WO2013017304A1 - Hochdruckentladungslampe mit zündhilfe - Google Patents
Hochdruckentladungslampe mit zündhilfe Download PDFInfo
- Publication number
- WO2013017304A1 WO2013017304A1 PCT/EP2012/059425 EP2012059425W WO2013017304A1 WO 2013017304 A1 WO2013017304 A1 WO 2013017304A1 EP 2012059425 W EP2012059425 W EP 2012059425W WO 2013017304 A1 WO2013017304 A1 WO 2013017304A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire
- discharge lamp
- pressure discharge
- lamp according
- indicates
- Prior art date
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
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
-
- 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
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
Definitions
- the invention relates to a high-pressure discharge lamp ge ⁇ Frankfurtss the preamble of claim 1.
- Such lamps are in particular high-pressure discharge lamps for general lighting or for photooptical purposes.
- the outer bulb discharge usually has a lower ignition voltage than the lamp.
- these clamping ⁇ voltages are still higher than the ignition voltages filled with radio-active Krypton85 lamps.
- the object of the present invention is to provide a high-pressure discharge lamp whose ignition is ensured by simple inexpensive means.
- An application is also possible for example in xenon high-pressure discharge lamps or mercury high-pressure discharge lamps.
- the invention relates to high-pressure discharge lamps with a discharge vessel made of quartz glass or ceramic, optionally with outer piston.
- the invention relates in particular to discharge lamps which are started with the aid of an ignition pulse in the amount of typically 4 to 5 kV without radioactive admixture.
- the invention is particularly applicable to general lighting discharge lamps, which typically have a gas-filled outer envelope and are designed to last 6000 hours or more.
- Such high-pressure discharge lamps are started by means of special ignitors.
- the ignition of the ignition device ⁇ are defined by appropriate standards.
- the Bedin ⁇ conditions in the discharge vessel (volume, electrode spacing, fill gas, filling pressure, Hg amount, amount and type of metal halides) must be coordinated so that the lamp ignites safely at the specified ignition conditions. Furthermore increases with increasing life the necessary voltage for ignition. This can result in old lamps not starting on conventional ignitors. The ignitability must, however, be guaranteed over the entire service life.
- the invention describes a solution that ensures a safe zuen ⁇ dung for high pressure discharge lamps.
- UV radiation is used for the reliable ignition of krypton85-free high-pressure discharge ⁇ lamps UV radiation.
- a discharge in an outer bulb can be used as a UV light source.
- insbesonde ⁇ re is a dielectric barrier discharge, in which only one auxiliary ignition in contact with the outer bulb gas is advantageous. It is advantageous for the ignition voltage of the outer bulb discharge when free electrons can be generated by field emission. For this purpose, high electric ⁇ cal fields must be generated on the Zündoselektrode.
- a further object of the invention is to produce field strength maxima in the outer piston in a cost-effective manner.
- a significant reduction of the ignition voltage in the outer bulb can be achieved by using the field emission of electrons from a Zündagiselektrode. For this purpose, the highest possible number of locations with high electric field strength must be generated on the ignition ⁇ auxiliary electrode.
- an outer bulb of the lamp is filled with a gas capable of forming a corona discharge, e.g. Ar, Xe, or even air, but also other gases or gas mixtures.
- a gas capable of forming a corona discharge e.g. Ar, Xe, or even air, but also other gases or gas mixtures.
- the filling pressure can be between 1 bar and 0.1 mbar.
- a discharge vessel may also be directly exposed to air, i. operated without outer bulb.
- a suitable structure of an arrangement according to the invention provides that an electrically conductive arrangement is attached to the outside of the discharge vessel as close as possible to the electrode having one or more very small radii or sharp edges and is electrically connected to the power supply of the other elec- trode (contacted variants ).
- the Zündysan extract can be electrically connected to a similar or similar arrangement on the other side of the discharge vessel without contact with one of the two current supply (capacitive coupled variant).
- a particularly simple form of the invention in the contacted variant provides for a thin wire with ignition aid to be attached to one end of the discharge vessel such that it is positioned as a turn or loop or a group thereof as close as possible to the first electrode, and a ver ⁇ thus tied second turn or loop or group thereof is connected to the power supply of the second electrode.
- a close contact of the bridge between the two groups in the central region of the discharge vessel is not necessary.
- a wire is positioned at both ends of the discharge vessel so that each end of the wire, as a turn or loop or a group thereof, is brought as close as possible to an electrode or feedthrough.
- an asymmetric structure is possible, which provides for only one side of the discharge vessel, an arrangement for forming the corona discharge and on the other hand as effective as possible capacitive coupling reali ⁇ Siert.
- the invention enables very simple technical Anordnun ⁇ conditions with which discharge lamps with the above-mentioned properties safely ignite igniters with a firing pulse of 3-5 kV. It is particularly advantageous in the case of sodium-containing lamps in the capacitively coupled variant.
- the starting aid according to the invention is significantly more effective than a similarly constructed conventional starting aid, since a corona discharge on the structure of a starting aid already forms at lower voltages than a dielectrically impeded discharge.
- the effectiveness of an ignition aid in crushed burners is often not very high, since the Zündosanowski must be led around the entire contusion and the pinch fills a large cross-sectional area, so that the induced electric fields are small. Melting is therefore more suitable.
- the presented invention makes it possible to selectively position an ignition aid in the vicinity of at least one film in the end of the discharge vessel, so that a comparatively large electric field is induced here.
- the distance between the electrode and the inner wall surface of the discharge vessel in the region of the starting aid is decisive for the effectiveness, since a discharge is induced in this region. In particular, in a discharge vessel made of quartz glass, however, this distance is difficult to produce reproducible. It follows, that also corresponds to the effectiveness of the ignition aid
- a discharge is generated outside the discharge vessel.
- the case relevant distance to the outer wall of the discharge vessel is easy to adjust and easy to keep production technology constant.
- the construction of the ignition aid is simple and relatively inexpensive, since, for example, only one wire is needed with quasi Cylind ⁇ -driven geometry.
- both the discharge vessel and the outer bulb can be produced without modification according to the conventional methods.
- the Zündosbauteil is arranged only at the ends of Entladungsgefä ⁇ SLI, so that it is not so high Temperaturbelas- is subjected to processing such as components which have contact with the discharge vessel in the central region. So that the material ⁇ selection is simplified.
- the emerging from the discharge vessel light is much less shielded than other Zündangeskonstrumenten.
- High-pressure mercury discharge lamps In addition, a field of application is the counter electrode or an external electrode ei ⁇ nes UV enhancer for such lamps.
- the ignition aid is a wire construction with a round, so cylindrical core wire, which is wrapped by a flattened wire as a sheath wire.
- the individual turns are spaced apart from each other with a defined pitch.
- a pitch s of the cladding wire is from 1 to 10 times, preferably two to five times, its width R.
- the application of the sheath wire to the core wire is done with known winding machines, which stand out by a plastic deformation during the winding process, the narrow sides of the applied to the core wire sheath wire from the core wire and thereby protrude from the surrounding environment of the ensemble core wire sheath wire.
- an already correspondingly preformed starting material for the sheathed wire can be applied to the core wire.
- the narrow sides or edges of the jacket wire are thus spaced from the core wire and are not there.
- the distance X should be as large as possible. Typically, values of X of 10 to 40% of B can be realized, where B is the thickness of the cladding wire.
- the radius of the edges of the starting material for the sheathed wire should be chosen as small as possible and preferably a value of at most 20% of the radius D / 2 of the core wire aufwei ⁇ sen, but not exceed a maximum of 10 ym.
- the advantages of this particularly preferred embodiment are that high electric field strengths can be achieved with a stable configuration. As a result, the ignition of the lamp is simplified and it suffice low ignition voltages. The Reliability of the ignition properties against given limits and against other process influences is increased. This type of ignition aid is very easy to machine, since the diameter of the core wire can be chosen to be large (typically 50 ym to 400 ym), without that the effect of Feldüberhöhung, which results from the sheath wire, is impaired.
- the machinability is good because the Vorpro ⁇ domestic product, ie the starting aid can be almost as radially symmetrical angese ⁇ hen and therefore like a simple round wire can be processed on conventional machines.
- a high-pressure discharge lamp having a starting aid and with egg ⁇ nem discharge vessel, the discharge vessel having two En ⁇ having seals in which electrodes and, if necessary, power supply lines are attached, characterized labeled in ⁇ characterized in that the ignition aid is a wire system consisting of a core wire and a cladding wire applied thereto, wherein the cladding wire is a flat pressed or flattened wire.
- High-pressure discharge lamp characterized ge ⁇ indicates that the wire system of the ignition aid is wound in egg ⁇ ner or more turns, in particular ⁇ special, at least one turn on at least one En ⁇ de discharge vessel is wound.
- High-pressure discharge lamp characterized in that the discharge vessel is surrounded by a Au ⁇ tkolben, wherein the ignition aid is housed in conjunctionkol ⁇ ben, and wherein the ignition aid comprises an electrode or a power supply.
- High-pressure discharge lamp according to claim 3 characterized ge ⁇ indicates that the outer bulb is filled with ionizable gas.
- High-pressure discharge lamp according to claim 1 characterized ge ⁇ indicates that the jacket wire has at least one narrow side or edge, which is ⁇ from the core wire, in particular two narrow sides or edges, both of which protrude from the core wire.
- High-pressure discharge lamp according to claim 3 characterized ge ⁇ indicates that the ignition aid has a UV enhancer with a container having an inner electrode, wherein the wire system of the ignition help as an externally attached to the container of the ignition aid counter electrode to the inner Elekt ⁇ serve, in particular the outer bulb the lamp is evacuated.
- High-pressure discharge lamp according to claim 1 characterized ge ⁇ indicates that the ignition aid comprises a material having a low electron work function.
- High-pressure discharge lamp according to claim 2 or 3 characterized in that the ignition aid is brought to ⁇ at least in the amount ei ⁇ ner film in the region of the end of the discharge vessel .
- High-pressure discharge lamp according to claim 3 characterized ge ⁇ indicates that the gas in the outer bulb has a cold ⁇ filling pressure of 0.1 mbar to 300 mbar, wherein the ignition aid in this gas generates a corona discharge, which emits UV radiation in the discharge vessel.
- High-pressure discharge lamp characterized ge ⁇ indicates that the ignition aid comprises two groups of Win ⁇ tions, in each case at least one turn on both ends of the discharge vessel, wherein the two groups of turns are connected to each other via an electrically conductive bridge.
- Fig. 1 is a high-pressure discharge lamp with ignition aid, first
- FIG. 2 is a detail view of an embodiment of a
- FIG. 5 shows a further embodiment of a starting aid
- FIG. 6 shows a high-pressure discharge lamp with UV enhancer below
- FIG. 7 shows an exemplary embodiment of a UV enhancer with electrode according to the invention in two variants (FIGS. 7a and 7b);
- FIG. 8 shows an embodiment of a xenon
- the discharge vessel 3 has a discharge vessel 3 made of quartz glass with two ends 4, wherein an outer bulb 5 is applied to the ends 4.
- the Entla ⁇ tion vessel 3 has outer leads 6, the contact electrodes 7 inside.
- the ends are fuses containing a foil 8.
- the discharge vessel 3 has a fuel ⁇ development of an ionizable gas, usually argon or Xe non, mercury and metal halides, as known per se.
- the outer bulb is filled with argon with 1 mbar to 200 mbar cold filling pressure.
- the ignition aid 2 is fastened in the form of two groups 10 of turns of a wire, for example comprising Mo or W or one of these metals, to the inner parts of the ends, which are formed as seals 11.
- the two Grup ⁇ pen 10 are connected to each other via a wire bridge 12.
- an alloy containing iron in particular an alloy of Fe / Cr / Al.
- the ignition aid 2 is designed in principle as a wire relative to ⁇ least one end of the discharge vessel has a means that excessive electrical field strength.
- Figure 2 shows an embodiment of a starting aid 2, where ⁇ is flat rolled at the wire 15 and thereby forms a lateral edge 16 for the Zündüberhöhung.
- the wire 15, as shown is additionally twisted in itself.
- This embodiment shows high stability and zündatende We ⁇ kung, however, it is of the installation and processing of the wire ago relatively expensive.
- Another embodiment is a wire having a rectangular cross-section and having a relatively small radius of curvature at the edges.
- embossing ⁇ structure on a portion of the starting aid.
- This can be applied inexpensively in the form of a knurling, a scraping, see the technique as described in DE202006016189U1, sandblasting or another method of surface structuring.
- care must be taken that no appreciable local cross ⁇ section reduction of the wire and thus a reduced mechanical stability is associated with it.
- the special proposal Part of this process of embossing is that it is a well-known in itself technology that is well reproducible and can be tailored to the specific requirement accurately.
- Figure 3 shows another embodiment of a Zündhil ⁇ fe 2, namely a wire 19, which acts as a quasi core wire, with a fine wire 20 as a sheath wire to umdietaryin.
- the fine wire 20 ensures the small radii of curvature and thus high field strengths without adversely affecting the mechanical properties of the ignition aid.
- Such a construction is therefore very suitable for the groups of turns.
- the diameter of the jacket wire 20 is advantageously in the range 10 to 150 ym.
- the diam ⁇ ser of the core wire 19, on which the jacket wire is applied, is typically in a range of 0.1 to 3 mm.
- the core wire or sheath wire can be rolled into a thin film, which then has a lenticular cross-section.
- the ignition aid 2 is a wire 19 which is provided with at least one flattened portion 25 (FIG. 4).
- twisting or twisting of wires are possible.
- thin rolled sheets with correspondingly sharp edges can also be twisted.
- the exposed field exaggeration by burrs is prinzi ⁇ piell applicable to all metals.
- metals or compounds which are characterized by a low work function from ⁇ , see for example US 5,911,919.
- the sheath wire consists of a material with a low work function or is coated therewith.
- Emissive materials are in particular carbides or borides of Hf, Zr, Ti, in particular as a layer on wires or introduced into a matrix based on metals such as W, Ta, Re or even Mo.
- a typical length of such a portion 25 is 0.5 to 5 mm.
- the ignition aid is purely capacitive.
- the effective structural ⁇ structure is integrally ⁇ placed as close as possible to the discharge vessel, to be precise preferably in the area of the sheets at the ends of the discharge vessel.
- the effective structure may be in the region of a film, alternatively in the region of both films or extending over the entire length of the ignition aid.
- Figure 5 shows an embodiment of a starting aid 2, wherein the core wire is a round wire 60 in which the 61 basically comprises Man ⁇ teldraht a rectangular cross section. He has narrow sides 65 and broadsides 66 with edges 62 in between and is deformed so that the edges 62 reach as large a distance X from the core wire. In order to can be a very large Zündaushöhung reach because the edges are outside of the controlled by the core wire electric field.
- the maximum distance M of the edges is on the order D of the diameter of the core wire. If a film or rolled wire is used as a sheath wire, the narrow sides 65 and edges 62 of the sheath wire are still extra bent away from the core wire 60. Typically, with this technique, a distance M of about 0.5 to 1.5 D can be achieved. In addition, the thickness B of the sheath wire should not be too large, so that the sheath wire can be bent well or deformed.
- the sheath wire has a substantially rectangular cross-section, at least approximately, with a maximum thickness B of about 50 to 100 ym and a maximum width R of 100 up to 300 yards.
- the approximate rectangular cross-section of the cladding wire is achieved in particular by flattening a wire, in which case only one edge instead of two edges 62 on the
- FIG. 6 shows a further application of the starting aid in a high-pressure discharge lamp 35, in which a ceramic discharge vessel 36 is provided with two ends 37, which are designed as capillaries. An outer bulb 38 surrounds the discharge vessel with clearance.
- the ignition aid itself is here a UV enhancer 40, which is mounted in the vicinity of a capillary 37.
- the UV enhancer works according to the principle of dielectrically impeded discharge with an inner electrode, wherein an external counterelectrode 39 extends in the direction of UV enhancer 40 from a stirrup wire 31 of the frame that supports the discharge vessel.
- the counter electrode is a foil band 39, which circumscribes the UV enhancer and thereby creates a semi ⁇ circular contact zone.
- FIG. 7a shows a first exemplary embodiment of the UV enhancer 40. It has a container 41 made of quartz glass.
- the container 41 is can-shaped, with a dome 42 and a pinch 43.
- the container is filled with argon or other UV-emitting substance, as known per se.
- a feed line 45 which ends in egg ⁇ ner foil 46 made of molybdenum.
- the film 46 extends into the interior of the container and forms an internal electrode 47.
- a counterelectrode 50 is mounted on the outside of the container, essentially a core wire 51 with jacket wire 52, here flattened.
- a structure as shown in Figure 5 is provided ⁇ represent preferred.
- FIG. 7b A similar embodiment of a UV enhancer is shown in FIG. 7b.
- the container 41 is made of tempered glass and the inner electrode 53 is pin-shaped. It is directly connected to the line ⁇ 45.
- FIG 8 shows a high-pressure xenon discharge lamp 70 with egg ⁇ nem discharge vessel 71 made of hard glass and two ends 72, which are designed as inclusions.
- An electrode system 73 is guided by the melt to the outside. It ends inside on two electrodes 74. At both ends sit metallic sockets 75.
- An ignition aid 2 is here designed as a loop 76 on the first end 72, wherein a second loop 77 is seated on the second end 72. Both loops are connected by a bridge 79.
- This can be a simple wire, while the loops themselves, in particular according to the Ausure ⁇ approximately examples of Figure 3, 4, or 5 are executed, thus ensuring a ZündGermanhöhung.
- the galvanic coupling is achieved by a wire 78 which connects a loop 77 with the associated base 75.
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- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/236,332 US9013103B2 (en) | 2011-08-01 | 2012-05-22 | High-pressure discharge lamp having a starting aid |
JP2014523238A JP5837692B2 (ja) | 2011-08-01 | 2012-05-22 | 始動補助機構付き高圧放電ランプ |
CN201280036667.6A CN103703539B (zh) | 2011-08-01 | 2012-05-22 | 带有辅助点火装置的高压放电灯 |
DE112012003196.2T DE112012003196A5 (de) | 2011-08-01 | 2012-05-22 | Hochdruckentladungslampe mit Zündhilfe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201120103945 DE202011103945U1 (de) | 2011-08-01 | 2011-08-01 | Hochdruckentladungslampe mit Zündhilfe |
DE202011103945.9 | 2011-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013017304A1 true WO2013017304A1 (de) | 2013-02-07 |
Family
ID=45116281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/059425 WO2013017304A1 (de) | 2011-08-01 | 2012-05-22 | Hochdruckentladungslampe mit zündhilfe |
Country Status (5)
Country | Link |
---|---|
US (1) | US9013103B2 (de) |
JP (1) | JP5837692B2 (de) |
CN (1) | CN103703539B (de) |
DE (2) | DE202011103945U1 (de) |
WO (1) | WO2013017304A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HUE025158T2 (en) * | 2011-07-28 | 2016-02-29 | Osram Gmbh | High pressure discharge lamp with auxiliary ignition electrode |
DE102013222577A1 (de) | 2012-11-07 | 2014-05-08 | Osram Gmbh | Hochdruckentladungslampe mit Zündhilfe |
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2011
- 2011-08-01 DE DE201120103945 patent/DE202011103945U1/de not_active Expired - Lifetime
-
2012
- 2012-05-22 JP JP2014523238A patent/JP5837692B2/ja active Active
- 2012-05-22 DE DE112012003196.2T patent/DE112012003196A5/de not_active Withdrawn
- 2012-05-22 WO PCT/EP2012/059425 patent/WO2013017304A1/de active Application Filing
- 2012-05-22 US US14/236,332 patent/US9013103B2/en active Active
- 2012-05-22 CN CN201280036667.6A patent/CN103703539B/zh active Active
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DE202010011029U1 (de) * | 2010-08-09 | 2010-10-21 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe mit Zündhilfe |
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Publication number | Publication date |
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JP5837692B2 (ja) | 2015-12-24 |
CN103703539A (zh) | 2014-04-02 |
DE112012003196A5 (de) | 2014-04-30 |
US20140167606A1 (en) | 2014-06-19 |
DE202011103945U1 (de) | 2011-11-03 |
CN103703539B (zh) | 2016-08-17 |
US9013103B2 (en) | 2015-04-21 |
JP2014524639A (ja) | 2014-09-22 |
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