WO2012136510A1 - Lampe à décharge, en particulier lampe à décharge basse pression à mercure, et procédé de fabrication d'une lampe à décharge - Google Patents

Lampe à décharge, en particulier lampe à décharge basse pression à mercure, et procédé de fabrication d'une lampe à décharge Download PDF

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Publication number
WO2012136510A1
WO2012136510A1 PCT/EP2012/055378 EP2012055378W WO2012136510A1 WO 2012136510 A1 WO2012136510 A1 WO 2012136510A1 EP 2012055378 W EP2012055378 W EP 2012055378W WO 2012136510 A1 WO2012136510 A1 WO 2012136510A1
Authority
WO
WIPO (PCT)
Prior art keywords
cross
discharge lamp
electrode
glass
sectional widening
Prior art date
Application number
PCT/EP2012/055378
Other languages
German (de)
English (en)
Inventor
Reinhold Schmidt
Andreas Engel
Jürgen Dichtl
Original Assignee
Osram Ag
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 Ag filed Critical Osram Ag
Priority to KR1020137029076A priority Critical patent/KR20140034780A/ko
Priority to CN2012800173048A priority patent/CN103460333A/zh
Publication of WO2012136510A1 publication Critical patent/WO2012136510A1/fr

Links

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
    • H01J61/045—Thermic screens or reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
    • 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

Definitions

  • Discharge lamp in particular low-pressure mercury discharge lamp, and method for producing a discharge lamp
  • the invention relates to a discharge lamp, in particular a low-pressure mercury discharge lamp with a tubular discharge vessel, in which extend over at least a first end of the discharge vessel Elektrodenträ ⁇ ger, where an electrode is arranged, wherein the electrode carrier held in a end arranged th rod-shaped Glaseinschmelzung are having a cross-sectional widening.
  • the invention relates to a method for producing a discharge lamp.
  • the luminous flux and the luminous efficacy of fluorescent lamps are essentially dependent on the level of mercury vapor pressure in the lamp.
  • the mercury vapor pressure is determined by the temperature of the cold spot in the lamp, which in turn depends on the transition temperature.
  • An optimal luminous flux and a luminous efficacy in a particularly favorable manner exist when the coldest point has a temperature of about 45 ° C. As in most cases, the coldest spot at normal ambient temperatures in lights too is hot, in order to ensure an optimal luminous flux, an even colder place must be created by technical means.
  • a discharge lamp according to the invention is designed in particular as a low-pressure mercury discharge lamp.
  • the discharge lamp comprises a tubular discharge ⁇ vessel into which extend over a first end of the vessel Entla ⁇ dung electrode carrier.
  • An electrode is arranged on the electrode carriers, wherein the electrode carriers are held in a tube-shaped glass enamel which is arranged at the end.
  • the tubular glass fusion has a cross-sectional broadening. This cross-sectional broadening, viewed in the direction of the longitudinal axis of the glass fusion, is set back relative to the electrode-facing front end of the glass-enamel at the glass fusion.
  • the lamp end is thereby the coldest spot or the so-called cold spot in the lamp and the mercury vapor pressure can be regulated accordingly.
  • This configuration of the discharge lamp can thus be correspondingly improved the luminous flux and the luminous efficacy and the temperature of the coldest spot can be lowered compared to conventional approaches.
  • the coolest point is thereby adjustable to a Tem ⁇ temperature of about 45 ° C.
  • the very site-specific formation of the cross-sectional broadening of the glass melt also prevents this from having a negative effect on the firing and ignition voltages of the lamp.
  • the shielding of the lamp end to the electrode causes a very effective prevention of direct heat transfer and the lamp end heats up significantly less.
  • the cross-sectional broadening in a middle third of the length of the glass melting leads to a stem of the glass melt.
  • This site-specific binding of the cross-section Spread ⁇ tion is advantageous in view of the stable attachment and affects other intermediate components, in particular the electrode carrier and the electrode is not.
  • the cross-sectional broadening opens into a stem of the glass melt at the level of a round cross-section of the glass melt.
  • a glass melting at its front end facing the electrode usually has no round cross-section, but is oval, just when such Querterrorismsverumble ⁇ ments are circumferentially formed on the Glaseinschmelzung and formed with the same depth, different distances between this Glaseinschmelzung and the tubular discharge vessel arise.
  • the front end of the glass fusion is formed as a widening compared to the length of the Glaseinschmelzung between the spread at the front end and the cross-section widening.
  • the widening is very small in comparison to the cross-sectional widening.
  • This broadening can yield on the basis of a ⁇ melting of the electrode carrier at the front end, for example. It is preferably provided that a perpendicular considered one in the direction of the longitudinal axis distance between the radially outer point of the cross-sectional widening and the inside of the discharge vessel is less than 5 mm, in particular ⁇ sondere less than 3 mm.
  • the Glaseinschmelzung may be performed, for example, in the manner of a plate tube, wherein the Entladungsge ⁇ vessel final glass plate is extended by a tube with a smaller diameter than that of the discharge vessel. In this tube, the electrode carrier can be guided and fixed at its end by fusion.
  • a pumping tube can be performed, via which the discharge vessel can be evacuated and filled with gas.
  • the cross-sectional enlargement is formed completely circumferentially around a stem of the glass fusion.
  • the prevention of heat transfer to the lamp end can be achieved in this way particularly ef ⁇ Anlageniv.
  • the cross-sectional distribution is formed as an only radially extending web. In the case of a design of this type, a three-dimensional view thus forms an annular peripheral web, which thus also has a quasi disc-shaped design.
  • the cross-sectional widening is formed like a cup.
  • the front free end of the cross-sectional widening has a radially outwardly oriented end portion. This is thus directed almost perpendicular to a longitudinal axis of the discharge vessel and the glass ⁇ melting.
  • the cross-sectional distribution is formed as a pipe section.
  • the pipe section branches off from the trunk and then merges into a partial section formed with a diameter that is substantially the same as the free end.
  • the end section is arranged backward relative to the front end of the glass melt in the direction of the longitudinal axis.
  • the cross-sectional broadening in the direction of Longitudinal axis does not look over the front end of the Glaseinschmelzung over.
  • the end section viewed in the direction of the longitudinal axis, is arranged contactless with respect to the trunk at the level of a non-round cross section of the stem of the glass fusion.
  • the glass fusion is formed integrally with the cross-sectional widening and both Materia ⁇ Lien are thus glass.
  • Such a one-piece design enables a component reduction on the one hand and the avoidance of positional tolerances compared to separate parts on the other hand.
  • the discharge lamp is designed as a two-sided socketed.
  • it is ⁇ forms as a flashlight with a straight discharge vessel, wherein the electrode support of the first electrode via the first end of the discharge vessel extending further into the interior of the discharge vessel, as an electric ⁇ the wearer a second electrode extending over a second end of the discharge vessel in the interior horrre ⁇ CKEN.
  • Such a configuration corresponds to the already mentioned cold foot technique, so that the electrode carrier, which extend further into the interior of the discharge vessel, form the cold leg at the lamp end.
  • the above advantages in terms of lowest possible heat transfer from the E- lektrode on the lamp end, improved luminous efficacy and improved light output of the lamp, and no unwanted ⁇ desired effects on the combustion and ignition voltages of the lamp are particularly guidedzulanderd reached.
  • the Kaltfußtechnik is thus preferably provided on the side of the discharge vessel, on which the cross-sectional broadening of the glass melting is provided.
  • the electrode carriers of a second electrode are preferably also supported by a tube-shaped glass enamel which is arranged at the end, but this does not necessarily have a cross-sectional widening.
  • the discharge vessel is not designed to extend in a straight line and, for example, bent in a U-shape, bent several times, is annular or spirally wound.
  • the invention also relates to a method for producing a discharge lamp, in particular a low-pressure mercury discharge lamp, having a tubular discharge vessel into which electrode carriers extend via a first end of the discharge vessel. To the electrode carriers one electrode is arranged, the electrode carrier can be held in an End arrange ⁇ th tubular glass seal, which is formed with a cross sectional distribution. The cross-sectional broadening, viewed in the direction of the longitudinal axis of the glass fusion, is set back relative to the electrode-facing front end of the glass melt at the glass melt.
  • cross-sectional broadening is produced by compression of the heated glass material of the glass melt. This is particularly advantageous if the cross-sectional broadening is formed as a simple, in particular only radially extending, circumferential web on a stem of the glass fusion.
  • Figure 1 is a schematic Thomasteils notorious Aus ⁇ leadership example of a discharge ⁇ charge lamp according to the invention.
  • Figure 3 is an enlarged sectional view of a partial section of a ⁇ invention ⁇ discharge lamp with a glass seal and a cross-sectional enlargement according to a second embodiment.
  • FIG. 4 is an enlarged sectional view of a partial ⁇ section of a discharge ⁇ lamp according to the invention with a Glaseinschmelzung and a cross-sectional widening according to a third embodiment
  • FIG. 5 shows a diagram in which the temperature of the coolest point of the lamp and the luminous flux as a function of the ambient temperature for a discharge lamp according to the prior art on the one hand and for an embodiment of a discharge lamp according to the invention on the other hand, are shown.
  • a discharge lamp 1 is shown in a schematic sectional view, which is designed as a low-pressure mercury discharge lamp. It is designed in the exemplary embodiment as a double-capped flashlight.
  • it comprises a tubular discharge vessel ⁇ 2, which is formed as shown in Fig. 1 geradli ⁇ nig.
  • each socket 5 and 6 are madebil ⁇ det, at each of which electrical contacts 7, 8, 9, 10th are arranged and extend to the outside.
  • the two ⁇ -ended discharge lamp 1 includes a first electrode 11 which is on the electrode support 12 and 13 supported ⁇ th.
  • the electrode supports 12 and 13 are melted into a glass melt 14 and extend over the first end 3 into the interior of the discharge vessel 2.
  • the glass melt 14, which is also referred to as a plate tube, is tubular and the E- lektrodenarni 12 and 13 are therein led and held and partially melted down.
  • an electrode 15 is likewise formed, which is held over two electrode supports 16 and 17.
  • the two electrode supports 16 and 17 are also fused into a Glaseinschmelzung 18, which is also tubular.
  • the electrode supports 16 and 17 extend via the second lamp end 4 into the interior of the discharge vessel 2. In particular, between the electrodes 11 and 15, the discharge path is formed.
  • the first two electrode carrier extending 12 and 13 further into the interior of the discharge vessel 2 as the second electrode support 16 and 17.
  • a coolest Stel ⁇ le 19 formed in the region of the lamp end 3.
  • a Kaltfußtechnik in the discharge lamp 1 is formed ⁇ , wherein the Kaltfuß is formed by this longer frame or the electrode supports 12 and 13.
  • a first cross-sectional Spread ⁇ tion is formed on the glass seal 14 twentieth
  • This cross-sectional widening 20 is formed completely circumferentially and, moreover, viewed in the direction of the longitudinal axis A of the discharge lamp 1 and thus also the Glaseinschmel ⁇ tion 14, formed between the first lamp end 3 and the first electrode 11.
  • this first cross-sectional widening 20, viewed in the direction of the longitudinal axis A is formed at the level of a cross section of the glass fusion 14 that is substantially round in the YZ plane.
  • a distance d1 between a radially outermost point 20a of the cross-sectional widening 20 and an inner side 21 of the discharge vessel 2 is thus essentially the same and is preferably less than 3 mm.
  • a second cross-sectional widening 22 is formed on the local glass fusion 18. Also, it is fully realized Siert circumferentially and also in the direction of the longitudinal axis A betrach ⁇ tet at the level of a circular cross section of the Glaseinschmel ⁇ Zung 18 is formed. A distance d2 is preferably formed equal to the distance dl.
  • Fig. 2 is an enlarged sectional view of a partial section of an embodiment of the Entla ⁇ tion lamp 1 is shown.
  • the cross-sectional widening 20 is designed as a web oriented exclusively in the radial direction and is therefore designed in three-dimensional view as a horizontally oriented circumferential ring or disk.
  • the cross- sectional widening 20 is formed in a middle third of the entire length of the Glaseinschmelzung 14.
  • the cross-sectional widening 20 is formed on a stem 24 of the glass melt 14 in the region of a substantially round cross section of the trunk 24 opening.
  • that part of the stem 24 is formed which does not have a round cross-section.
  • This is exemplified in the Thomasdar ⁇ position by the reduction in cross section between the front end 23 and the esterification Querterrorismverbrei- 20 is shown.
  • a further widening 25 is formed at the front end 23, a further widening 25 is formed.
  • this is significantly smaller than the Querterrorismsverbrei ⁇ tion 20 and has nothing to do in terms of the mentioned radio ⁇ tionality, which is achieved with the cross-sectional widening 20.
  • Fig. 3 is a schematic sectional view of another embodiment of a discharge lamp 1 in an analogous representation to Fig. 2 is shown.
  • the cross-sectional widening is formed like a kelch and also formed fully circumferentially around the axis A.
  • the cross-sectional widening 20 opens at a point 26 to the trunk 24, which here is the point 26 in a middle third of the length of Glasein- fusion 14.
  • this location is 26 also here in a region in which the trunk 24 has a substantially round cross-section.
  • the cross-sectional widening 20 is not designed exclusively as a web oriented in the radial direction, but extends from the point 26 outwards and forwards towards the front end 23.
  • the transverse ⁇ broadening 20 formed opposite to the front end 23 in turn set back and ends with a radially oriented end portion 27.
  • the radially outermost point 20a whereby also the distance between this outermost point 20a and the inner side 21 of the discharge vessel represents a distance dl, which is also preferably again smaller than 3 mm.
  • FIG. 4 shows a schematic sectional view of a further exemplary embodiment of a discharge lamp 1 in an analogous representation to FIG. 2.
  • the cross-sectional widening is formed as a pipe section 28 and also formed fully circumferentially about the axis A.
  • the cross-sectional widening 20 opens at a point 26 to the trunk 24, wherein here too the position 26 is located in a middle third of the length of the glass fusion 14.
  • this point 26 is here in a region in which the trunk 24 has a substantially round cross-section.
  • the cross-sectional widening 20 is not exclusive designed as a radially oriented web, but extends from the point 26 swinging outwards and forwards towards the front end 23.
  • the transverse section widening 20 opposite the front end 23 is again set back and ends with a radially oriented end portion 27a.
  • This then again has the radially outermost point 20a, wherein here too the distance between this outermost point 20a and the inner side 21 of the discharge vessel is a distance dl, which is also preferably again smaller than 3 mm.
  • the pipe section 28 subsequently ⁇ zd adjoined by dissemination ternden from the point 26 to the outside top portion of the cross-sectional widening 20 the end portion 27a of the to a free prede ⁇ ren end 27b has a substantially constant diameter ,
  • the outermost point 20a is thus formed in this embodiment, virtually over the entire length of the end portion 27a.
  • the cross-sectional widening 20 is preferably produced by a compression of the existing glass material of the glass fusion 14 in the direction of the longitudinal axis A. It is not to ⁇ sharmliches glass material for the glass seal 14 beige ⁇ placed under a compressive strain. Alternatively, additional glass could be applied if necessary.
  • the cross-sectional widening 20 is generated in that the existing Glaseinschmel ⁇ tion 14 additional glass material is melted at the point 26 and thereby then the additional shape according to the cup is produced.
  • the glass fusion 14 is integrally formed with the cross-sectional widening 20 and thus they also have the same glass material.
  • Fig. 5 a diagram is shown in which the light ⁇ current efficiency LS is disposed in percent for a T5 HO 54W lamp on the left vertical axis and on the computing ⁇ th vertical axis the temperature of the coolest point, and thus the cold spots in ° C is specified.
  • the ambient temperature Ta is angege ⁇ ben in ° C.
  • the curve II represents the luminous flux profile of a discharge lamp according to the prior art, in which no such cross-sectional widening 20 are formed.
  • the curve III indicates the temperature profile of the cold spot of a lamp which has no such cross-sectional widenings 20.
  • the curve IV shows the course of the luminous flux in a discharge lamp 1 according to FIG. 1 to 3.
  • the curve V shows the temperature profile of the cold spot or the coolest point 19 of Entla ⁇ tion lamp 1 of FIG. 1 to 3 .
  • the temperature of the coolest point 19 by the discharge lamp 1 according to FIG. 1 to 3 compared to conventional lamps without such a cross-sectional widening at the locally specified location by about 10 ° C. be lowered.
  • the luminous flux is increased according to the percentage compared to conventional lamps without a cross-sectional constriction at the position offset from the front end.

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne une lampe à décharge (1), en particulier une lampe à décharge basse pression à mercure, comprenant une enceinte à décharge (2) tubulaire, dans laquelle s'étendent, par l'intermédiaire d'une première extrémité (3, 4) de l'enceinte de décharge (2), des supports d'électrode (12, 13, 16, 17) comportant une électrode (11, 15). Les supports d'électrode (12, 13, 16, 17) sont maintenus dans un scellement en verre (14, 18) tubulaire agencé à l'extrémité qui présente un élargissement de section transversale, l'élargissement de section transversale (20) étant réalisé, vu en direction de l'axe longitudinal (A) du scellement en verre (14, 18), en retrait par rapport à l'extrémité (23) avant du scellement en verre (14, 18) tournée vers l'électrode (11, 159). L'invention concerne également un procédé de fabrication d'une lampe à décharge (1).
PCT/EP2012/055378 2011-04-04 2012-03-27 Lampe à décharge, en particulier lampe à décharge basse pression à mercure, et procédé de fabrication d'une lampe à décharge WO2012136510A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020137029076A KR20140034780A (ko) 2011-04-04 2012-03-27 방전 램프, 특히 수은 저압 방전 램프, 그리고 방전 램프를 제조하기 위한 방법
CN2012800173048A CN103460333A (zh) 2011-04-04 2012-03-27 放电灯、尤其是低压汞放电灯以及用于制造放电灯的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006700A DE102011006700A1 (de) 2011-04-04 2011-04-04 Entladungslampe, insbesondere Quecksilber-Niederdruckentladungslampe, sowie Verfahren zum Herstellen einer Entladungslampe
DE102011006700.0 2011-04-04

Publications (1)

Publication Number Publication Date
WO2012136510A1 true WO2012136510A1 (fr) 2012-10-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/055378 WO2012136510A1 (fr) 2011-04-04 2012-03-27 Lampe à décharge, en particulier lampe à décharge basse pression à mercure, et procédé de fabrication d'une lampe à décharge

Country Status (4)

Country Link
KR (1) KR20140034780A (fr)
CN (1) CN103460333A (fr)
DE (1) DE102011006700A1 (fr)
WO (1) WO2012136510A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB863467A (en) * 1957-05-21 1961-03-22 Gen Electric Co Ltd Improvements in or relating to low pressure electric discharge lamps
US3252028A (en) * 1961-06-23 1966-05-17 Westinghouse Electric Corp High-output fluorescent lamp having means for maintaining a predetermined mercury vapor pressure during operation
US3898511A (en) 1974-04-22 1975-08-05 Gte Sylvania Inc Fluorescent lamp containing amalgam-forming material for reducing stabilization time
US5686795A (en) * 1995-10-23 1997-11-11 General Electric Company Fluorescent lamp with protected cathode to reduce end darkening
EP1063680A1 (fr) * 1998-03-20 2000-12-27 Matsushita Electric Industrial Co., Ltd. Lampe fluorescente
EP1253623A2 (fr) 2001-04-26 2002-10-30 General Electric Company Lampe fluorescente basse-tension
DE102006033672A1 (de) 2006-07-20 2008-01-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Beleuchtungssystem mit einer Entladungslampe und einem elektronischen Vorschaltgerät und Verfahren zum Betreiben eines Beleuchtungssystems
JP2008140699A (ja) * 2006-12-04 2008-06-19 Toshiba Lighting & Technology Corp 蛍光ランプおよび照明器具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT214011B (de) * 1958-12-06 1961-03-10 Egyesuelt Izzolampa Niederdruck-Quecksilberdampfentladungslampe
US5374871A (en) * 1992-07-21 1994-12-20 General Electric Company Annular dosing capsule for electric discharge lamp and method of dosing the lamp using the capsule
DE9305977U1 (de) * 1993-04-20 1993-08-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Zweiseitig gesockelte Niederdruckentladungslampe
DE4445532A1 (de) * 1994-12-20 1996-06-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Niederdruckentladungslampe
DE29616879U1 (de) * 1996-09-30 1998-01-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Niederdruckentladungslampe
JP2000173537A (ja) * 1998-09-29 2000-06-23 Toshiba Lighting & Technology Corp 低圧水銀蒸気放電灯および照明装置
DE102005046483A1 (de) * 2005-09-28 2007-03-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB863467A (en) * 1957-05-21 1961-03-22 Gen Electric Co Ltd Improvements in or relating to low pressure electric discharge lamps
US3252028A (en) * 1961-06-23 1966-05-17 Westinghouse Electric Corp High-output fluorescent lamp having means for maintaining a predetermined mercury vapor pressure during operation
US3898511A (en) 1974-04-22 1975-08-05 Gte Sylvania Inc Fluorescent lamp containing amalgam-forming material for reducing stabilization time
US5686795A (en) * 1995-10-23 1997-11-11 General Electric Company Fluorescent lamp with protected cathode to reduce end darkening
EP1063680A1 (fr) * 1998-03-20 2000-12-27 Matsushita Electric Industrial Co., Ltd. Lampe fluorescente
EP1253623A2 (fr) 2001-04-26 2002-10-30 General Electric Company Lampe fluorescente basse-tension
DE102006033672A1 (de) 2006-07-20 2008-01-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Beleuchtungssystem mit einer Entladungslampe und einem elektronischen Vorschaltgerät und Verfahren zum Betreiben eines Beleuchtungssystems
JP2008140699A (ja) * 2006-12-04 2008-06-19 Toshiba Lighting & Technology Corp 蛍光ランプおよび照明器具

Also Published As

Publication number Publication date
KR20140034780A (ko) 2014-03-20
DE102011006700A1 (de) 2012-10-04
CN103460333A (zh) 2013-12-18

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