EP0547374B1 - Lampe à décharge dans les gaz étanche - Google Patents

Lampe à décharge dans les gaz étanche Download PDF

Info

Publication number
EP0547374B1
EP0547374B1 EP92119328A EP92119328A EP0547374B1 EP 0547374 B1 EP0547374 B1 EP 0547374B1 EP 92119328 A EP92119328 A EP 92119328A EP 92119328 A EP92119328 A EP 92119328A EP 0547374 B1 EP0547374 B1 EP 0547374B1
Authority
EP
European Patent Office
Prior art keywords
gas discharge
discharge lamp
oxygen
lamp
water vapour
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.)
Expired - Lifetime
Application number
EP92119328A
Other languages
German (de)
English (en)
Other versions
EP0547374A1 (fr
Inventor
Andrzej Marek Rolski
Michael Zöchbauer
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun 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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Publication of EP0547374A1 publication Critical patent/EP0547374A1/fr
Application granted granted Critical
Publication of EP0547374B1 publication Critical patent/EP0547374B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • 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
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
    • H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising

Definitions

  • the invention relates to a gas-tight gas discharge lamp which is filled with a nitrogen-oxygen mixture at reduced pressure and in which a discharge current flows during operation.
  • Such gas discharge lamps are used in particular in photometers to determine the concentration of gases contained in a gas mixture, which absorb in the ultraviolet spectrum from 200 to 600 nm, such as. B. nitrogen oxide or sulfur dioxide.
  • Hollow cathode lamps are usually used as gas discharge lamps.
  • a photometer for determining the concentration of nitrogen oxide is known from DE-PS 25 41 162.
  • This photometer contains a gas discharge lamp in the form of a carbon cathode lamp filled with air at negative pressure, which is operated with a low discharge current, and a radiation detector for receiving the nitrogen oxide resonance radiation emitted by the hollow cathode lamp after passage through the gas mixture.
  • the hollow cathode lamp is sealed in a vacuum-tight manner, the pressure in the hollow cathode lamp is 1 to 5 mbar.
  • the life of the nitrogen oxide radiation is so short because of the oxygen from the nitrogen-oxygen mixture which is consumed during operation of the hollow cathode lamp that such a hollow cathode lamp, although without additional measures for laboratory applications, is not is suitable for industrial applications.
  • Increasing the pressure in the hollow cathode lamp increases the life of the nitrogen oxide radiation, but at the same time reduces the intensity of this radiation.
  • Another photometer with a gas discharge lamp in the form of a hollow cathode lamp is known from DE-PS 25 46 565.
  • This photometer is primarily designed for the determination of sulfur dioxide in a gas mixture. According to one embodiment of the photometer, it is also provided for the additional determination of nitrogen oxide in a gas mixture.
  • the hollow cathode lamp is filled with a dried nitrogen-oxygen mixture and is sealed in a vacuum-tight manner after it has been filled.
  • the lifespan of the nitrogen oxide radiation of the hollow cathode lamp required for determining the concentration of nitrogen oxide is so short because of the oxygen consumed from the nitrogen-oxygen mixture during operation of the hollow cathode lamp that such a hollow cathode lamp can be used for laboratory applications without additional measures , but is not suitable for industrial applications.
  • Such a hollow cathode lamp is known from DE-OS 29 25 410.
  • the cabbage cathode lamp is filled with a nitrogen-oxygen mixture at negative pressure and sealed gas-tight.
  • the influence of gas consumption is to be reduced by introducing a quantity of metal dioxide into the hollow cathode lamp.
  • the oxygen release of the metal dioxide at the temperatures prevailing during operation of the hollow cathode lamp is too low to replace the consumed oxygen.
  • the oxygen emitted by the metal dioxide due to the negative pressure prevailing in the carbon cathode lamp is also too low to replace the consumed oxygen.
  • the invention has for its object to improve a gas discharge lamp of the type mentioned so that the life of the used for the determination of the concentration of gases that absorb in the ultraviolet spectrum of 200 to 300 nm, extended.
  • the additional oxygen used to extend the life of the nitrogen oxide radiation is stored in the form of water vapor in the gas discharge lamp.
  • the additional oxygen is only obtained from the water vapor added to the nitrogen-oxygen mixture when the gas discharge lamp is operating within the discharge zone.
  • the invention is based on the finding that water vapor is stored in the gas discharge lamp instead of oxygen and that the oxygen required is only obtained from the water vapor when required.
  • the storage of water vapor has the advantage over the direct storage of oxygen that even with the low pressure in the gas discharge lamp, which is of the order of 10 mbar, so much water vapor can be stored that the photometer can be operated for one year to determine the concentration of nitrogen oxide without having to replace the gas discharge lamp.
  • the pressure in the gas discharge lamp which is increased to 5 to 20 mbar compared to the prior art (1 to 5 mbar), leads to a further increase in the life of the nitrogen oxide radiation with only a slightly reduced intensity of the emitted radiation.
  • the water vapor-storing medium is advantageously contained in a storage vessel connected to the gas discharge lamp. By heating the water vapor storage medium contained in the storage vessel, water vapor is supplied to the interior of the gas discharge lamp if necessary.
  • the use of manganese dioxide as a medium storing water vapor has proven to be particularly suitable, since it is chemically passive, stable under pressure and temperature and has a large storage capacity for water vapor.
  • the stored water vapor can be released in a defined manner by metered heating.
  • the gas discharge lamp is advantageously an electrodeless gas discharge lamp with high-frequency excitation or a hollow cathode lamp.
  • FIG. 1 shows a gas discharge lamp excited with high frequency, which is made of glass.
  • the lamp bulb 1 is from a coil 2 made of copper surround.
  • An alternating current flowing in the coil 2 serves to excite the plasma formation in the gas discharge lamp.
  • the frequency of the alternating current is in the order of 100 MHz.
  • the lamp bulb 1 is connected to a reservoir 4 via a connecting tube 3.
  • a small piston 5 is connected to the connecting pipe 3 and contains manganese dioxide 6 serving as a water vapor store.
  • the manganese dioxide filling can be fixed with floss 5 in the flask 5 using glass wool.
  • Arranged around the piston 5 is an electrical heating winding 7, only shown schematically, which serves to heat the manganese dioxide 6 if necessary.
  • the gas discharge lamp is filled with a nitrogen-oxygen mixture that is enriched with water vapor.
  • the nitrogen-oxygen mixture is enriched with water vapor in a known manner. This can e.g. B. when passing the nitrogen-oxygen mixture through a vessel filled with distilled water, in which the desired water vapor partial pressure is set via the temperature of the water.
  • the filling mixture produced in this way which consists of the nitrogen-oxygen mixture with water vapor components, is passed through the gas discharge lamp. If the manganese dioxide has not already been moistened beforehand, the manganese dioxide serving as a water vapor-storing medium is also moistened. After the vacuum of preferably 5 to 20 mbar required for the operation of the hollow cathode lamp has been set, the gas discharge lamp is closed in a gas-tight manner by melting.
  • water vapor is emitted by the manganese dioxide.
  • water vapor can also be released by heating the manganese dioxide.
  • the type and duration of the heating is selected so that essentially only the oxygen used is supplemented, so that the oxygen partial pressure in the gas discharge lamp remains approximately constant in the long term. This results in a significant extension of the life of the nitrogen oxide radiation emitted by the gas discharge lamp, which is used to determine the concentration of gases in the ultraviolet spectrum from 200 to 300 nm.
  • a photometer equipped with such a gas discharge lamp can be operated for one year to determine the concentration of nitrogen oxide without having to replace the gas discharge lamp.
  • FIG. 2 shows a gas discharge lamp designed as a hollow cathode lamp, which is made of glass.
  • a cathode 8 and an anode 9 are located in the lamp bulb 1.
  • the further construction of the hollow cathode lamp corresponds to that of the gas discharge lamp shown in FIG.
  • water vapor is emitted from the manganese dioxide when the pressure in the hollow cathode lamp drops, the consumed oxygen being obtained from the water vapor within the discharge zone.

Landscapes

  • Discharge Lamp (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Claims (6)

  1. Lampe luminescente à gaz (1) fermée de façon étanche au gaz, qui est remplie, en dépression, d'un mélange d'azote et d'oxygène et dans laquelle, en service, s'écoule un courant de décharge,
    caractérisée en ce que :
    - le mélange d'azote et d'oxygène dans la lampe luminescente à gaz (1) est enrichi en vapeur d'eau,
    - un milieu (6) stockant de la vapeur d'eau et humidifié par de la vapeur d'eau est prévu dans la lampe luminescente à gaz ou dans une réserve (5) reliée à la lampe luminescente à gaz (1), et
    - le milieu (6) stockant de la vapeur d'eau délivre de la vapeur d'eau lorsque la pression du gaz diminue.
  2. Lampe luminescente à gaz selon la revendication 1,
    caractérisée en ce que la pression dans la lampe luminescente à gaz vaut de 5 à 20 mbar.
  3. Lampe luminescente à gaz selon la revendication 1,
    caractérisée en ce que le milieu (6) stockant de la vapeur d'eau contenu dans la réserve (5) est réchauffé par un enroulement chauffant (7) entourant la réserve (5).
  4. Lampe luminescente à gaz selon une des revendications précédentes,
    caractérisée en ce que du dioxyde de manganèse sert de milieu (6) stockant de la vapeur d'eau.
  5. Lampe luminescente à gaz selon une des revendications précédentes,
    caractérisée en ce que la lampe luminescente à gaz est une lampe luminescente à gaz (1) sans électrode à excitation à haute fréquence (2).
  6. Lampe luminescente à gaz selon une des revendications 1 à 4,
    caractérisée en ce que la lampe luminescente à gaz est une lampe à cathode creuse (1,8,9).
EP92119328A 1991-11-22 1992-11-12 Lampe à décharge dans les gaz étanche Expired - Lifetime EP0547374B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4138425 1991-11-22
DE4138425A DE4138425C1 (fr) 1991-11-22 1991-11-22

Publications (2)

Publication Number Publication Date
EP0547374A1 EP0547374A1 (fr) 1993-06-23
EP0547374B1 true EP0547374B1 (fr) 1995-04-05

Family

ID=6445349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119328A Expired - Lifetime EP0547374B1 (fr) 1991-11-22 1992-11-12 Lampe à décharge dans les gaz étanche

Country Status (3)

Country Link
US (1) US5394058A (fr)
EP (1) EP0547374B1 (fr)
DE (2) DE4138425C1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2074454C1 (ru) * 1995-08-01 1997-02-27 Акционерное общество закрытого типа Научно-техническое агентство "Интеллект" Способ получения оптического излучения и разрядная лампа для его осуществления
DE19602924C2 (de) * 1996-01-22 1998-07-02 Hartmann & Braun Gmbh & Co Kg Elektrodenlose Entladungslampe zur Resonanzstrahlungsmessung
EP1798753A1 (fr) * 2005-12-13 2007-06-20 ABB PATENT GmbH Lampe à décharge sans électrode et son procédé de fonctionnement
CN101981652B (zh) * 2008-04-02 2012-08-22 富山县 紫外线发生装置以及使用该紫外线发生装置的照明装置
FR2980912A1 (fr) * 2012-02-23 2013-04-05 Centre Nat Rech Scient Lampe a decharge gazeuse sans mercure
KR102166480B1 (ko) * 2015-12-30 2020-10-15 베이징 이타운 세미컨덕터 테크놀로지 컴퍼니 리미티드 아크 램프용 질소 주입

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR579449A (fr) * 1924-03-04 1924-10-16 Perfectionnement apporté aux tubes à atmosphère raréfiée
US2103039A (en) * 1929-07-10 1937-12-21 Gen Electric Gaseous electric discharge device
DE1539097B2 (de) * 1965-07-26 1970-05-06 Western Electric Company Inc., New York, N.Y. (V.St.A.) Optischer Sender oder Verstärker mit einer Gasmischung (Gas-Laser)
DE2246365C3 (de) * 1972-09-21 1975-05-15 Deutsche Forschungs- U. Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5300 Bonn Verfahren und Vorrichtung zur Bestimmung der Stickoxidkonzentration in einem Gasgemisch
DE2541162C3 (de) * 1975-09-16 1981-05-21 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Vorrichtung zur Bestimmung der Stickoxydkonzentration in einem Gasgemisch
DE2546565C3 (de) * 1975-10-17 1978-06-15 Deutsche Forschungs- Und Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5300 Bonn Verfahren und Vorrichtung zur Bestimmung der Konzentration von Schwefeldioxid
DE2925410A1 (de) * 1979-06-23 1981-01-08 Hartmann & Braun Ag Niederdruck-hohlkathodenlampe mit einer stickstoff-sauerstoff-fuellung
DE3617110A1 (de) * 1986-05-21 1987-11-26 Leybold Heraeus Gmbh & Co Kg Lampe fuer die erzeugung von gas-resonanzstrahlungen

Also Published As

Publication number Publication date
EP0547374A1 (fr) 1993-06-23
DE4138425C1 (fr) 1993-02-25
US5394058A (en) 1995-02-28
DE59201841D1 (de) 1995-05-11

Similar Documents

Publication Publication Date Title
DE2626700C2 (de) Hochdruckgasentladungslampe und Verfahren zu ihrer Herstellung
EP0338637A2 (fr) Lampe à décharge à vapeur de mercure à haute pression
DE1589171B1 (de) Natriumdampflampe hoher intensitaet mit quecksilber
DE68911954T2 (de) Elektrische Lampe.
DE69402641T2 (de) Cadmiumentladungslampe
EP0547374B1 (fr) Lampe à décharge dans les gaz étanche
DE2835575C2 (de) Leuchtstoff für eine Niederdruckquecksilberdampfentladungslampe
DE3038993C2 (de) Metalldampfentladungslampe
DE873290C (de) Elektrische Gluehlampe mit Leuchtkoerper aus hochschmelzenden Metallen oder Metallverbindungen
DE4018792C2 (de) Verfahren zur Herstellung einer Gasentladungslichtquelle sowie Gasentladungsröhre
DE19534686A1 (de) Integrierte Zünd- und Betriebs-Amalgambaueinheit für eine elektrodenlose Fluoreszenzlampe
DE2920042A1 (de) Kurzbogenentladungslampe
DD259281A5 (de) Eine kompakte niederdruck-quecksilberdampfentladungslampe
EP0040812A1 (fr) Lampe à décharge à basse pression
EP0239005A2 (fr) Lampe à incandescence à halogène
DE3141854A1 (de) Niederdruckquecksilberdampfentladungslampe
EP3699951B1 (fr) Émetteur de rayonnement basse pression à mercure, procédé de fonctionnement ainsi qu&#39;utilisation d&#39;halogénure de mercure dans l&#39;espace de décharge d&#39;un tel émetteur
DE1938955B2 (de) Elektrische Gluehlampe
DE661519C (de) Elektrische Tellurdampf-Entladungslampe
DE1589178C (fr)
AT232130B (de) Elektrische Gasentladungslampe
AT117992B (de) Verfahren zum Betriebe einer elektrischen Entladungsröhre.
DE2303282B2 (de) Niederdruck-Gasentladungslampe
AT151817B (de) Elektrische Entladungsröhre.
AT156331B (de) Quecksilberniederdruckröhre mit einer aus einem Neon-Argon-Gemisch bestehenden Grundgasfüllung.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19930525

17Q First examination report despatched

Effective date: 19931119

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59201841

Country of ref document: DE

Date of ref document: 19950511

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950627

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960731

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19961112

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961118

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19970601

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19961112

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19970601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051112