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EP1527477B1 - Electric light bulb - Google Patents

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Publication number
EP1527477B1
EP1527477B1 EP03792120A EP03792120A EP1527477B1 EP 1527477 B1 EP1527477 B1 EP 1527477B1 EP 03792120 A EP03792120 A EP 03792120A EP 03792120 A EP03792120 A EP 03792120A EP 1527477 B1 EP1527477 B1 EP 1527477B1
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EP
European Patent Office
Prior art keywords
filament
incandescent
sleeve
lamp vessel
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.)
Expired - Lifetime
Application number
EP03792120A
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German (de)
French (fr)
Other versions
EP1527477A1 (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
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Publication of EP1527477A1 publication Critical patent/EP1527477A1/en
Application granted granted Critical
Publication of EP1527477B1 publication Critical patent/EP1527477B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Definitions

  • the invention relates to an electric incandescent lamp 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 disposed axially therein.
  • the lamp vessel carries an interference filter, which reflects the infrared radiation emitted by the incandescent filament back to the incandescent filament.
  • the patent US 6,225,731 discloses a halogen incandescent lamp with an axisymmetric lamp vessel in which an incandescent filament is arranged axially.
  • the incandescent filament is surrounded by a light-transmissive and ellipsoidal-shaped envelope, which is arranged inside the lamp vessel and which carries an infrared-ray-reflecting interference filter and is open at both ends.
  • EP 0 446 460 A2 describes, for example, a high-voltage halogen incandescent lamp with a filament that has a V-shaped or U-shaped design and that has a plurality of luminous filament sections arranged outside the lamp vessel axis.
  • the electric incandescent lamp according to the invention has a substantially axially symmetrical lamp vessel, at least one incandescent filament arranged therein, which has at least one filament section arranged outside the filament vessel axis, and power supply lines for the at least one incandescent filament.
  • the at least one helix section is arranged axially in a light-permeable cylindrical shell, which is provided with an infrared ray-reflecting interference filter.
  • the interference filter mounted on the translucent cylindrical shell By means of the interference filter mounted on the translucent cylindrical shell, the infrared radiation emitted by the enveloped helix section is reflected back onto this helix section and utilized for its heating. According to this heating caused by the infrared radiation, the electrical energy for the filament can be reduced and thus the luminous efficacy can be increased.
  • the invention thus enables an increase in the light output, regardless of the shape of the lamp vessel and the orientation of the 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 before its installation with the interference filter and, for example, after Welding the power supply lines with the filament are threaded onto the at least one luminous filament section.
  • the circular cylindrical shape of the shell further favors the focusing of the reflected infrared radiation from the interference filter on the arranged in the cylinder axis coil section.
  • the interference filter can be applied in an advantageous manner as a coating on the outer or inner circumferential surface of the tube. Because of its proximity to the incandescent filament, the casing is exposed to very high temperatures and therefore preferably consists of hard glass or quartz glass.
  • the shell can best be fixed to the lamp vessel or to the incandescent filament.
  • the fixation of the shell on the lamp vessel can be realized particularly advantageously by means of a fusion connection with the lamp vessel.
  • one end of the shell is sealed in a sealed end of the lamp vessel or inwardly directed nubs are fused in the wall of the lamp vessel with the shell.
  • the fixation of the casing on the incandescent filament can be realized particularly advantageously by means of at least one crushing of the casing, which is arranged above a non-luminous section of the incandescent filament and connected thereto.
  • the invention can be applied to a halogen incandescent lamp having an axially symmetrical lamp vessel and a U-shaped or V-shaped filament disposed therein, whose U-legs or V-legs each have at least one luminous filament section.
  • a halogen incandescent lamp having an axially symmetrical lamp vessel and a U-shaped or V-shaped filament disposed therein, whose U-legs or V-legs each have at least one luminous filament section.
  • a equipped with an infrared rays interference filter equipped, translucent cylindrical shell is provided in which the luminous filament sections of the respective U-leg or V-leg are arranged axially.
  • the above translucent cylindrical casings reflect the infrared radiation generated by the luminous filament sections back to the respective filament sections and thereby contribute, as already explained above, to an increase in the luminous efficacy of the lamp.
  • the first embodiment is shown schematically.
  • This lamp has a quartz glass or hard glass existing lamp vessel 1, which is formed 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 sealed pump neck 11 At the opposite end of the lamp vessel 1 is a sealed pump neck 11.
  • a U-shaped filament 2 is arranged within the lamp vessel 1, .
  • the two ends 20, 21 of the filament 2 are each connected to a molybdenum foil 3, 4, which are sealed gastight in the pinch seal 10.
  • From the pinch seal 10 protrude two power supply wires 5, 6, which are each electrically connected to a molybdenum foil 3, 4.
  • the two U-limbs of the incandescent filament 2 each have a filament section 22, 23 which illuminates during lamp operation. These two filament sections 22, 23 are connected by a curved, non-luminous portion 24 of the filament 2 with each other.
  • two circular-cylindrical quartz glass tubes 7, 8 are arranged, which carry on their outer surface an infrared ray-reflecting interference filter 71, 81 and each enclose the luminous coil portion 22, 23 of a U-leg of the filament 2 without contact.
  • the helical sections 22, 23 are arranged axially in the quartz glass tubes 7, 8 and extend approximately parallel to the lamp vessel axis AA.
  • the inner diameter of the quartz glass tubes 7, 8 is chosen sufficiently large that the halogen cycle process is not affected 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 by means of a pinch 72 and 82 at the non-luminous portions 20, 21, 24 of the filament. 2 attached.
  • the abovementioned bruises are not gas-tight in order to allow gas exchange with the interior of the lamp vessel and not to impair the halogen cycle process.
  • the quartz glass tubes 7, 8 are fused for further mechanical stabilization in each case with one end 72, 82 in the pinch seal 10 of the lamp vessel 1.
  • the filament 2 is held in the wall of the lamp vessel 1 by means of two diametrically arranged funnel-like depressions 14, 15 formed from the material of the lamp vessel 1.
  • the non-luminous portion 24 of the filament is disposed between the two recesses 14, 15 and fixed in this area on the wall of the lamp vessel 1 by a fusion bond.
  • This technique of incandescent filament mounting is described, for example, in the published patent application EP 0 446 460 A2.
  • the second embodiment shown schematically in Figures 3 and 4 differs from the first embodiment described in more detail only by the quartz glass tubes 7, 8, which are fixed in other ways than the quartz glass tubes 7. 8 according to the first embodiment in the lamp vessel 1. In all other details, both embodiments are the same. Therefore, the same reference numerals have been used in the figures of the two embodiments for identical parts.
  • the quartz glass tubes 7, 8 provided with interference filters 71, 81 rest on the inner wall of the lamp vessel 1 and are respectively fused with one end 72, 82 in the pinch seal 10 of the lamp vessel 1.
  • the two quartz glass tubes 7, 8 are fixed in the wall of the lamp vessel 1 on the lamp vessel 1 by means 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-tightly closed Lampengeflißes 1 engage like a wedge in the space between the two quartz glass tubes 7 and 8.
  • the quartz glass tubes 7, 8 By means of the formed from the material of the lamp vessel 1 funnel-like depressions 12, 13, the quartz glass tubes 7, 8 before the manufacture of the pinch seal 10 attached to the lamp vessel 1.
  • the quartz glass tubes 7, 8 form in the region of the recesses 12, 13 with the wall of the lamp vessel 1 a fusion bond.
  • the over the non-luminous portions of the filament squeezed ends of the quartz glass tubes may also be closed gas-tight and be arranged in the interior of the quartz glass tubes a halogen filling, while in the interior of the lamp vessel no gas filling or only a gas filling is arranged without addition of halogen.
  • the interference filters 71, 81 are protected against chemical attack of the halogen additive.
  • the invention is also applicable to ordinary incandescent lamps without halogen additives.
  • each U leg or V leg of the incandescent filament can have a plurality of luminous filament sections, which are connected to one another by non-luminous sections of the incandescent filament 2 and are likewise aligned axially in the quartz glass tube.
  • the non-luminous sections of the incandescent filament can also be equipped with spacers for centering the luminous filament sections in the quartz glass tubes.
  • spacer for example, a spiral tungsten charge is suitable, whose diameter is matched to the inner diameter of the quartz glass tubes and which is attached to the non-luminous portion of the filament, or inwardly directed nubs in the wall of the quartz glass tubes.
  • the quartz glass tubes can also be fixed in the lamp vessel by means of a frame-like metal frame.
  • the present invention can also be applied to incandescent lamps which have a filament aligned transversely to the axis of symmetry or the longitudinal axis of the lamp vessel.
  • the incandescent filament is enveloped, for example, by a quartz glass tube which carries on its outer circumferential surface an infrared ray-reflecting interference filter. 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 for fixing the quartz glass tube is to fasten the quartz glass tube to the incandescent filament by means of spiral spacers whose diameter is matched to the inner diameter of the quartz glass tube and which are fixed on the incandescent filament.
  • quartz glass tubes it is also possible to use hard glass tubes, for example borosilicate 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

Die Erfindung betrifft eine elektrische Glühlampe gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an electric incandescent lamp according to the preamble of patent claim 1.

I. Stand der Technik I. State of the art

Die gemäß dem internationalen Patentübereiakommen eingereichte Patentanmeldung mit der Veröffentlichungsnummer WO 95/34910 beschreibt eine Halogenglühlampe, insbesondere eine Niedervolt-Halogenglühlampe, mit einem rotationssymmetrischen Lampengefäß und einer axial darin angeordneten Glühwendel. Um die Effizienz der Halogenglühlampe zu erhöhen, trägt das Lampengefäß ein Interferenzfilter, das die von der Glühwendel emittierte Infrarotstrahlung auf die Glühwendel zurück reflektiert.The patent application with the publication number WO 95/34910 filed in accordance with the international patent application describes a halogen incandescent lamp, in particular a low-voltage halogen incandescent lamp, with a rotationally symmetrical lamp vessel and an incandescent filament disposed axially 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 to the incandescent filament.

Die Patentschrift US 4,517,491 beschreibt eine Glühlampe mit einer parallel zur Lampenlängsachse versetzten Glühwendel, die von einer zylindrischen Hülle umgeben ist, wobei die Hülle mit einem Infrarotstrahlen reflektierenden Interferenzfilter versehen ist.The patent US Pat. No. 4,517,491 describes an incandescent lamp with an incandescent filament, which is offset parallel to the lamp longitudinal axis, and which is surrounded by a cylindrical envelope, the envelope being provided with an interference filter reflecting infrared rays.

Die Patentschrift US 6,225,731 offenbart eine Halogenglühlampe mit einem axialsymmetrischen Lampengefäß, in dem eine Glühwendel axial angeordnet ist. Die Glühwendel ist von einer innerhalb des Lampengefäßes angeordneten, lichtdurchlässigen und ellipsoid-formigen Hülle umgeben, die ein Infrarotstrahlen reflektierendes Interferenzfilter trägt und an den beiden Enden offen ist.The patent US 6,225,731 discloses a halogen incandescent lamp with an axisymmetric lamp vessel in which an incandescent filament is arranged axially. The incandescent filament is surrounded by a light-transmissive and ellipsoidal-shaped envelope, which is arranged inside the lamp vessel and which carries an infrared-ray-reflecting interference filter and is open at both ends.

Bei Hochvolt-Halogenglühlampen, die unmittelbar an der Netzwechselspannung betrieben werden, sind die leuchtenden Wendelabschnitte der Glühwendel wegen ihrer relativ großen Abmessungen oftmals außerhalb der Symmetrieachse des Lampengefäßes angeordnet. Die europäischen Offenlegungsschrift EP 0 446 460 A2 beschreibt beispielsweise eine Hochvolt-Halogenglühlampe mit einer V-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 ellipsoid-förmigen Hülle gemäß der US 6,225,731 kann bei einer derartigen Hochvolt-Halogenglühlampe keine signifikante Steigerung der Lichtausbeute erreicht werden.In high-voltage halogen incandescent lamps, which are operated directly on the mains AC voltage, the luminous filament sections of the filament are often arranged outside of the axis of symmetry of the lamp vessel because of their relatively large dimensions. European published patent application EP 0 446 460 A2 describes, for example, a high-voltage halogen incandescent lamp with a filament that has a V-shaped or U-shaped design and that has a plurality of luminous filament sections arranged outside the lamp vessel axis. With the help of a mounted on the lamp vessel interference filter according to WO 95/34910 or an ellipsoidal-shaped Shell according to US 6,225,731 can be achieved in such a high-voltage halogen incandescent lamp, no significant increase in the luminous efficacy.

II. Darstellung der Erfindung II. Presentation of the invention

Es ist die Aufgabe der Erfindung, bei einer elektrischen Glühlampe, insbesondere bei einer Hochvolt-Halogenglühlampe, deren Glühwendel außerhalb der Symmetrieachse des Lampengefäßes angeordnete Wendelabschnitte aufweist, die Lichtausbeute zu verbessern.It is the object of the invention, in an electric incandescent lamp, in particular in a high-voltage halogen incandescent lamp whose filament outside the axis of symmetry of the lamp vessel arranged coil sections, to improve the light output.

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 zylindrischen Hülle angeordnet, die mit einem Infrarotstrahlen reflektierenden Interferenzfilter versehen ist.The electric incandescent lamp according to the invention has a substantially axially symmetrical lamp vessel, at least one incandescent filament arranged therein, which has at least one filament section arranged outside the filament vessel axis, and power supply lines for the at least one incandescent filament. According to the invention, the at least one helix section is arranged axially in a light-permeable cylindrical shell, which is provided with an infrared ray-reflecting interference filter.

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. Entsprechend 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 mounted on the translucent cylindrical shell, the infrared radiation emitted by the enveloped helix section is reflected back onto this helix section and utilized for its heating. According to this heating caused by the infrared radiation, the electrical energy for the filament can be reduced and thus the luminous efficacy can be increased. The invention thus enables an increase in the light output, regardless of the shape of the lamp vessel and the orientation of the 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 Verwendung 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 before its installation with the interference filter and, for example, after Welding the power supply lines with the filament are threaded onto the at least one luminous filament section. The circular cylindrical shape of the shell further favors the focusing of the reflected infrared radiation from the interference filter on the arranged in the cylinder axis coil section. When using a circular cylindrical tube, the interference filter can be applied in an advantageous manner as a coating on the outer or inner circumferential surface of the tube. Because of its proximity to the incandescent filament, the casing is exposed to very high temperatures and therefore preferably consists of hard glass or quartz glass.

Die Hülle lässt sich am besten an dem Lampengefäß oder an der Glühwendel fixieren. 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 Glühwendel 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 shell can best be fixed to the lamp vessel or to the incandescent filament. The fixation of the shell on the lamp vessel can be realized particularly advantageously by means of a fusion connection with the lamp vessel. Preferably, for this purpose, one end of the shell is sealed in a sealed end of the lamp vessel or inwardly directed nubs are fused in the wall of the lamp vessel with the shell. The fixation of the casing on the incandescent filament can be realized particularly advantageously by means of at least one crushing of the casing, which is arranged above a non-luminous section of the incandescent filament and connected thereto.

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. V-Schenkel jeweils mindestens einen leuchtenden Wendelabschnitt aufweisen. Für jeden U-Schenkel bzw. V-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.Particularly advantageously, the invention can be applied to a halogen incandescent lamp having an axially symmetrical lamp vessel and a U-shaped or V-shaped filament disposed therein, whose U-legs or V-legs each have at least one luminous filament section. For each U-leg or V-leg of the filament a equipped with an infrared rays interference filter equipped, translucent cylindrical shell is provided in which the luminous filament sections of the respective U-leg or V-leg are arranged axially. The above translucent cylindrical casings reflect the infrared radiation generated by the luminous filament sections back to the respective filament sections and thereby contribute, as already explained above, to an increase in the luminous efficacy of the lamp.

III. Beschreibung der bevorzugten Ausführungsbeispiele III. Description of the preferred embodiments

Nachstehend wird die Erfindung anhand mehrerer bevorzugter Ausführungsbeispiele näher erläutert. Es zeigen:

Figur 1
Eine Seitenansicht gemäß des ersten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Figur 2
Das in Figur 1 abgebildete Ausführungsbeispiel der Erfindung in einer gegenüber der Figur 1 um 90 Grad gedrehten Seitenansicht in schematischer Darstellung
Figur 3
Eine Seitenansicht gemäß des zweiten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Figur 4
Das in Figur 3 abgebildete Ausführungsbeispiel der Erfindung in einer gegenüber der Figur 3 um 90 Grad gedrehten Seitenansicht in schematischer Darstellung
The invention will be explained in more detail with reference to several preferred embodiments. Show it:
FIG. 1
A side view according to the first embodiment of the invention in a schematic representation
FIG. 2
The illustrated in Figure 1 embodiment of the invention in a relation to Figure 1 rotated by 90 degrees side view in a schematic representation
FIG. 3
A side view according to the second embodiment of the invention in a schematic representation
FIG. 4
The illustrated in Figure 3 embodiment of the invention in a relation to Figure 3 rotated by 90 degrees side view in a schematic representation

Bei allen Ausführungsbeispielen der Erfindung handelt es sich um Hochvolt-Halogenglühlampen, 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 11. 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.In all embodiments of the invention are high-voltage halogen incandescent lamps, which are provided directly, ie without the upstream of a voltage converter, for operation on mains AC voltage. In the figures 1 and 2, the first embodiment is shown schematically. This lamp has a quartz glass or hard glass existing lamp vessel 1, which is formed 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 is a sealed pump neck 11. Within the lamp vessel 1, a U-shaped filament 2 is arranged. The two ends 20, 21 of the filament 2 are each connected to a molybdenum foil 3, 4, which are sealed gastight in the pinch seal 10. From the pinch seal 10 protrude two power supply wires 5, 6, which are each electrically 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 Wendelabschnitt 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 bzw. 82 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 Halogenkreisprozess 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 Glühwendelhalterung ist beispielsweise in der Offenlegungsschrift EP 0 446 460 A2 beschrieben.The two U-limbs of the incandescent filament 2 each have a filament section 22, 23 which illuminates during lamp operation. These two filament sections 22, 23 are connected by a curved, non-luminous portion 24 of the filament 2 with each other. Within the lamp vessel 1, two circular-cylindrical quartz glass tubes 7, 8 are arranged, which carry on their outer surface an infrared ray-reflecting interference filter 71, 81 and each enclose the luminous coil portion 22, 23 of a U-leg of the filament 2 without contact. The helical sections 22, 23 are arranged axially in the quartz glass tubes 7, 8 and extend approximately parallel to the lamp vessel axis AA. The inner diameter of the quartz glass tubes 7, 8 is chosen sufficiently large that the halogen cycle process is not affected 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 by means of a pinch 72 and 82 at the non-luminous portions 20, 21, 24 of the filament. 2 attached. The abovementioned bruises are not gas-tight in order to allow gas exchange with the interior of the lamp vessel and not to impair the halogen cycle process. The quartz glass tubes 7, 8 are fused for further mechanical stabilization in each case with one end 72, 82 in the pinch seal 10 of the lamp vessel 1. The filament 2 is held in the wall of the lamp vessel 1 by means of two diametrically arranged funnel-like depressions 14, 15 formed from the material of the lamp vessel 1. For this purpose, the non-luminous portion 24 of the filament is disposed between the two recesses 14, 15 and fixed in this area on the wall of the lamp vessel 1 by a fusion bond. This technique of incandescent filament mounting is described, for example, in the published patent application EP 0 446 460 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 Figuren der beiden Ausführungsbeispiele für identische Teile dieselben Bezugszeichen verwendet.The second embodiment shown schematically in Figures 3 and 4 differs from the first embodiment described in more detail only by the quartz glass tubes 7, 8, which are fixed in other ways than the quartz glass tubes 7. 8 according to the first embodiment in the lamp vessel 1. In all other details, both embodiments are the same. Therefore, the same reference numerals have been used in the figures of the two embodiments for identical parts.

Gemäß des zweiten Ausführungsbeispiels der Erfindung liegen die mit Interferenzfiltem 71, 81 versehenen Quarzglasrohre 7, 8 an der Innenwand des Lampengefäßes 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 Lampengeflißes 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.According to the second exemplary embodiment of the invention, the quartz glass tubes 7, 8 provided with interference filters 71, 81 rest on the inner wall of the lamp vessel 1 and are respectively fused 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 by means 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-tightly closed Lampengeflißes 1 engage like a wedge in the space between the two quartz glass tubes 7 and 8. By means of the formed from the material of the lamp vessel 1 funnel-like depressions 12, 13, the quartz glass tubes 7, 8 before the manufacture of the pinch seal 10 attached to the lamp vessel 1. The quartz glass tubes 7, 8 form in the region of the recesses 12, 13 with the wall of the lamp vessel 1 a fusion bond.

Die Erfindung beschränkt sich nicht auf die oben näher erläuterten Ausführungsbeispielen. Beispielsweise können die über den nicht-leuchtenden Abschnitten der Glühwendel gequetschten Enden der Quarzglasrohre 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 embodiments explained in detail above. For example, the over the non-luminous portions of the filament squeezed ends of the quartz glass tubes may also be closed gas-tight and be arranged in the interior of the quartz glass tubes a halogen filling, while in the interior of the lamp vessel no gas filling or only a gas filling is arranged without addition of halogen. As a result, the interference filters 71, 81 are protected against chemical attack of the halogen additive. The invention is also applicable to ordinary incandescent lamps without halogen additives.

Ferner kann jeder U-Schenkel bzw. V-Schenkel der Glühwendel mehrere leuchtende Wendelabschnitte aufweisen, die durch nicht-leuchtende Abschnitte der Glühwendel 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 Glahwendel befestigt ist, oder nach innen gerichtete Noppen in der Wand der Quarzglasrohre. Die Quarzglasrohre können aber auch mit Hilfe eines rahmenartigen Metallgestells in dem Lampengefäß fixiert werden.Furthermore, each U leg or V leg of the incandescent filament can have a plurality of luminous filament sections, which are connected to one another by non-luminous sections of the incandescent filament 2 and are likewise aligned axially in the quartz glass tube. The non-luminous sections of the incandescent filament can also be equipped with spacers for centering the luminous filament sections in the quartz glass tubes. As a spacer, for example, a spiral tungsten charge is suitable, whose diameter is matched to the inner diameter of the quartz glass tubes and which is attached to the non-luminous portion of the filament, or inwardly directed nubs in the wall of the quartz glass tubes. However, the quartz glass tubes can also be fixed in the lamp vessel by means 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 ausgerichtete 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. Ferner können anstelle von Quarzglasrohren auch Hartglasrohre, beispielsweise Borsilikatglasrohre verwendet werden.The present invention can also be applied to incandescent lamps which have a filament aligned transversely to the axis of symmetry or the longitudinal axis of the lamp vessel. In this case, the incandescent filament is enveloped, for example, by a quartz glass tube which carries on its outer circumferential surface an infrared ray-reflecting interference filter. 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 for fixing the quartz glass tube is to fasten the quartz glass tube to the incandescent filament by means of spiral spacers whose diameter is matched to the inner diameter of the quartz glass tube and which are fixed on the incandescent filament. Furthermore, instead of quartz glass tubes, it is also possible to use hard glass tubes, for example borosilicate glass tubes.

Claims (8)

  1. Electric incandescent lamp having
    - a substantially axially symmetrical lamp vessel (1),
    - at least one incandescent filament (2) that is arranged in the lamp vessel (1) and has at least one filament section (22, 23) arranged outside the lamp vessel axis (A-A),
    - supply leads (3, 4, 5, 6) for the at least one incandescent filament (2),
    - the at least one filament section (22, 23) is arranged axially in a transparent cylindrical sleeve (7, 8),
    - the transparent cylindrical sleeve (7, 8) being provided with an interference filter (71, 81) which reflects infrared rays, characterized in that
    - the transparent cylindrical sleeve (7, 8) is fixed on the at least one incandescent filament (2) or/and one end (72, 82) of the transparent cylindrical sleeve (7, 8) is sealed in a sealed end (10) of the lamp vessel (1).
  2. Electric incandescent lamp according to Claim 1, characterized in that the sleeve takes the form of a circularly cylindrical tube (7, 8).
  3. Electric incandescent lamp according to Claim 1 or 2, characterized in that the interference filter takes the form of a coating (71, 81) on the sleeve (7, 8) which reflects infrared rays.
  4. Electric incandescent lamp according to Claim 1 or 2, characterized in that the sleeve (7, 8) consists of silica glass.
  5. Electric incandescent lamp according to Claim 1, characterized in that the sleeve (7, 8) is fused with the lamp vessel (1) by inwardly directed knobs (12, 13) that are arranged on the wall of the lamp vessel (1).
  6. Electric incandescent lamp according to Claim 1, characterized in that the sleeve (7, 8) is fixed on at least one non-luminous section (20, 21, 24) of the incandescent filament (2) by means of at least one pinch (72, 82).
  7. Electric incandescent lamp according to Claim 1, characterized in that the sleeve (7, 8) is fastened on the incandescent filament (2) by means of spiral spacers whose diameter is adapted to the inside diameter of the sleeve (7, 8) and which are fixed on the incandescent filament (2).
  8. Electric incandescent lamp according to Claim 1, characterized in that the incandescent filament (2) is substantially in the form of a U or V, and each U-limb or V-limb of the incandescent filament (2) has at least one filament section (22, 23) that is arranged axially in a transparent cylindrical sleeve (7, 8) that is provided with an interference filter (71, 81) which reflects 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

Publications (2)

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

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Application Number Title Priority Date Filing Date
EP03792120A Expired - Lifetime EP1527477B1 (en) 2002-08-08 2003-07-04 Electric light bulb

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US (1) US7242138B2 (en)
EP (1) EP1527477B1 (en)
JP (1) JP4597674B2 (en)
CN (1) CN100474500C (en)
AT (1) ATE327571T1 (en)
DE (2) DE10236549A1 (en)
WO (1) WO2004019371A1 (en)

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WO2008004540A1 (en) * 2006-07-03 2008-01-10 Panasonic Corporation Bulb, bulb with reflector, and illumination device
JP2008016206A (en) * 2006-07-03 2008-01-24 Matsushita Electric Ind Co Ltd Bulb, bulb with reflecting mirror, and lighting system
WO2008050253A2 (en) 2006-10-24 2008-05-02 Philips Intellectual Property & Standards Gmbh Electric incandescent lamp with filament array and infrared reflective coating
WO2008116493A1 (en) * 2007-03-23 2008-10-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Filament lamp with a coiled filament with encased end
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DE10236549A1 (en) 2004-03-04
ATE327571T1 (en) 2006-06-15
JP4597674B2 (en) 2010-12-15
CN1675741A (en) 2005-09-28
US20050242733A1 (en) 2005-11-03
WO2004019371A1 (en) 2004-03-04
US7242138B2 (en) 2007-07-10
EP1527477A1 (en) 2005-05-04
DE50303497D1 (en) 2006-06-29
JP2005535101A (en) 2005-11-17
CN100474500C (en) 2009-04-01

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