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WO2010112315A1 - Lampe électrique à ampoule externe - Google Patents

Lampe électrique à ampoule externe Download PDF

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Publication number
WO2010112315A1
WO2010112315A1 PCT/EP2010/053135 EP2010053135W WO2010112315A1 WO 2010112315 A1 WO2010112315 A1 WO 2010112315A1 EP 2010053135 W EP2010053135 W EP 2010053135W WO 2010112315 A1 WO2010112315 A1 WO 2010112315A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer bulb
electric lamp
lamp according
bulb
constriction
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.)
Ceased
Application number
PCT/EP2010/053135
Other languages
German (de)
English (en)
Inventor
Lambert Frye
Claus Pfaller
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
Osram GmbH
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 GmbH filed Critical Osram GmbH
Publication of WO2010112315A1 publication Critical patent/WO2010112315A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • 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
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to an electric lamp with an outer bulb according to the preamble of claim 1.
  • Such lamps are in particular high-pressure discharge lamps or halogen incandescent lamps.
  • DE-A 103 25 552 describes a high-pressure discharge lamp with an outer bulb, in which an outer bulb is applied to an inner bulb.
  • the outer bulb has a small constriction on one side. This serves to fix a getter in the outer bulb.
  • the object of the present invention is to provide an electric lamp with outer bulb, are largely avoided in the high energy losses in the outer bulb.
  • the surrounding atmosphere is air here. This seal is usually a meltdown or pinch.
  • the shape of the outer bulb is such that a radially encircling constriction of the outer bulb is provided. This is to be installed in the area of the sealing of the inner piston. Preferably, the center of the constriction is attached at the level of the inner end of the film in the seal of the inner piston.
  • the constriction should preferably be designed so that here the distance TF between the discharge vessel and outer bulb in the range of 0.5 mm ⁇ TF ⁇ 2 mm.
  • the outer bulb has preferably two symmetrical spaced constrictions to its center. It depends less on the concrete shape of the constriction than on the depth F.
  • the seal is preferably a meltdown. In the case of a pinch, this dimension applies to the broad side of the pinch.
  • the width of the constriction should correspond at most to the depth TF at the most, rather less.
  • the outer bulb preferably has two symmetrical constrictions. It depends less on the concrete shape of the constriction than on the depth F.
  • the constriction is preferably radially symmetrical and thus creates all-round symmetrical temperature conditions during a melting process. In particular, when using bruises but the constriction can also be designed less symmetrical.
  • the discharge vessel during operation is much more isothermal than without.
  • a significant improvement of the isotherm is achieved when the depth F is at least 40%, good conditions can be achieved with 50 to 60%.
  • the discharge vessel is characterized even better and more targeted and isothermal heated, that on the area of the outer bulb, which lies between the two constrictions, a reflection layer for the heat radiation is applied.
  • a reflection layer for the heat radiation is applied on the area of the outer bulb, which lies between the two constrictions.
  • an infrared coating IRC is used as known per se, this reflects the heat radiation back, while the visible radiation can pass through almost unhindered.
  • the center region of the outer bulb is designed so that it is adapted to the contour of the inner piston. In this way, the isotherm of the inner piston is further improved. The reflection of the heat radiation then heats the discharge vessel more effectively.
  • both measures are mixed together. It is particularly sufficient if only one edge zone of the central region is provided with the coating, because the coldest regions are at the ends. In particular, a rule of thumb is that the marginal zones each make up one-third of the axial length of the central region.
  • a normal reflection layer can be used, but this is accompanied by a certain loss of light.
  • the highest efficiencies lm / W
  • they are at least 10% higher than normal lamps without constriction of the outer bulb.
  • the outer bulb filling can optionally be vacuum, nitrogen (50 mbar - 800 mbar), argon (50 mbar - 800 mbar) or noble noble gases and their mixtures or air (normal pressure, open system).
  • Typical applicable IRC layers are, as is known, systems of at least 20 pairs of layers, typically 50 to 90, of alternating high and low refractive index layers of SiO 2 and tantalum pentoxide or niobium pentoxide.
  • the shape of the constriction can in particular be chosen so that stresses between the discharge vessel and outer bulb are largely avoided.
  • Such voltages are usually the result when a discharge vessel (in particular of quartz glass) and an outer bulb (in particular of quartz glass or hard glass ????) are directly connected to one another at two ends by fusion, etc. Both during manufacture and operation, very high stresses occur in the glass, which can easily lead to total failure.
  • Typical are a ring jump on the outer bulb or a shank tear at the discharge vessel. With shaft here is meant the seal.
  • the membrane effect can be achieved by steep, thin-walled end faces (essentially perpendicular to the lamp axis) on the outer bulb or by specific punctures in the outer bulb.
  • the constriction is designed as a puncture. It then lies in the middle region of the outer bulb and accordingly has two side walls approximately perpendicular to the longitudinal axis of the lamp and a base therebetween. The side walls are at production position as a puncture, curl oa. noticeably thinner than the other wall thickness of the outer bulb and therefore have the desired membrane effect.
  • FIG. 1 shows a first embodiment of a metal halide lamp with a straight outer bulb
  • FIG. 2 shows an exemplary embodiment of a halogen incandescent lamp
  • Fig. 3 shows an embodiment of a metal halide lamp with a molded outer bulb
  • FIG. 4 shows a further embodiment of a metal halide lamp with a shaped outer bulb.
  • Figure 5 shows an embodiment according to the prior art
  • FIG. 6 shows an embodiment of a metal halide lamp with constrictions of the outer bulb shaped as punctures.
  • the discharge vessel 1 shows a metal halide lamp 1. It consists of a discharge vessel 2 made of quartz glass, which is held along a longitudinal axis A in an outer bulb 3 made of quartz glass.
  • the discharge vessel 2 consists of a bulbous central part 4 with electrodes 15 mounted therein and two seals 5 attached thereto, which are designed as melts.
  • the outer bulb 3 has centrally a maximum diameter at the level of the discharge vessel. It has two ends 6 of reduced diameter, which extend in the direction of the seals 5. In the concrete embodiment, the end 6 of the outer bulb sits directly on the seal.
  • the seals 5 have outside a tubular extension part 7, in which a base part 18 is inserted.
  • the seals 5 each include a foil 8 to which the shaft of the electrode 15 is fixed inwardly and a power supply 16 is mounted outwardly.
  • the discharge vessel has, for example, a filling of metal halides as known per se.
  • the outer bulb 3 has, in principle, a depth T up to the melting point 5. It also has a radial constriction 10 approximately at the level of the inward end of the foil 8, which may be approximately V-shaped, U-shaped or parallel in cross-section , It has two sloping or nearly vertical side walls and a base part between the side walls. The smallest distance TF is reached at the base part and is at most 50% of the value of T.
  • the outer bulb has two symmetrical constrictions of this kind, which reduce the convection and thus improve the isotherm of the discharge vessel.
  • Figure 2 shows a halogen incandescent lamp 20 which is designed quite similar, but it has no electrodes, but a luminous element 21 in the interior of the inner piston.
  • FIG. 3 shows an exemplary embodiment of a lamp 30 in which the central region 31 of the outer bulb, that is to say the region between the two constrictions 10, is adapted in its contour to that of the inner bulb 2.
  • the distance between the two pistons 2, 31 is chosen as narrow as possible, so that the contour begins at the base 11 of the constriction.
  • FIG. 4 shows an exemplary embodiment similar to FIG. 3, but in each case a radially encircling edge zone 41 is coated at both ends of the central region 31 with an infrared-reflecting coating 42 of interference filter layers (IRC coating).
  • IRC coating interference filter layers
  • the axial length of the two edge zones is preferably maximum one third of the axial length of the entire center region 31. Typically, their length is 20 to 30% each.
  • FIG. 5 shows an outer bulb 45 whose end regions have been shaped by means of a puncture, but without constrictions. This achieves a membrane effect on the outer edge.
  • a significantly better membrane effect is achieved according to FIG. 6, when the outer bulb is provided with two constrictions 47 according to the invention.
  • These constrictions can be formed as punctures, or by curling or molding, in particular with side walls 49 and base 48.
  • the constriction is substantially preferably U- or V-shaped.
  • the side walls 49 are preferably considerably thinner than the wall thickness in the cylindrical region 50 in the middle of the outer bulb.
  • the discharge vessel has, for example, a filling of metal halides as known per se. Furthermore, two electrodes are arranged in the discharge vessel, between which the discharge arc burns.
  • An electric lamp having an elongated inner piston, a central part sealed on two sides with seals, the seals including foils, and wherein the inner piston has a longitudinal axis, and wherein a bulb is housed in the inner bulb, and wherein the inner bulb is surrounded by an outer bulb, characterized in that the outer bulb has two constrictions in the radial direction, which are each arranged within the outer end of the film, so that between the constrictions is a central region of the outer bulb.
  • An electric lamp according to claim 1 characterized in that the constriction is arranged axially so that it covers the front, the discharge end facing the film, and in particular its center is equal to this end.
  • An electric lamp according to claim 1 characterized in that the depth of the Einschürung corresponds to at least 50% of T, when T is the largest distance between the outer bulb and the seal.
  • Electric lamp according to claim 1 characterized in that the minimum distance between the seal and constriction is 0.5 to 2 mm.
  • Electric lamp according to claim 1 characterized in that the seal is a meltdown. 6.
  • An electric lamp according to claim 1 characterized in that the contour of the inner piston is bulbous.
  • An electric lamp according to claim 1 characterized in that the center region is provided at least in sections with an infrared-reflecting coating.
  • An electric lamp according to claim 1 characterized in that the constriction is formed as a recess, wherein the wall thickness in the region of the constriction is less than the wall thickness in the central region.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne une lampe électrique (1) comportant une ampoule interne (2) fermée sur deux côtés par des éléments d'étanchéité (5), l'ampoule interne présentant un axe de lampe, contenant un milieu luminescent, et étant entourée d'une ampoule externe (3) pourvue de deux extrémités en liaison directe avec les éléments d'étanchéité de l'enceinte à décharge. Selon l'invention, l'ampoule externe comporte deux étranglements (10) destinés à éviter la convection.
PCT/EP2010/053135 2009-04-02 2010-03-11 Lampe électrique à ampoule externe Ceased WO2010112315A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009016057.4 2009-04-02
DE200910016057 DE102009016057A1 (de) 2009-04-02 2009-04-02 Elektrische Lampe mit Außenkolben

Publications (1)

Publication Number Publication Date
WO2010112315A1 true WO2010112315A1 (fr) 2010-10-07

Family

ID=42133414

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/053135 Ceased WO2010112315A1 (fr) 2009-04-02 2010-03-11 Lampe électrique à ampoule externe

Country Status (2)

Country Link
DE (1) DE102009016057A1 (fr)
WO (1) WO2010112315A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010028472A1 (de) * 2010-05-03 2011-11-03 Osram Gesellschaft mit beschränkter Haftung Edelgas - Kurzbogen - Entladungslampe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580989A (en) * 1982-08-18 1986-04-08 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating and constructing same
JPH0757699A (ja) * 1993-08-06 1995-03-03 Matsushita Electron Corp メタルハライドランプ
DE69511987T2 (de) * 1994-05-19 2000-03-16 Koninklijke Philips Electronics N.V. Gesockelte hochdruckentladungslampe
DE10325552A1 (de) 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Außenkolben und zugehöriger Trägerkörper
DE10325554A1 (de) 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zur Herstellung einer elektrischen Lampe mit Außenkolben
DE102005035779A1 (de) * 2005-07-29 2007-02-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Aussenkolben

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580989A (en) * 1982-08-18 1986-04-08 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating and constructing same
JPH0757699A (ja) * 1993-08-06 1995-03-03 Matsushita Electron Corp メタルハライドランプ
DE69511987T2 (de) * 1994-05-19 2000-03-16 Koninklijke Philips Electronics N.V. Gesockelte hochdruckentladungslampe
DE10325552A1 (de) 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Außenkolben und zugehöriger Trägerkörper
DE10325554A1 (de) 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zur Herstellung einer elektrischen Lampe mit Außenkolben
EP1492146A2 (fr) * 2003-06-05 2004-12-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Procédé pour la fabrication d'une lampe électrique avec ampoule exterieure
DE102005035779A1 (de) * 2005-07-29 2007-02-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Aussenkolben

Also Published As

Publication number Publication date
DE102009016057A1 (de) 2010-10-07

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