EP1735814A2 - Lampe a decharge haute pression - Google Patents

Lampe a decharge haute pression

Info

Publication number
EP1735814A2
EP1735814A2 EP05742319A EP05742319A EP1735814A2 EP 1735814 A2 EP1735814 A2 EP 1735814A2 EP 05742319 A EP05742319 A EP 05742319A EP 05742319 A EP05742319 A EP 05742319A EP 1735814 A2 EP1735814 A2 EP 1735814A2
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
pressure discharge
lamp according
iodine
bromine
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
EP05742319A
Other languages
German (de)
English (en)
Other versions
EP1735814B1 (fr
Inventor
Michael Brinkhoff
Hans-Jürgen Keck
Rainer Kling
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 EP1735814A2 publication Critical patent/EP1735814A2/fr
Application granted granted Critical
Publication of EP1735814B1 publication Critical patent/EP1735814B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors

Definitions

  • the invention is based on a high-pressure discharge lamp according to the preamble of claim 1. These are metal halide lamps with double-sided squeezing with a high output of at least 1600 W.
  • the invention further relates to an associated luminaire.
  • Such lamps are known from EP 391 283 and EP 451 647. They are generally suitable for horizontal and vertical arrangement in a reflector.
  • a discharge lamp is presented that is suitable for both horizontal and vertical operation in a luminaire.
  • This high-pressure discharge lamp has the features of an elongate discharge vessel as the only against the piston, which defines an axial axis of symmetry and which is sealed on two sides by sealing parts, for example by squeezing or melting, and which encloses a discharge volume, with two electrodes on the axis facing each other, and which has an ionizable filling made of mercury, noble gas and metal halides contains, as well as power supplies, which are connected to the electrodes via foils and which exit at the ends of the discharge vessel, the lamp consuming at least 1600 W.
  • the shafts are designed as pins with a diameter of 0.5 to 1.15 mm.
  • the halogen for the halides is composed of the components iodine and possibly bromine, either only iodine or bromine and iodine being used together, the atomic ratio bromine / iodine being a maximum of 2. It is preferably a maximum of only 1.45.
  • At least part of the seal is preferably provided with a reflective coating.
  • the coating is a metallic or non-metallic layer, in particular made of zirconium oxide. This coating extends from the pinch edge at least 2 mm to the film, in particular at least over the entire length of the shaft inserted into the pinch. It is applied on one side when the lamp is installed close to the vertical in a reflector, ie with a maximum deviation of 45 ° to the vertical. When installed close to the horizontal with a deviation of less than 45 ° to the horizontal, this coating is applied on both sides to both bruises.
  • part of the two seals can be matted, as is known per se.
  • the matting is preferably a layer roughened by sandblasting or etching.
  • Metal halides of mercury and from the group of the elements Cs and rare earth metals such as Dy or Tm or Ho are particularly suitable as part of the filling, since they can be used to set a color temperature of at least 3300 K, preferably at least 3800 K. Depending on the desired color temperature, it is advisable to add sodium and / or manganese as the halide to the other metal halides.
  • thallium halide in particular thallium iodide, can be used to improve the color rendering index.
  • the high-pressure discharge lamp is designed to be particularly compact in that the discharge vessel (2) is the only bulb.
  • the high-pressure discharge lamp is characterized by the use of electrodes with a shaft and head, in which the shafts have a maximum diameter of 1.15 mm.
  • Such thin shafts have so far not been used for such lamps, since the filling previously contained a relatively large amount of bromine for an optimal halogen cycle which specifically attacks the shafts.
  • a relatively low-bromine filling can be used in a complete departure from the previous teaching, with a bromine / iodine mixture of up to an atomic ratio as the halide of a maximum of 2 can be used.
  • the low-bromine filling is particularly advantageous when low color temperatures are desired with the light color neutral white with color temperatures between 3300 and 4800 K, with either iodine alone or a bromine / iodine mixture up to an atomic ratio of up to 1.45 being preferred as the halide is.
  • Such low color temperatures have so far not been possible with generic lamps.
  • Such little bromine has little impact on the stems.
  • Typical is the use of pure iodine at low powers (typically 1600 W power) up to a Br / J ratio of 1.0 ⁇ 0.2 at higher powers (typically 2000 W). the specified performance relates to standard operation.
  • the thin shafts are particularly important because they affect a critical point in the functioning of the lamp.
  • the pin-shaped shaft is melted into the quartz glass and is under high thermal stress and high tension.
  • the quartz glass does not adhere to the pin, but a capillary inevitably forms between the pin and the quartz glass. Part of the filling condenses in the capillary, which forms a dead volume for the filling. This effect leads to the poor maintenance of such lamps which has been observed to date, but which seemed inevitable.
  • thin pins are not only sufficiently stable, so that the current load of typically 10 to 20 A is not a problem, but has the great advantage of a significantly lower dead volume associated with it , Because the thinner a pin, the narrower the dead volume in the seal around it.
  • thin pencils improve the Heat build-up in the area of the electrodes.
  • only one electrode can be equipped with a thin shaft in vertical operation, while the other has a conventional thick shaft with a typical 1.5 mm diameter.
  • the thin shaft also allows a relatively long distance between the film and the discharge volume, which reduces the risk of explosion and reduces the thermal load on the film.
  • the risk of explosion is due to the notch effect of the foil in the quartz glass.
  • the longer distance increases the dead volume only insignificantly, so that it is still considerably below the value of thick pencils as previously used.
  • a typical axial length of the pin in the quartz glass, calculated from the pinch edge to the beginning of the film, is now 5 to 7 mm, whereas previously a maximum of 4 mm was used.
  • An optimum for the diameter of the shaft with regard to stability on the one hand and dead volume on the other hand is approximately 0.9 to 1.1 mm.
  • the shafts are made, for example, from conventional tungsten material.
  • Such lamps can be operated with a moderate cycle, which leads to excellent maintenance.
  • the lamps not only achieve an exceptionally long service life in the range of 2500 to 6000 and typically 4500 hours, but also an excellent stability of the lighting properties. This is of the order of at least 90% at 1500 hours.
  • the lamp according to the invention also achieves a lifespan of at least 2500 hours in the particularly critical vertical operation in a compact luminaire, as a rule the lifespan is at least 4000 hours. Vertical operation enables a particularly high luminaire efficiency.
  • the light color is neutral white for applications in rooms or at dusk, and neutral white de luxe (HPS) with a color temperature of around 4100 to 4400 K and an Ra of at least 85 is well suited for the highest demands on color rendering.
  • the lamp according to the invention is also suitable for indirect lighting, for example with mirror projector systems, in which a high luminous flux is required.
  • light-active metal halide fillings contain small amounts of sodium and / or manganese as a component. This enables high luminous efficacies and the desired color components to be achieved. In contrast, a high sodium content leads to increased corrosion of the discharge vessel, although it is usually made of quartz glass. Therefore, the proportion of Na is chosen to be as low as possible in addition to the other constituents thallium, cesium and customary rare earth metals such as Dy, Ho or Tm, and in particular sodium is completely or partially replaced by manganese.
  • the ends of the discharge vessel can preferably be coated with a reflective layer only for a short time, typically 2 mm.
  • a reflective layer only for a short time, typically 2 mm.
  • An optimal film end temperature is 350 to 390 ° C. It can be specifically adjusted, for example, by the distance of the film from the discharge volume and its length. At higher temperatures, there is a risk of early corrosion, which will shorten the service life.
  • the wall load is best at around 60 to 75 W / cm 2 .
  • the temperature at the end of the film is particularly critical.
  • the matting should therefore cover the area of the outer film end. It advantageously extends to the end of the bruising. Inside, towards the discharge, it can at least extend at least to the middle of the film, possibly also significantly beyond, for example to the inner end of the film.
  • Typical distances between the electrode tips are 25 to 35 mm for particularly compact lamps, but distances of up to 100 mm or more are also possible. The minimum distance is 20 mm.
  • Figure 1 shows a metal halide lamp in side view
  • Figures 2 and 3 each another embodiment of a metal halide lamp.
  • FIG. 1 schematically shows a 1600 W high-pressure discharge lamp 1 without an outer bulb with a length of approximately 190 mm, as is described in more detail, for example, in US Pat. No. 5,142,195. It is intended for use in reflectors, whereby it is arranged axially to the reflector axis.
  • the discharge vessel 2 made of quartz glass defines a longitudinal axis X and is designed as a barrel body 3, the generatrix of which is a circular arc.
  • the discharge volume is approximately 20 cm 3 .
  • the rod-shaped tungsten electrodes 6 with the helix 7 pushed on as the head are axially aligned at the two ends of the discharge vessel in bruises 5.
  • the electrodes 6 are fastened to foils 8 in the pinch 5, on which external current leads 9 attach.
  • a ceramic base 11 with putty (not shown) is attached to the end 20 of the pinch 5 remote from the discharge.
  • the discharge vessel 2 contains a filling of an inert gas as the starting gas, mercury and metal halides.
  • HgBr2 and HgJ2 as well as the light-active filling NaJ, CsJ, TU and DyJ3 as well as TmJ3 are used as metal halide.
  • the ratio Br / J is about 0.2.
  • the lamp is operated horizontally.
  • the cold filling pressure of the starting gas is at most 1 bar.
  • the light color is realized in neutral white with a typical color temperature of 4000 K through the filling.
  • a typical diameter the shaft 6 of the electrode is 1.0 mm.
  • the metal halide HgBr2 and the light-active filling NaJ, CsJ, TIJ3 and DyJ3 and TmJ3 are recommended.
  • the ratio Br / J is about 0.9.
  • a typical filling is:
  • TmJ3 0.2 to 0.8 ⁇ mol / cm 3 ;
  • HgJ2 0 to 1.5 ⁇ mol / cm 3 ;
  • HgBr2 0 to 3 ⁇ mol / cm 3 .
  • a relatively narrow coating 9 on the lower pinch 3a lowers the wall load caused thereby.
  • a wall load value of at most 75 W / cm 2 is desirable.
  • a wall load of 65 to 70 W / cm 2 provides good results.
  • the heat accumulation effect is further increased by the shaft 23 being lengthened and the film 8 being shortened, in each case seen in axial length.
  • the embedding of the shaft in the pinch is then at least 6 mm.
  • the coating 9 extends approximately from the pinch edge to the end of the shaft on the film.
  • the ends of the coating are designated by the reference numbers 30 and 29.
  • a matting 12 is also applied to both shafts 3a and 3b and extends for both the upper and the lower pinch approximately from the outer end 20 of the pinch up to 60% of the length of the film.
  • the inner end of the matting is labeled 31.
  • FIG. Another exemplary embodiment is shown in FIG. It is a 2000 W metal halide lamp 40 for a horizontal burning position, which is otherwise similar to that described in FIG. 2. It is suitable for neutral white light colors from 3500 to 4800 K.
  • the uniform temperature distribution allows the use of thin pins 41 as a shaft (0.5 to 1.15 mm in diameter), which can be more densely embedded in the quartz glass when squeezed and reduce the volume of the capillaries surrounding them as dead space.
  • Such a thin shaft 41 must be compatible with the design of the halogen cycle process, in particular through careful selection of the bromine / iodine ratio as shown above.
  • Such thin shafts also limit heat dissipation, so that additional heat build-up occurs at this point, which prevents the formation of a metal halide sump.
  • This enables a symmetrical reflector coating 42 on the two bruises 43 with a small axial length, which avoids shadowing.
  • a narrow coating 42 on the two bruises 43 reduces the resulting wall load to approximately 60 W / cm z .
  • the heat accumulation effect is increased by the shaft 41 being lengthened and the film 44 being shortened, as seen in each case in axial length.
  • the embedding of the shaft in the pinch is about 12 mm.
  • the coating 42 extends from the pinch edge 42a to 2 mm beyond the end of the shaft on the film, the outer end is designated 42b.
  • a matting 45 extends on both bruises approximately from the outer end 46 of the bruise to 60% of the length of the film.
  • the inner end of the matting is labeled 47. It slightly overlaps the outer end of the coating.
  • HgBr2 and the light-active filling MnJ2, CsJ, TU and DyJ3 and TmJ3 are used as the metal halide.
  • the ratio Br / J is about 1.1.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

La présente invention concerne une lampe à décharge haute pression présentant un axe de symétrie axiale et étant remplie d'halogénure de métal, ladite lampe comprenant des électrodes qui se présentent sous la forme de tiges de diamètre de 0,5 à 1,15 mm. L'halogène utilisé pour l'halogénure, est de l'iode ou un mélange brome et iode, le rapport atomique brome/iode valant au maximum 2.
EP05742319.6A 2004-04-16 2005-04-14 Lampe a decharge haute pression Expired - Lifetime EP1735814B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004019185A DE102004019185A1 (de) 2004-04-16 2004-04-16 Hochdruckentladungslampe
PCT/DE2005/000684 WO2005101455A2 (fr) 2004-04-16 2005-04-14 Lampe a decharge haute pression

Publications (2)

Publication Number Publication Date
EP1735814A2 true EP1735814A2 (fr) 2006-12-27
EP1735814B1 EP1735814B1 (fr) 2017-07-26

Family

ID=35140059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05742319.6A Expired - Lifetime EP1735814B1 (fr) 2004-04-16 2005-04-14 Lampe a decharge haute pression

Country Status (7)

Country Link
US (1) US7973482B2 (fr)
EP (1) EP1735814B1 (fr)
JP (1) JP4560085B2 (fr)
CN (1) CN100585790C (fr)
CA (1) CA2562726A1 (fr)
DE (2) DE102004019185A1 (fr)
WO (1) WO2005101455A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025947A1 (de) * 2006-06-02 2007-12-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidfüllung für eine elektrische Hochdruckentladungslampe und zugehörige Lampe
DE102006034833A1 (de) * 2006-07-27 2008-01-31 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US9485845B2 (en) * 2013-03-13 2016-11-01 Lux Montana LLC Electrical discharge lighting

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Also Published As

Publication number Publication date
EP1735814B1 (fr) 2017-07-26
JP4560085B2 (ja) 2010-10-13
CN100585790C (zh) 2010-01-27
US20070200504A1 (en) 2007-08-30
WO2005101455A2 (fr) 2005-10-27
DE102004019185A1 (de) 2005-11-10
CN1943005A (zh) 2007-04-04
JP2007533087A (ja) 2007-11-15
WO2005101455A3 (fr) 2006-08-24
US7973482B2 (en) 2011-07-05
CA2562726A1 (fr) 2005-10-27
DE112005001399A5 (de) 2007-05-24

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