WO2010004685A1 - Lampe à décharge à haute intensité - Google Patents

Lampe à décharge à haute intensité Download PDF

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Publication number
WO2010004685A1
WO2010004685A1 PCT/JP2009/002524 JP2009002524W WO2010004685A1 WO 2010004685 A1 WO2010004685 A1 WO 2010004685A1 JP 2009002524 W JP2009002524 W JP 2009002524W WO 2010004685 A1 WO2010004685 A1 WO 2010004685A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
rare earth
earth metal
coil
hid lamp
Prior art date
Application number
PCT/JP2009/002524
Other languages
English (en)
Japanese (ja)
Inventor
加藤育宏
Original Assignee
上海精瓷照明電器有限公司
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 上海精瓷照明電器有限公司 filed Critical 上海精瓷照明電器有限公司
Publication of WO2010004685A1 publication Critical patent/WO2010004685A1/fr

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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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors

Definitions

  • the present invention relates to an HID lamp (high-intensity discharge lamp) used as a lamp having high luminance, high efficiency, and high color rendering.
  • HID lamp high-intensity discharge lamp
  • an electrode is held at both ends of a discharge vessel, and power is supplied to the electrode from the outside through a molybdenum foil.
  • silica and alumina ceramics are used as the material for the discharge vessel.
  • a high color rendering property is expressed in the discharge vessel as a rare earth gas.
  • Halogen compounds composed of multiple rare earth metals such as dysprosium (Dy), scandium (Sc), neodymium (Nd), europium (Eu), holmium (Ho), thulium (Tm), ytterbium (Yb) are enclosed for the purpose.
  • Metal halide lamps are known.
  • a plug of an electrode which is sealed with frit glass and a part of the electrode is exposed to the outside from the sealed portion is made of niobium (Nb) or an alloy thereof similar in thermal behavior to the material of the discharge vessel, and further tungsten ( W), molybdenum (Mo), conductive ceramics and glass containing a heat-resistant metal such as niobium (Nb), and the tip portion facing the discharge space from the intermediate portion held inside the sealed portion has excellent heat resistance and Tungsten (W) or molybdenum (Mo) that is chemically stable against metal halide is used, and these are welded to form one electrode.
  • Patent Document 4 a thin film made of an oxide of a rare earth metal constituting a metal halide sealed in a discharge vessel on the surface of a plug made of Nb or an alloy thereof, and on the surface of a welded portion between the plug and the electrode. Has been proposed to prevent Nb from forming a low melting point alloy with a W or Mo electrode.
  • the present invention provides an electrode unit formed by welding an electrode made of tungsten (W) or molybdenum (Mo) to a plug made of niobium (Nb) or an alloy thereof, at both ends of a ceramic discharge vessel.
  • a ceramic discharge vessel In an HID lamp that is inserted into a sealing portion provided in a section, filled with frit glass between the sealing portion and a plug, and wound around the outside of the electrode, between the electrode and the coil
  • the gap formed was filled with an oxide of a rare earth metal constituting a compound (metal halide) of a rare earth metal and a halogen sealed in the discharge vessel.
  • the filling of the present invention includes cases where some gaps remain.
  • a compound of rare earth metal and halogen enclosed in the discharge vessel in a region straddling the welded portion between the plug and the electrode on the outer peripheral surface of the electrode unit is further improved by forming a film of an oxide of a rare earth metal constituting (metal halide).
  • rare earth metal examples include dysprosium (Dy), scandium (Sc), neodymium (Nd), europium (Eu), holmium (Ho), thulium (Tm), ytterbium (Yb), or a simple substance. . Further, as a method for forming the thin film, a dipping method, a thermal spraying method, a CVD method, a gas deposition method, or the like can be employed.
  • the metal halide does not easily reach the plug containing niobium (Nb)
  • the niobium (Nb) is dissociated by the substitution reaction, and the electrode member such as tungsten (W) or molybdenum (Mo) has a low melting point. It is possible to prevent the alloy from being formed, and the life can be greatly improved.
  • FIG. 3B is an enlarged view of the main part.
  • FIG. 1 is an overall view of a luminaire incorporating the HID lamp according to the present invention
  • FIG. 2 is a cross-sectional view of the main part of the HID lamp according to the present invention
  • (b) is a figure which shows the state which wound the coil around the electrode outer peripheral surface
  • FIG. 4 is the principal part enlarged view of FIG.3 (b).
  • the electrode units 7 and 8 are configured by welding electrodes 7b and 8b made of tungsten (W) or molybdenum (Mo) to plugs 7a and 8a made of niobium (Nb) or an alloy thereof.
  • the plugs 7a and 8a and the electrodes 7b and 8b are laser-welded from the outside in a state where the concave and convex portions are fitted.
  • the discharge vessel of the HID lamp 3 is made of silica or alumina ceramics, the central part is a light emitting part 3a, both ends are sealed parts 3b, and the rare earth gas in the light emitting part 3a is nitrogen, argon, krypton, xenon, mercury. , Sodium halides, and other types of halides (mainly iodides) such as rare earth metals (Dy) are encapsulated.
  • Nb (niobium) plugs 7a and 8a are hermetically held in the sealing portion 3b through a sealing material (frit glass) 9, and the sealing material 9 has a softening point (for example, slightly higher than 1500 ° C.).
  • Dy 2 O 3 —SiO 2 —Al 2 O 3 based frit glass having a significantly lower viscosity is used.
  • a cooling coil 10 is wound around the distal ends of the electrodes 7b and 8b, a cooling coil 11 is wound from the intermediate portion of the electrodes 7b and 8b to the welded portion, and the coil 11 and the electrodes 7b and 8b.
  • Dy 2 O 3 In order to fill Dy 2 O 3 , for example, as shown in FIG. 3A, a fine powder of Dy 2 O 3 is ejected from the nozzle 13 at a high speed, and the surface of the electrodes 7b and 8b is Dy 2 O at room temperature. 3 film 12 is formed, and then as shown in (b), Dy 2 O 3 Turn strongly wound from the outer coil 11 of the film 12, the coil 11 is wound so as to bite into the Dy 2 O 3 film 12. As a result, as shown in FIG. 4, the gap between the coil 11 and the electrodes 7b and 8b is filled with Dy 2 O 3 . Since Dy 2 O 3 is densely packed in this way, the rare earth metal vapor can reach the Nb plugs 7a and 8a, and no substitution reaction occurs.
  • the method of forming the rare earth metal oxide film is not limited to the above, and any method such as thermal spraying, CVD, sandblasting, dip coating may be used. Whichever method is adopted, the thickness of the film is preferably 30 ⁇ m or less when the electrode diameter is 0.7 mm ⁇ .
  • SYMBOLS 1 ... Outer tube, 2 ... Inner tube, 3 ... HID lamp, 3a ... Light emission part, 3b ... Sealing part, 4 ... Base, 5, 6 ... Conductor, 7, 8 ... Electrode unit, 7a, 8a ... Plug body , 7b, 8b ... electrode, 9 ... sealing material, 10, 11 ... coil wound electrodes, 12, 14 ... Dy 2 O 3 film, 13 ... nozzle.

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

Abstract

L'invention porte sur une lampe à décharge à haute intensité (DHI) qui peut supprimer une réaction chimique entre un métal du groupe des terres rares, qui est scellé de manière étanche dans un contenant de décharge électrique, et une électrode, et qui par conséquent peut améliorer de manière significative la durée de vie de la lampe. Une bobine (10) pour un refroidissement est enroulée autour de l'extrémité avant des électrodes (7b, 8b). Une bobine (11) pour un refroidissement est enroulée autour d'une partie de la partie moyenne à une partie soudée des électrodes (7b, 8b). En outre, l'espace entre la bobine (11) et les électrodes (7b, 8b) est rempli de Dy2O3 à titre d'oxyde d'un métal du groupe des terres rares constituant un composé (halogénure de métal) d'un métal du groupe des terres rares scellé de manière étanche dans le contenant de décharge électrique et d'un halogène. Ainsi, étant donné que Dy2O3 est rempli de cette façon, de la vapeur du métal du groupe des terres rares n'atteint pas le butoir (7a, 8a) de Nb et, ainsi, aucune réaction de substitution ne se produit.
PCT/JP2009/002524 2008-07-07 2009-06-04 Lampe à décharge à haute intensité WO2010004685A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008176415A JP2010015911A (ja) 2008-07-07 2008-07-07 Ｈｉｄランプ
JP2008-176415 2008-07-07

Publications (1)

Publication Number Publication Date
WO2010004685A1 true WO2010004685A1 (fr) 2010-01-14

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ID=41506813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/002524 WO2010004685A1 (fr) 2008-07-07 2009-06-04 Lampe à décharge à haute intensité

Country Status (2)

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JP (1) JP2010015911A (fr)
WO (1) WO2010004685A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3995053B1 (ja) * 2007-06-18 2007-10-24 育宏 加藤 Ｈｉｄランプ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3995053B1 (ja) * 2007-06-18 2007-10-24 育宏 加藤 Ｈｉｄランプ

Also Published As

Publication number Publication date
JP2010015911A (ja) 2010-01-21

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