EP0258829A2 - Lampe à décharge à haute pression et méthode pour la faire fonctionner - Google Patents

Lampe à décharge à haute pression et méthode pour la faire fonctionner Download PDF

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Publication number
EP0258829A2
EP0258829A2 EP87112507A EP87112507A EP0258829A2 EP 0258829 A2 EP0258829 A2 EP 0258829A2 EP 87112507 A EP87112507 A EP 87112507A EP 87112507 A EP87112507 A EP 87112507A EP 0258829 A2 EP0258829 A2 EP 0258829A2
Authority
EP
European Patent Office
Prior art keywords
lamp
heating
heating wire
pressure discharge
discharge vessel
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.)
Withdrawn
Application number
EP87112507A
Other languages
German (de)
English (en)
Other versions
EP0258829A3 (fr
Inventor
Alexander Dobrusskin
Jürgen Dr. Heider
Wolfgang Schade
Jürgen Dr. vom Scheidt
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
Priority claimed from DE19863630338 external-priority patent/DE3630338A1/de
Priority claimed from DE19863630335 external-priority patent/DE3630335A1/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0258829A2 publication Critical patent/EP0258829A2/fr
Publication of EP0258829A3 publication Critical patent/EP0258829A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • GB-PS 573 141 describes a high-pressure discharge lamp with two seals, which is intended for operation in an optical system.
  • a heating wire with ten turns is spirally wound around one of the two melts, which keeps the discharge vessel almost at operating temperature when current is passed, thereby keeping the filling substances in a gaseous state. After switching on the lamp, it reaches its full luminous flux after about three seconds. Since the heating wire is wrapped around the melting point without additional fastening means, it can easily slip, which would impair the operational safety of the lamp.
  • a high-pressure discharge lamp with two melts in which a heating coil is arranged around part of the discharge vessel, which is guided in a capillary made of quartz glass connected to the discharge vessel. With this separately heated heating filament, the filling substances in the discharge vessel are evaporated, so that the start-up time of the lamp is reduced until the full luminous flux is reached.
  • the present invention has for its object to arrange the heating wire on the lamp directly and in such a way that it can be assembled on the one hand without great effort and on the other hand is immovably held at its predetermined location in intimate thermal contact with the lamp.
  • High-pressure discharge lamps in particular those with a metal halide filling, have recently been used increasingly for the purpose of general lighting. Furthermore, such lamps have also been proposed for the headlights of motor vehicles. Small power levels of less than 100 W, in particular also below 50 W, are used for both purposes. In addition, there is an increased need for a high level of comfort with regard to the color properties and the rapid start-up of such lamps for both applications. These requirements are largely met with the specific filling substances and a preheating of the discharge vessel known per se. With the design and fixation of the heating device on the lamp according to the invention, the above-described object is achieved.
  • the arrangement of the heating wire within a multiple capillary which in turn is in thermal contact with the lamp via the putty, ensures a high heat concentration in the area where heat is required, while the leads guided in the double capillary remain cold. Furthermore, the heating wire in the multiple capillary has the possibility of being able to carry out thermal changes in length unhindered.
  • Both the double capillary and the multiple capillary are commercially available ceramic bulk articles, which also protect the heating wire against oxidation. For the evaporation of the filling substances, it is completely sufficient if such a multiple capillary is attached to only two opposite sides of the lamp pinch.
  • the heating winding 8 is fixed to the lamp 1 by means of a non-evaporating, inorganic cement 10 (for example Cerastil®, also referred to as C3).
  • the putty 10 also acts as an electrical insulator against a possible short circuit of the heating winding 8.
  • the heating winding 8 consists of a resistance wire (eg Kantal®) and is operated at a voltage of 12 V with a current of approximately 1.5 A. In this way, a temperature of approximately 600 ° C. can be reached at the discharge vessel 2, which is sufficient for the lamp 1 to start up quickly.
  • the metal halide high-pressure discharge lamp 11 in FIG. 3 has an elongated discharge vessel 12 made of quartz, on the opposite sides of which the melts 13 extend in the form of a pinch.
  • a sealing film 14 made of molybdenum is arranged in each melt 13 and is connected to an outer power supply 15 and an inner power supply 16.
  • the inner power supply lines 16 project into the discharge space and are each provided with a spherical electrode 17 at their ends.
  • There is one on each part of each melt 13 adjacent to the discharge vessel 12 four turns heating coil 18 made of a resistance wire (eg Kanthal®) applied, which are electrically connected in series with each other via the lamp holder (not shown).
  • the respective ends 19 are located on the part of the melts 13 facing away from the discharge vessel 12.
  • the heating winding 18 is fixed to the lamp 11 by means of an overlay layer made of silicon dioxide 20, which is applied, for example, by plasma spraying. At the same time, the silicon dioxide 20 acts as an electrical insulator against a possible short circuit of the heating
  • the high-pressure discharge lamp according to FIG. 3 has an electrical power of approx. 35 W in the burned-in state and is operated at a burning voltage of approx. 100 V with a current of approx. 0.35 A.
  • the lamp contains the halides of sodium and scandium.
  • the burned-in lamp also has a luminous flux of more than 2700 lm and a color temperature of approx. 3400 K.
  • the graph in FIG. 4 shows the course of the burn-in curves of a metal halide high-pressure discharge lamp in accordance with FIG. 3 once without preheating (dash-dotted line) and once with preheating according to the invention (solid line) and the course of a conventional H4 light bulb for car headlights (dashed line).
  • the H4 lamp supplies only about 30% of the luminous flux of the metal halide high-pressure discharge lamp used here.
  • the 30% luminous flux of the preheated metal halide high-pressure discharge lamp is already after approx. 0.15 s (approx. 11 s)
  • the 50% luminous flux is present after approx. 0.25 s (approx. 20 s)
  • the 90% luminous flux is present after approx. 5 s (approx. 30 s) ( in brackets the times for a non-preheated metal halide high-pressure discharge lamp).
  • the heating device 21 in FIGS. 5 and 6 is composed of a double capillary 22 and a multiple capillary 23, the double capillary 22 being attached to the latter in the middle and at right angles to the multiple capillary 23.
  • Both capillaries 22, 23 are made of aluminum oxide ceramic and are commercially available.
  • the supply lines 24 are arranged within the double capillary 22, while the actual heating wire 25 (e.g. Kanthal®) is guided back and forth several times within the multiple capillary 23 in accordance with the number of individual capillaries.
  • the actual heating wire 25 e.g. Kanthal®
  • a different length of the heating conductor can be accommodated and the heating output can thus be determined within certain limits.
  • the multiple capillary 23 has six individual capillaries, so that the heating wire 25 runs six times the length of the multiple capillaries 23.
  • the length of the multiple capillary 23 is adapted to the width of the lamp pinch (see FIG. 7).
  • FIGS. 7 and 8 show a metal halide high-pressure discharge lamp 26, in which a heating device 21 corresponding to FIGS. 5 and 6 is fastened on each side in the transition region of the discharge vessel 27 and the sealing 28, which is designed here as a pinch.
  • the attachment is done, for example, with a putty (not visible), so that a good heat transfer to the discharge vessel 27 can take place.
  • the current leads 29 of the lamp 26 open into a base body 30 which is connected to the supply voltage required for the lamp 26.
  • the supply lines 24 of the heating device likewise open into the base body 30, the corresponding wiring - for example a series connection of the two heating devices - being carried out there.
  • Each of the two heating devices 21 is operated at approx. 10 W, which brings the discharge vessel 27 up to a temperature. 550 ° C is heated, which is sufficient for a quick start of the lamp 26.
  • the graph in FIG. 9 shows the course of the burn-in curves of a metal halide high-pressure discharge lamp in accordance with FIGS. 7 and 8, once without preheating (dash-dotted line) and once with preheating according to the invention (solid line) and the course of a conventional H4 bulb for car headlights (dashed line) .
  • the H4 lamp supplies only approximately 40% of the luminous flux of a metal halide high-pressure discharge lamp.
  • the 50% luminous flux after approx. 9 s approximately 54 s
  • the 90% luminous flux after approx. 29 s approximately 85 s

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP87112507A 1986-09-05 1987-08-27 Lampe à décharge à haute pression et méthode pour la faire fonctionner Withdrawn EP0258829A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3630338 1986-09-05
DE3630335 1986-09-05
DE19863630338 DE3630338A1 (de) 1986-09-05 1986-09-05 Hochdruckentladungslampe und verfahren zum betrieb
DE19863630335 DE3630335A1 (de) 1986-09-05 1986-09-05 Hochdruckentladungslampe und verfahren zum betrieb

Publications (2)

Publication Number Publication Date
EP0258829A2 true EP0258829A2 (fr) 1988-03-09
EP0258829A3 EP0258829A3 (fr) 1989-11-29

Family

ID=25847268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112507A Withdrawn EP0258829A3 (fr) 1986-09-05 1987-08-27 Lampe à décharge à haute pression et méthode pour la faire fonctionner

Country Status (1)

Country Link
EP (1) EP0258829A3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649827A1 (fr) * 1989-07-13 1991-01-18 Sodern Dispositif de chauffage d'un tube d'alumine et tube a decharge muni d'un tel dispositif
EP0828285A3 (fr) * 1996-09-06 1998-06-03 Matsushita Electric Industrial Co., Ltd. Lampe à halogénure métallique et système pour contrÔler sa température
DE10021510A1 (de) * 2000-05-03 2001-11-08 Mannesmann Vdo Ag Beleuchtungsvorrichtung
EP1134784A3 (fr) * 2000-03-17 2004-10-06 Ushiodenki Kabushiki Kaisha Dispositif luminescent comportant une lampe à mercure à haute pression et moyens d'allumage
EP2681081A1 (fr) 2011-03-02 2014-01-08 Audi AG Pièce d'habillage intérieur pour un véhicule automobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB573141A (en) * 1940-11-12 1945-11-08 Siemens Electric Lamps & Suppl Improvements relating to electric discharge lamps
US3806747A (en) * 1973-03-08 1974-04-23 Gte Sylvania Inc Sodium vapor lamp having an improved grooved alumina arc tube
DE3603743A1 (de) * 1986-02-06 1987-08-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe fuer die verwendung in kraftfahrzeugscheinwerfern

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649827A1 (fr) * 1989-07-13 1991-01-18 Sodern Dispositif de chauffage d'un tube d'alumine et tube a decharge muni d'un tel dispositif
EP0828285A3 (fr) * 1996-09-06 1998-06-03 Matsushita Electric Industrial Co., Ltd. Lampe à halogénure métallique et système pour contrÔler sa température
US6084351A (en) * 1996-09-06 2000-07-04 Matsushita Electric Industrial Co., Ltd. Metal halide lamp and temperature control system therefor
EP1134784A3 (fr) * 2000-03-17 2004-10-06 Ushiodenki Kabushiki Kaisha Dispositif luminescent comportant une lampe à mercure à haute pression et moyens d'allumage
DE10021510A1 (de) * 2000-05-03 2001-11-08 Mannesmann Vdo Ag Beleuchtungsvorrichtung
EP2681081A1 (fr) 2011-03-02 2014-01-08 Audi AG Pièce d'habillage intérieur pour un véhicule automobile

Also Published As

Publication number Publication date
EP0258829A3 (fr) 1989-11-29

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