EP2297772B1 - Lampe à décharge à barrière diélectrique dans un agencement coaxial à double tube avec piège à gaz - Google Patents

Lampe à décharge à barrière diélectrique dans un agencement coaxial à double tube avec piège à gaz Download PDF

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Publication number
EP2297772B1
EP2297772B1 EP08775080A EP08775080A EP2297772B1 EP 2297772 B1 EP2297772 B1 EP 2297772B1 EP 08775080 A EP08775080 A EP 08775080A EP 08775080 A EP08775080 A EP 08775080A EP 2297772 B1 EP2297772 B1 EP 2297772B1
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EP
European Patent Office
Prior art keywords
tube
getter
lamp according
discharge
outer tube
Prior art date
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Active
Application number
EP08775080A
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German (de)
English (en)
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EP2297772A1 (fr
Inventor
Oliver Rosier
Axel Hombach
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Osram GmbH
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Osram GmbH
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Publication date
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Publication of EP2297772A1 publication Critical patent/EP2297772A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around 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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
    • 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

Definitions

  • the invention is based on a dielectric barrier discharge lamp with a discharge vessel in coaxial double tube arrangement, i. an inner tube is coaxially disposed within an outer tube. Inner tube and outer tube are connected to each other and form the gas-tight discharge vessel.
  • the discharge space enclosed by the discharge vessel thus extends between the inner and outer tubes and is filled with a discharge medium which typically contains one or more noble gases, for example xenon.
  • This type of discharge lamp typically has a first electrode disposed within the inner tube and a second electrode disposed on the outer surface of the outer tube. Both electrodes are thus outside the discharge vessel. It is therefore a two-sided dielectrically impeded discharge.
  • xenon excimers In a dielectric barrier discharge with, for example, the noble gas xenon as the discharge medium, xenon excimers (Xe 2 *) are generated which emit electromagnetic radiation with wavelengths in the region of about 172 nm when returning from the excited state to the ground state.
  • Impurities for example oxygen or hydrogen, in the discharge medium reduce the efficiency of the useful radiation generation.
  • part of the electrical excitation power goes into the unwanted excitation the atomic and / or molecular components of the impurities.
  • the impurities cause some of the excimer to return to the ground state without radiation.
  • This type of lamp is used in particular for UV irradiation in process technology, for example for surface cleaning and activation, photolytics, ozone generation, drinking water purification, metallization, and UV curing.
  • the term radiator or UV lamps is also common.
  • the font EP 0 607 960 A1 discloses a dielectric barrier discharge lamp in coaxial double tube arrangement.
  • a getter material is arranged either in a one-sided extension of the annular gap-shaped discharge space (FIGS. 1-3), a flat, circular extension of the discharge vessel (FIG. 4) or in a separate vessel (FIG Discharge space is connected.
  • measures are provided to prevent the getter material from inadvertently entering the discharge space, for example by connecting the getter space from the discharge space via a narrowed portion of the vessel.
  • the problem is that parasitic discharges can form in the area of the getter space due to the proximity of the getter space to the discharge space. The parasitic discharges worsen the efficiency of the radiator.
  • the object of the present invention is to provide a dielectric barrier discharge lamp in coaxial double tube arrangement with improved arrangement of a getter material.
  • a dielectric barrier discharge lamp in a coaxial double tube arrangement with a discharge vessel comprising an outer tube and an inner tube, wherein the inner tube coaxially disposed within the outer tube, the inner tube and the outer tube are gas-tightly interconnected, whereby between inner and Outer tube, a discharge space filled with a discharge medium is formed, an outer electrode disposed on the outer side of the outer tube, an inner electrode disposed within the inner tube, a getter material, which is in contact with the discharge medium, characterized in that the inner tube is shorter as the outer tube, the inner tube and the outer tube are gas-tightly connected to each other at their respective one end, the outer tube is gas-tightly closed at its other end, the inner tube projecting into the outer tube comprises: a first tube section - the inner electr odenrohr -, in which the inner electrode is arranged, a second pipe section - the getter pipe -, in which the getter material is arranged, a partition which separates the two pipe sections gas-tight
  • the getter space is limited to an area close to the axis, i. is not arranged in the extension of the annular gap-shaped discharge space.
  • a getter tube provided for receiving the getter material coaxially adjoins the inner electrode tube provided for receiving the inner electrode, but is separated from it gas-tight by a partition wall.
  • the way from the getter material to the outer electrodes is relatively long. Due to the long path between getter material and electrodes parasitic discharges are avoided or at least significantly reduced. Due to the partition wall between the getter tube and the inner electrode tube, the gettering space formed by the getter tube and consequently also the discharge space communicating with the gettering space via the getter tube opening is sealed to the outside in a gastight manner.
  • the getter tube may be formed by extending the inner tube beyond the length of the inner electrode.
  • the getter tube forming the getter space and the inner electrode tube receiving the inner electrode are functionally different and separated by the partition portions of the same one-piece inner tube.
  • the getter tube may be formed by a separate tube which adjoins the end of the inner electrode tube protruding into the outer tube, ie in this case the inner tube comprises two separate tube parts: namely the inner electrode tube and the getter tube.
  • the two tube parts gas-tight separating partition is formed by a corresponding gas-tight closed end of one of the two tube parts. That is, the partition wall is formed for example by the gas-tight closed end of the inner electrode tube (8), to which the getter tube is attached and thus connected gas-tight. But it can also reverse the first getter tube closed at one end and then attached and connected with this closed end to the open end of the inner electrode tube.
  • the diameter of the inner electrode tube and the diameter of the getter tube may be the same or different.
  • the length of the getter tube in the axial direction is adjusted so that a sufficient amount of getter material can be absorbed.
  • the getter tube should not be too long, otherwise the radiating portion - this extends only to the area with the inner electrode - based on the total length of the radiator is reduced too much. In practice, depending on the total length of the radiator, lengths in the range between approximately 0.5 cm and 5 cm have proven suitable for the getter tube.
  • the getter material may for example be applied to at least a part of the inner surface of the getter tube, for example by barium vapor deposition.
  • the getter material can also be arranged in another way in the getter tube be, for example, clamped in strip form in Getterrohr or the like.
  • barium other suitable getter materials come into consideration, for example, porous or powdery oxides, nitrides and carbides and titanium, tantalum, aluminum, zirconium and combinations thereof.
  • the diameter of the opening of the getter tube is equal to or greater than the distance between the outside of the inner tube and the inside of the outer tube defining the distance of the discharge.
  • the free end of the inner tube for example in the getter tube, with a suitable means, e.g. support a matching retaining washer between inner and outer tube.
  • a suitable means e.g. support a matching retaining washer between inner and outer tube.
  • the retaining plate In order not to interfere with the replacement of the discharge medium and thus the getter, but the retaining plate must have corresponding openings, such as holes, slots or the like.
  • the longitudinal discharge vessel of the lamp 1 consists of an outer tube 2 and an inner tube 3 in coaxial double tube arrangement, whereby the longitudinal axis L of the discharge vessel is defined.
  • the typical length of the outer tube 2 is depending on the application between about 10 and 250 cm.
  • the outer tube 2 has a typical outer diameter of 44 mm and a wall thickness of 2 mm.
  • the inner tube 3 has a typical outer diameter of 20 mm and a wall thickness of 1 mm.
  • Both tubes 2, 3 consist of UV radiation permeable quartz glass.
  • the discharge vessel is closed at its two end faces such that an elongated, annular gap-shaped discharge space 4 is formed.
  • the discharge vessel has at one end a suitably shaped, annular vessel section 5, which connects there the corresponding ends of the inner and outer tubes. At its other end, the discharge vessel is closed with a circular vessel section 6, which adjoins there to the corresponding end of the outer tube 2.
  • a pumping tube (not shown) attached, with the help of the discharge space. 4 first evacuated and then filled with 15 kPa xenon as a discharge medium. Then the pump tube is melted off.
  • the inner tube 3 ends at a distance a of about 1 cm in front of the circular vessel section 6 at the end of the outer tube 2.
  • the inner tube 3 consists of a first functional section, which serves to receive an inner electrode 7, the inner electrode tube 8.
  • the getter tube 10 closes a second functional section, which serves to receive a getter material 9, the getter tube 10.
  • inner electrode tube 8 and getter tube 10 are separated by a partition wall 11.
  • This partition 11 also closes off the discharge vessel in this region of the inner tube 3 gas-tight.
  • the getter tube 10 is open, so that the discharge medium from the discharge space 4 can get into the getter tube 10 and come into contact with the getter material 9.
  • the getter material 9 is made of barium and is evaporated on the inside of the getter tube 10 including the facing side of the partition wall 11.
  • the length d of the getter tube 10 is about 1 cm.
  • the inner diameter D is about 18 mm and is thus greater than the defined by the distance between the outside of the inner tube 3 and the inside of the outer tube 2 impact distance G, which is about 10 mm.
  • a wire mesh 12 is wound, which forms the outer electrode of the lamp 1.
  • the inner electrode 7 is formed as a slotted metal tube and consists of a 0.1 mm thick metal sheet, preferably VA sheet.
  • the retaining disc has a central bore, so that it fits on the inner tube.
  • the outer diameter of the retaining washer is also sized so that the retaining washer just fits between the inner and outer tube.
  • the retaining plate with suitable openings, such as holes, slots, etc. provided.
  • the radiator can be provided with a base at least at one end, preferably at the end with the getter chamber, or at both ends (not shown).

Claims (12)

  1. Lampe à décharge à barrière diélectrique (1) dans un agencement coaxial à double tube avec
    o une enceinte de décharge qui comprend
    - un tube extérieur (2) et un tube intérieur (3),
    - le tube intérieur (3) étant agencé coaxialement à l'intérieur du tube extérieur (2),
    - le tube intérieur (3) et le tube extérieur (2) étant reliés entre eux de manière étanche au gaz, formant ainsi un espace de décharge (4) entre les tubes intérieur et extérieur, qui est rempli d'un milieu de décharge,
    o une électrode extérieure (12) qui est agencée sur la face externe du tube extérieur (2),
    o une électrode intérieure (7) qui est agencée à l'intérieur du tube intérieur (2),
    o un matériau getter (9) qui est en contact avec le milieu de décharge,
    caractérisée en ce que
    o le tube intérieur (3) est plus court que le tube extérieur (2),
    o le tube intérieur (3) et le tube extérieur sont reliés entre eux de manière étanche au gaz à l'une de leurs extrémités respectives,
    o le tube extérieur (2) est obturé de manière étanche au gaz à son autre extrémité,
    o le tube intérieur (3) pénétrant dans le tube extérieur (2) comprend :
    - un premier tronçon tubulaire - le tube d'électrode intérieur (8) - dans lequel est agencée l'électrode intérieur (7),
    - un deuxième tronçon tubulaire - le tube getter (10)
    - dans lequel est agencé le matériau getter (9),
    - une cloison de séparation (11) qui sépare les deux tronçons tubulaires l'un de l'autre de manière étanche au gaz.
  2. Lampe selon la revendication 1, dans laquelle le tube intérieur (3) avec les deux tronçons tubulaires - le tube d'électrode intérieur (8) et le tube getter (10) - est formé d'une seule pièce.
  3. Lampe selon la revendication 1, dans laquelle le tube getter (10) est réalisé par un tube séparé qui est coaxialement adjacent à l'extrémité du tube d'électrode intérieure (8) pénétrant dans le tube extérieur (2), et dans laquelle la cloison de séparation (11) est réalisée par l'extrémité correspondante obturée de manière étanche au gaz du tube getter (10) ou du tube d'électrode intérieure (8).
  4. Lampe selon l'une des revendications précédentes, dans laquelle le diamètre de l'ouverture (D) du tube getter (10) est de même dimension ou plus grand que l'intervalle définissant la distance d'isolement (G) de la décharge entre la face externe du tube intérieur (3) et la face interne du tube extérieur (2).
  5. Lampe selon l'une des revendications précédentes, dans laquelle au moins une partie de la surface interne du tube getter (10) est munie du matériau getter.
  6. Lampe selon l'une des revendications précédentes, dans laquelle les diamètres du tube d'électrode intérieur (8) et du tube getter (10) sont différents.
  7. Lampe selon l'une des revendications précédentes, dans laquelle la longueur du tube getter (10) dans le sens de l'axe longitudinal de l'enceinte de décharge est comprise entre 0,5 cm et 5 cm.
  8. Lampe selon l'une des revendications précédentes, dans laquelle le tube intérieur est supporté à l'aide d'un moyen de retenue.
  9. Lampe selon la revendication 8, dans laquelle le moyen de retenue est disposé dans la zone du tube getter.
  10. Lampe selon l'une des revendications 8 ou 9, dans laquelle le moyen de retenue est un disque de retenue de forme annulaire qui s'étend entre la face externe du tube intérieur et la face interne du tube extérieur.
  11. Lampe selon la revendication 10, dans laquelle le disque de retenue présente outre un perçage centré au moins une autre ouverture.
  12. Lampe selon l'une des revendications précédentes, dans laquelle le matériau getter comprend les éléments suivants, seuls ou en combinaison : oxydes poreux ou pulvérulents, nitrures et carbures ainsi que baryum, titane, tantale, aluminium, zirconium.
EP08775080A 2008-07-15 2008-07-15 Lampe à décharge à barrière diélectrique dans un agencement coaxial à double tube avec piège à gaz Active EP2297772B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/059220 WO2010006642A1 (fr) 2008-07-15 2008-07-15 Lampe à décharge à barrière diélectrique dans un agencement coaxial à double tube avec piège à gaz

Publications (2)

Publication Number Publication Date
EP2297772A1 EP2297772A1 (fr) 2011-03-23
EP2297772B1 true EP2297772B1 (fr) 2012-02-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08775080A Active EP2297772B1 (fr) 2008-07-15 2008-07-15 Lampe à décharge à barrière diélectrique dans un agencement coaxial à double tube avec piège à gaz

Country Status (8)

Country Link
US (1) US8174191B2 (fr)
EP (1) EP2297772B1 (fr)
JP (1) JP5165108B2 (fr)
KR (1) KR101216481B1 (fr)
CN (1) CN102084456B (fr)
AT (1) ATE545947T1 (fr)
TW (1) TWI467630B (fr)
WO (1) WO2010006642A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8399869B2 (en) * 2008-12-11 2013-03-19 Osram Gesellschaft Mit Beschraenkter Haftung UV luminaire having a plurality of UV lamps, particularly for technical product processing
WO2012127484A1 (fr) 2011-03-24 2012-09-27 Yogesh Chunilal Rathod Système et procédé permettant de gérer, contrôler, suivre, mettre à jour, mesurer et faciliter le maintien du statut et de l'état d'un utilisateur
US9368338B2 (en) * 2011-06-16 2016-06-14 Mocon, Inc. Gas discharge lamp with an axially extending strip of getter and method of manufacture
JP6365096B2 (ja) * 2014-08-07 2018-08-01 ウシオ電機株式会社 紫外線照射式オゾン生成装置
JP6662238B2 (ja) * 2015-10-19 2020-03-11 東芝ライテック株式会社 多重管放電ランプの梱包構造および多重管放電ランプ梱包体
USD797984S1 (en) 2016-03-24 2017-09-19 Mocon, Inc. UV lamp
CN112142271A (zh) * 2020-10-26 2020-12-29 西北农林科技大学 一种垃圾渗滤液全量化处理系统、方法及应用
US11037778B1 (en) 2021-01-14 2021-06-15 Mocon, Inc. UV lamp
WO2023217824A1 (fr) 2022-05-12 2023-11-16 Signify Holding B.V. Lampe de désinfection avec réflecteur

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06994A (ja) * 1992-06-18 1994-01-11 Tokyo Electric Co Ltd ラインヘッド
EP0607960B2 (fr) * 1993-01-20 2001-05-16 Ushiodenki Kabushiki Kaisha Lampe à décharge avec barrière diélectrique
JP2775695B2 (ja) * 1993-05-27 1998-07-16 ウシオ電機株式会社 誘電体バリヤ放電ランプ
TW348262B (en) * 1993-09-08 1998-12-21 Ushio Electric Inc Dielectric barrier discharge lamp
JP2775699B2 (ja) * 1994-09-20 1998-07-16 ウシオ電機株式会社 誘電体バリア放電ランプ
JP3319330B2 (ja) 1997-04-03 2002-08-26 ウシオ電機株式会社 放電ランプ
JP2000173554A (ja) * 1998-12-01 2000-06-23 Md Komu:Kk 誘電体バリア放電ランプ
JP3666407B2 (ja) 2001-04-19 2005-06-29 ウシオ電機株式会社 誘電体バリア放電ランプ
JP2006228563A (ja) * 2005-02-17 2006-08-31 Ushio Inc エキシマランプ
JP2006244898A (ja) * 2005-03-04 2006-09-14 Ushio Inc エキシマランプ
JP5303905B2 (ja) * 2007-11-06 2013-10-02 ウシオ電機株式会社 エキシマランプ

Also Published As

Publication number Publication date
US8174191B2 (en) 2012-05-08
KR20110041523A (ko) 2011-04-21
CN102084456B (zh) 2012-11-28
WO2010006642A1 (fr) 2010-01-21
JP2011528157A (ja) 2011-11-10
EP2297772A1 (fr) 2011-03-23
ATE545947T1 (de) 2012-03-15
TWI467630B (zh) 2015-01-01
KR101216481B1 (ko) 2013-01-09
CN102084456A (zh) 2011-06-01
TW201009890A (en) 2010-03-01
US20110101858A1 (en) 2011-05-05
JP5165108B2 (ja) 2013-03-21

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