged, funnel-shaped depressions 12, 13 extending into the interior of the lamp vessel 1. The funnel-like depressions 12, 13 in the wall of the gas-tight lamp vessel 1 engage like a wedge in the space between the two quartz glass tubes 7 'and 8'. By means of the funnel-like depressions 12, 13 formed from the material of the lamp vessel 1, the quartz glass tubes 7 ′, 8 ′ are fastened to the lamp vessel 1 before the pinch seal 10 is produced. The quartz glass tubes 7 ', 8' form a fused connection in the region of the depressions 12, 13 with the wall of the lamp vessel 1.
Die Erfindung beschränkt sich nicht auf die oben näher erläuterten Ausführungsbei- spielen. Beispielsweise können die über den nicht-leuchtenden Abschnitten der Glühwendel gequetschten Enden der Quarzglasrohrc auch gasdicht verschlossen sein und im Innenraum der Quarzglasrohre eine Halogenfüllung angeordnet sein, während im Innenraum des Lampengefäßes keine Gasfüllung oder nur eine Gasfüllung ohne Halogenzusatz angeordnet ist. Dadurch sind die Interferenzfilter 71 , 81 vor chemischen Angriffen des Halogenzusatzes geschützt. Die Erfindung ist aber auch auf gewöhnliche Glühlampen ohne Halogenzusätze anwendbar.The invention is not limited to the exemplary embodiments explained in more detail above. For example, the ends of the quartz glass tubes squeezed over the non-illuminating sections of the incandescent filament can also be sealed gas-tight and a halogen filling can be arranged in the interior of the quartz glass tubes, while no gas filling or only a gas filling without halogen addition is arranged in the interior of the lamp vessel. This protects the interference filters 71, 81 from chemical attacks by the halogen additive. However, the invention can also be applied to ordinary incandescent lamps without halogen additions.
Ferner kann jeder U-Schenkel bzw. V-Schenkel der Glühwendel mehrere leuchtende Wendelabschnitte aufweisen, die durch nicht-leuchtende Abschnitte der GlühwendelFurthermore, each U-leg or V-leg of the incandescent filament can have a plurality of luminous filament sections which are caused by non-luminous sections of the filament
2 miteinander verbunden sind und ebenfalls axial in dem Quarzglasrohr ausgerichtet sind. Die nicht-leuchtenden Abschnitte der Glühwendel können außerdem mit Abstandshaltern zur Zentrierung der leuchtenden Wendelabschnitte in den Quarzglasrohren ausgestattet sein. Als Abstandshalter eignet sich beispielsweise ein spiralförmiges Gewickel aus Wolfram, dessen Durchmesser auf den Innendurchmesser der Quarzglasrohre abgestimmt ist und das an dem nicht-leuchtenden Abschnitt der Glühwendel befestigt ist, oder nach innen gerichtete Noppen in der Wand der Quarz- glasrohre. Die Quarzglasrohre können aber auch mit Hilfe eines rahmenartigen Metallgestells in dem Lampengefäß fixiert werden.2 are interconnected and are also axially aligned in the quartz glass tube. The non-luminous sections of the filament can also be equipped with spacers for centering the luminous filament sections in the quartz glass tubes. A spacer is, for example, a spiral winding made of tungsten, the diameter of which is matched to the inside diameter of the quartz glass tubes and which is fastened to the non-illuminating section of the filament, or inwardly directed knobs in the wall of the quartz glass pipes. The quartz glass tubes can also be fixed in the lamp vessel with the help of a frame-like metal frame.
Die vorliegende Erfindung kann außerdem auch auf Glühlampen angewandt werden, die eine quer zur Symmetrieachse bzw. Längsachse des Lampengefäßes ausgerichte- ' te Glühwendel aufweisen. In diesem Fall ist die Glühwendel beispielsweise von einem Quarzglasrohr umhüllt, das auf seiner äußeren Mantelfläche ein Infrarotstrahlen reflektierendes Interferenzfilter trägt. Die Enden dieses Quarzglasrohr werden beispielsweise an den Stromzuführungsdrähten der Glühwendel oder an einem separaten Metallgestell befestigt. Eine weitere Befestigungsmöglichkeit des Quarzglasrohres besteht darin, das Quarzglasrohr mittels spiralförmiger Abstandshalter, deren Durchmesser an den Innendurchmesser des Quarzglasrohres angepasst ist und die auf der Glühwendel fixiert sind, an der Glühwendel zu befestigen. Femer können anstelle von Quarzglasrohren auch Hartglasrohre, beispielsweise Borsilikatglasrohre verwendet werden. The present invention can also be applied to incandescent lamps which have an incandescent filament oriented transversely to the axis of symmetry or the longitudinal axis of the lamp vessel. In this case, the incandescent filament is encased, for example, by a quartz glass tube which carries an interference filter reflecting infrared rays on its outer surface. The ends of this quartz glass tube are attached, for example, to the power supply wires of the filament or to a separate metal frame. Another possibility of fastening the quartz glass tube is to fasten the quartz glass tube to the glow coil by means of spiral-shaped spacers, the diameter of which is adapted to the inside diameter of the quartz glass tube and which are fixed on the filament. Tempered glass tubes, for example borosilicate glass tubes, can also be used instead of quartz glass tubes.

Claims

Patentansprüche claims
1. Elektrische Glühlampe mit1. Electric light bulb with
- einem im wesentlichen axialsymmetrischen Lampengefäß (1),- an essentially axially symmetrical lamp vessel (1),
- mindestens einer in dem Lampengefäß (1) angeordneten Glühwendel (2), die mindestens einen, außerhalb der Lampengefäßachse (A-A) angeordne- ten Wendelabschnitt (22, 23) aufweist,- at least one filament (2) arranged in the lamp vessel (1), which has at least one filament section (22, 23) arranged outside the lamp vessel axis (A-A),
- Stromzuführungen (3, 4, 5, 6) für die mindestens eine Glühwendel (2),- Power supply lines (3, 4, 5, 6) for the at least one filament (2),
- einem Infrarotstrahlen reflektierenden Interferenzfilter (71, 81; 71', 81'), dadurch gekennzeichnet, dass- An infrared filter reflecting interference filter (71, 81; 71 ', 81'), characterized in that
- der mindestens eine Wendelabschnitt (22, 23) axial in einer lichtdurchläs- sigen zylindrischen Hülle (7, 8; 7', 8') angeordnet ist, wobei- The at least one spiral section (22, 23) is arranged axially in a translucent cylindrical sheath (7, 8; 7 ', 8'), wherein
- die lichtdurchlässige zylindrische Hülle (7, 8; 7', 8') mit dem Interferenzfilter (71 , 81 ; 71 ', 81 ') versehen ist.- The translucent cylindrical shell (7, 8; 7 ', 8') with the interference filter (71, 81; 71 ', 81') is provided.
2. Elektrische Glühlampe nach Anspruch 1 , dadurch gekennzeichnet, dass die Hülle als kreiszylindrisches Rohr (7, 8; 7', 8') ausgebildet ist.2. Electric incandescent lamp according to claim 1, characterized in that the envelope is designed as a circular cylindrical tube (7, 8; 7 ', 8').
3. Elektrische Glühlampe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Interferenzfilter als Infrarotstrahlen-reflektierende Beschichtung (71 , 81 ) auf der Hülle (7, 8; 7', 8') ausgebildet ist.3. Electric light bulb according to claim 1 or 2, characterized in that the interference filter is designed as an infrared radiation-reflecting coating (71, 81) on the envelope (7, 8; 7 ', 8').
4. Elektrische Glühlampe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Hülle (7, 8; 7', 8') aus Quarzglas besteht.4. Electric light bulb according to claim 1 or 2, characterized in that the envelope (7, 8; 7 ', 8') consists of quartz glass.
5. Elektrische Glühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Hülle (7, 8; 7\ 8') am Lampengefäß (1) fixiert ist.5. Electric incandescent lamp according to claim 1, characterized in that the envelope (7, 8; 7 \ 8 ') on the lamp vessel (1) is fixed.
6. Elektrische Glühlampe nach Anspruch 5, dadurch gekennzeichnet, dass die Hülle (7', 8') durch nach innen gerichtete Noppen (12, 13), die an der Wand des Lampengefäßes angeordnet sind, mit dem Lampengefäß (1) verschmol- zen ist. 6. Electric incandescent lamp according to claim 5, characterized in that the envelope (7 ', 8') fuses with the lamp vessel (1) by inwardly directed knobs (12, 13) which are arranged on the wall of the lamp vessel is.
7. Elektrische Glühlampe nach Anspruch 5, dadurch gekennzeichnet, dass ein -Ende (72, 82; 72', 82') der Hülle (7, 8; 7', 8') in einem abgedichteten Ende7. Electric incandescent lamp according to claim 5, characterized in that an -end (72, 82; 72 ', 82') of the envelope (7, 8; 7 ', 8') in a sealed end
(10) des Lampengefäßes (1) eingeschmolzen ist.(10) of the lamp vessel (1) is melted down.
8. Elektrische Lampe nach Anspruch 1, dadurch gekennzeichnet, dass die Hülle (7, 8) an der Glühwendel (2) fixiert ist.8. Electric lamp according to claim 1, characterized in that the sheath (7, 8) on the filament (2) is fixed.
9. Elektrische Glühlampe nach Anspruch 8, dadurch gekennzeichnet, dass die Hülle (7, 8) mittels mindestens einer Quetschung (72, 73, 82, 83) an mindestens einem nicht-leuchtenden Abschnitt (20, 21, 24) der Glühwendel (2) fixiert ist.9. Electric light bulb according to claim 8, characterized in that the envelope (7, 8) by means of at least one pinch (72, 73, 82, 83) on at least one non-luminous section (20, 21, 24) of the filament (2 ) is fixed.
10. Elektrische Glühlampe nach Anspruch 1, dadurch gekennzeichnet, dass die Glühwendel (2) im wesentlichen U-förmig oder V-förmig ausgebildet ist und jeder U-Schenkel oder V-Schenkel der Glühwendel (2) mindestens einen Wendelabschnitt (22, 23) aufweist, der axial in einer lichtdurchlässigen zylindrischen Hülle (7, 8; 7', 8') angeordnet ist, die mit einem Infrarotstrahlen reflektierenden Interferenzfilter (71 , 81 ; 71 ', 81 ') versehen ist. 10. Electric incandescent lamp according to claim 1, characterized in that the incandescent filament (2) is substantially U-shaped or V-shaped and each U-leg or V-leg of the incandescent filament (2) has at least one filament section (22, 23) which is arranged axially in a translucent cylindrical envelope (7, 8; 7 ', 8') which is provided with an interference filter (71, 81; 71 ', 81') reflecting infrared rays.
EP03792120A 2002-08-08 2003-07-04 Electric light bulb Expired - Lifetime EP1527477B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10236549 2002-08-08
DE10236549A DE10236549A1 (en) 2002-08-08 2002-08-08 Electric light bulb
PCT/DE2003/002248 WO2004019371A1 (en) 2002-08-08 2003-07-04 Electric light bulb

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EP1527477A1 true EP1527477A1 (en) 2005-05-04
EP1527477B1 EP1527477B1 (en) 2006-05-24

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US (1) US7242138B2 (en)
EP (1) EP1527477B1 (en)
JP (1) JP4597674B2 (en)
CN (1) CN100474500C (en)
AT (1) ATE327571T1 (en)
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WO (1) WO2004019371A1 (en)

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EP1527477B1 (en) 2006-05-24
DE10236549A1 (en) 2004-03-04
WO2004019371A1 (en) 2004-03-04
US7242138B2 (en) 2007-07-10
JP4597674B2 (en) 2010-12-15
US20050242733A1 (en) 2005-11-03
ATE327571T1 (en) 2006-06-15
DE50303497D1 (en) 2006-06-29
CN1675741A (en) 2005-09-28
CN100474500C (en) 2009-04-01

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