WO2009143889A1 - Protection contre l'explosion pour une lampe à haute pression - Google Patents

Protection contre l'explosion pour une lampe à haute pression Download PDF

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Publication number
WO2009143889A1
WO2009143889A1 PCT/EP2008/056598 EP2008056598W WO2009143889A1 WO 2009143889 A1 WO2009143889 A1 WO 2009143889A1 EP 2008056598 W EP2008056598 W EP 2008056598W WO 2009143889 A1 WO2009143889 A1 WO 2009143889A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
lamp
disc element
protective
disc
Prior art date
Application number
PCT/EP2008/056598
Other languages
German (de)
English (en)
Inventor
Josef KRÖLL
Gerald Uhlenberg
Original Assignee
Osram Gesellschaft mit beschränkter Haftung
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 Osram Gesellschaft mit beschränkter Haftung filed Critical Osram Gesellschaft mit beschränkter Haftung
Priority to PCT/EP2008/056598 priority Critical patent/WO2009143889A1/fr
Publication of WO2009143889A1 publication Critical patent/WO2009143889A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken

Definitions

  • the present invention relates to a reflector for a high-pressure lamp, a transparent protective pane for such a reflector and a lamp arrangement with such a reflector and, if appropriate, such a protective pane.
  • High-pressure lamps have a lamp vessel which is filled with a gaseous medium.
  • pressures of typically a few bars to a few hundred bars occur within the lamp vessel.
  • the latter have, for example, a discharge piston with an anode and cathode arranged therein, between which an arc exists during operation via gas discharge.
  • high-pressure discharge lamps for AC operation ie with two identical electrodes and electrodeless discharge lamp, for example with microwave excitation.
  • Many conventional high-pressure lamps also have around the lamp piston around a reflector, one end of which is formed closed and at the other end a light exit opening is provided.
  • the lamp vessel is preferably made of quartz glass or glass ceramic and is designed to withstand the resulting in the piston pressures of more than 200 bar and more. Nevertheless, due to the extreme loads of these lamps, material fatigue can occur, which can lead to an explosive bursting of the lamp vessel. Due to the high pressure prevailing in the lamp vessel, the energy released in the event of a lamp burst is so great that the immediate surroundings are adversely affected by the incident lamp fragments.
  • the reflector can partially intercept the incident lamp fragments in the reverse direction, the lamp fragments can exit unhindered in the direction of the light exit opening.
  • the reflector opening is covered by means of a transparent protective pane.
  • this protective pane can break, so that the immediate environment is endangered not only by the lamp fragments but also by the fractions of the protective pane.
  • the immediate environment may be a projection device or other machine, but it is also possible that people are directly endangered.
  • a reflector for a high-pressure lamp has a protective screen, which a first and a second disc element is formed.
  • the second disk element arranged on the lamp side is designed to absorb a large part of the kinetic energy of a part striking it by way of breakage. Due to the fracture of the second disk element, so much kinetic energy can be converted that the lamp fragments can be trapped by the remaining first disk element.
  • the first disk element thus acts as the actual protective disk, while the second disk element is provided as a sacrificial disk. An exit of lamp fragments from the reflector interior is thus reliably prevented.
  • first and second disc elements may each be connected individually to the reflector, wherein the first and second disc elements may be arranged directly on one another or at a distance from each other.
  • first and second disc element may also be connected to one another via spacers, whereby an air space remains between the disc elements.
  • the reflector can be protected by a protective device.
  • a protective device This can be, for example, a metal grid, which is placed over the reflector or an additional cap, which is adhesively bonded to the reflector.
  • a base receiving the discharge piston has side walls which receive the fractions emitted by the reflector.
  • the side walls may be integrally formed with the base, but it is also possible to form the side walls as a connectable to the base cap, which surrounds the reflector.
  • Fig. 1 A first preferred embodiment of the lamp assembly according to the invention
  • Fig. 2 a second preferred embodiment of the lamp assembly according to the invention
  • Fig. 3 a third preferred embodiment of the lamp assembly according to the invention.
  • Fig. 1 shows a schematic representation of a first preferred embodiment of the lamp assembly according to the invention.
  • a lamp arrangement has a discharge burner 2, which is surrounded by a reflector 4 and is received by a base 6.
  • the discharge burner 2 itself has a discharge vessel or piston 8 filled with a discharge gas, which is hermetically sealed off via two pinch regions 10 and 12.
  • the electrodes 14 are embedded, the free end extends into the piston 8.
  • the electrodes are usually connected via melted Molybdenfo- materials with power supply elements 16, 18, wherein the power supply element 16 electrically contacts the base 6, while the power supply element 18 is electrically connected via a current guide 20 to the reflector 4.
  • an arc 22 is formed between the electrodes via gas discharge, the light of which is emitted by means of the reflector 4 in the direction of a light exit opening 24. It is advantageous if the arc 22 in Focus of the reflector 4 is arranged. In this case, the reflector may preferably have an elliptical, parabolic or other shaped design. At its side facing away from the light exit opening 26, the reflector 4 is connected to the base 6.
  • the light exit opening 24 is completed according to the invention with a protective plate 28 having a first disc member 30 and a second disc member 32.
  • both the first disk element 30 and the second disk element 32 are connected to the reflector 4, an air space 34 remaining between the disk elements.
  • first and second disk element in direct contact with each other stand.
  • the protective pane 28 according to the invention can be formed by adhering the first and second pane elements 30, 32 to one another.
  • first and second disk elements may also have an air gap between them in this case as well.
  • spacers 38 arranged between the first disk element 30 and the second disk element 32 can be provided which are provided with first and second disk elements 30; 32 are connected and hold the disc elements at a defined distance from each other. Also in this case, a connection of only one of the disc elements with the reflector is possible, so that such a trained inventive Permitted protection disk can be easily used in existing lamps.
  • the reflector may be enclosed by an additional element.
  • This may be, for example, a metal grid that is placed over the reflector, or an additional cap that is firmly glued to the reflector.
  • the fixedly connected to the reflector 4 securing devices and the base 6 may have integrally formed or attachable side walls 40, which surround the reflector preferably in the region of the burner all around. These form a fixedly connected to the base cap, which can easily catch any occurring reflector fragments.
  • the protective cap formed in this way also consists of the stable base ceramic.
  • the reflector and protective cap are not directly connected to one another, it can be ensured on the one hand that a breakage of the reflector does not lead to a breakage of the protective cap, and, in addition, it is possible to use materials whose thermal properties may differ from those of the reflector without mechanical damage Tension between the protective cap and the reflector will damage the lamp. As a result, much more stable materials can be used as a protective cap material.
  • a reflector for a high-pressure lamp whose light exit opening is closable with a protective pane, wherein the protective pane has a first and a second pane element, such a protective pane, and a lamp arrangement with such a reflector and such a protective pane.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un réflecteur (4) pour une lampe à haute pression (2), dont l'ouverture de sortie de lumière (24) peut être fermée par un vitrage de protection (28) comportant un premier élément vitre (30) et un second élément vitre (32), un vitrage de protection de ce type, ainsi qu'un ensemble lampe comportant un tel réflecteur et un tel vitrage de protection.
PCT/EP2008/056598 2008-05-29 2008-05-29 Protection contre l'explosion pour une lampe à haute pression WO2009143889A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/056598 WO2009143889A1 (fr) 2008-05-29 2008-05-29 Protection contre l'explosion pour une lampe à haute pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/056598 WO2009143889A1 (fr) 2008-05-29 2008-05-29 Protection contre l'explosion pour une lampe à haute pression

Publications (1)

Publication Number Publication Date
WO2009143889A1 true WO2009143889A1 (fr) 2009-12-03

Family

ID=40280701

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/056598 WO2009143889A1 (fr) 2008-05-29 2008-05-29 Protection contre l'explosion pour une lampe à haute pression

Country Status (1)

Country Link
WO (1) WO2009143889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103292223A (zh) * 2013-06-19 2013-09-11 苏州信亚科技有限公司 揭盖自动断电的大功率led直射灯

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB216116A (en) * 1923-05-17 1925-07-02 Thomas Alva Edison Improvements in electric safety lanterns
US3137804A (en) * 1960-09-30 1964-06-16 Engelhard Hanovia Inc Explosion-proof lamp
EP0431462A2 (fr) * 1989-12-05 1991-06-12 ABBPATENT GmbH Lampe portative
EP1598594A2 (fr) * 2001-08-28 2005-11-23 Nippon Electric Glass Co., Ltd. Reflecteur à faible coût possédant une excellent résistance thermique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB216116A (en) * 1923-05-17 1925-07-02 Thomas Alva Edison Improvements in electric safety lanterns
US3137804A (en) * 1960-09-30 1964-06-16 Engelhard Hanovia Inc Explosion-proof lamp
EP0431462A2 (fr) * 1989-12-05 1991-06-12 ABBPATENT GmbH Lampe portative
EP1598594A2 (fr) * 2001-08-28 2005-11-23 Nippon Electric Glass Co., Ltd. Reflecteur à faible coût possédant une excellent résistance thermique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103292223A (zh) * 2013-06-19 2013-09-11 苏州信亚科技有限公司 揭盖自动断电的大功率led直射灯

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