EP0834905B1 - Natriumhochdrucklampe kleiner Leistung - Google Patents

Natriumhochdrucklampe kleiner Leistung Download PDF

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Publication number
EP0834905B1
EP0834905B1 EP97115536A EP97115536A EP0834905B1 EP 0834905 B1 EP0834905 B1 EP 0834905B1 EP 97115536 A EP97115536 A EP 97115536A EP 97115536 A EP97115536 A EP 97115536A EP 0834905 B1 EP0834905 B1 EP 0834905B1
Authority
EP
European Patent Office
Prior art keywords
pressure
xenon
sodium
nab
lamp
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
EP97115536A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0834905A3 (de
EP0834905A2 (de
Inventor
Wolfram Dr. Graser
Dieter Dr. Schmidt
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0834905A2 publication Critical patent/EP0834905A2/de
Publication of EP0834905A3 publication Critical patent/EP0834905A3/de
Application granted granted Critical
Publication of EP0834905B1 publication Critical patent/EP0834905B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
    • H01J61/22—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent vapour of an alkali metal
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/825—High-pressure sodium lamps
    • 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 high-pressure sodium discharge lamp according to the preamble of claim 1.
  • high-pressure sodium discharge lamps with a power of at most 100 W and very high xenon pressure.
  • lamps have a circular cylindrical discharge vessel of alumina, which is housed in a translucent outer bulb.
  • the aim is to operate a high-pressure sodium lamp without a ballast.
  • a long disintegration time of the plasma formed from the filling gas is necessary.
  • a relatively high xenon pressure and a relatively large inside diameter of the discharge vessel are used, as known per se (see also the abovementioned relevant monograph by DE GROOT / VAN VLIET on page 126 and 154).
  • DE GROOT / VAN VLIET p. 155, the self-stabilizing operation of high-pressure sodium lamps has not found any practical application due to problems with ignition and sudden changes in the mains voltage.
  • Sodium high-pressure discharge lamp described by way of example has a high power of 400 W and a very large inner diameter of 7.6 mm.
  • the xenon cold filling pressure is 260 mb and the pressure ratio p XeK / p NaB is about 3.5. This achieves a rather moderate light output of only 110 lm / W at the high power of 400 W.
  • a particularly bohe luminous efficacy in comparison to other high-pressure sodium lamps is neither sought nor achieved.
  • FIG. 10.18 of DE GROOT / VAN VLIET page 299), at 400 W power, rather, light outputs of up to 138 lm / W can be achieved.
  • a sodium high-pressure lamp which contains sodium and xenon, wherein the Na operating pressure of 50 to 200 Torr is disclosed, corresponding to 67 to 267 mbar.
  • the disclosed Xe cold fill pressure is 50 to 1000 Torr, corresponding to 67 to 1333 mbar.
  • a metal halide lamp that uses sodium iodide together with xenon as a buffer gas with no mercury is out EP-A 183 247 previously known, wherein the Na partial pressure between 10 and 100 Torr and 13 to 133 mbar and the Xenonkaltglalldruck between 60 and 1000 Torr and 80 to 1333 mbar.
  • a conventional metal halide lamp with sodium iodide shows EP-A 374 678 ,
  • the low-pressure sodium high-pressure discharge lamp according to the invention has a discharge vessel which contains at least sodium and xenon.
  • Low power is understood to mean a lamp power of less than or equal to 100W.
  • p NaB is the operating pressure of sodium and p XeK is the cold pressure of the xenon.
  • p NaB 20 to 100 mb
  • p XeK 1 to 5 bar is selected and if, at the same time, the condition p XeK / p NaB ⁇ 10 is maintained.
  • the pressure ratio p XeK / p NaB is between 10 and 30.
  • mercury may be added to the lamp filling.
  • the xenon pressure exceeds the usual with conventional high pressure sodium discharge lamps with high xenon pressure (for example, the NAV SUPER lamps from. OSRAM) by three to ten times. Compared to these NAV-SUPER lamps, this results in a typically 20% increase in luminous efficacy.
  • the surprising behavior of the lamps according to the invention is based on the targeted utilization of a previously not considered by experts in the facts.
  • the luminous efficacy of high-pressure sodium lamps to small lamp powers decreases significantly (DE GROOT / VAN VLIET, p 299, see below Fig. 3 ).
  • the statement given there that is responsible for this law the fact that at low lamp power, the efficiency of the radiation is lower and the electrode losses are greater than with larger lamp power, but is not correct. Rather, the main reason is that the relative contribution of heat loss in the arc to the lamp power increases with decreasing lamp power. However, this heat loss can be reduced by the low thermal conductivity of xenon when used at sufficiently high pressure as a buffer gas.
  • the lamps described here are in contrast to DE-PS 26 00 351 neither intended nor suitable for self-stabilizing operation.
  • the xenon operating pressure achieved according to the invention at 8 to 24 bar is also substantially higher than the typical value of 1.8 bar given there.
  • the discharge vessel according to the invention preferably has an appendix (initially open niobium tube) through which xenon can be filled at high pressure in a manner known per se and which is closed after the filling process.
  • the lamps according to the invention may additionally contain mercury in the filling.
  • the increase in the light output is similar for lamps with and without mercury addition.
  • a typical mercury-added lamp fill uses an amalgam of 18% by weight Na.
  • the inner diameter of the discharge vessel is between 2.5 and 5 mm, in particular at most 4 mm. With these dimensions self-stabilization is excluded from the outset.
  • the in DE-PS 26 00 351 given inside diameter are larger by a whole power of ten.
  • the discharge vessel is circular cylindrical, but it may also have a different geometry, for example, be bulged in the middle.
  • the sodium high-pressure discharge lamps additionally have a capacitive starting aid, for example a wire along the discharge vessel.
  • a capacitive starting aid for example a wire along the discharge vessel.
  • the lamps of the invention require no preheating.
  • the discharge vessels described here are preferably used in circular-cylindrical or elliptical outer pistons.
  • sodium high-pressure discharge lamp with a power of 50 W has a discharge vessel 1 made of alumina. It is arranged in a cylindrical outer bulb 2 made of hard glass, which is closed at its first end with a screw base 3 and at its second end with a dome 9. The outer bulb 2 is evacuated.
  • the socket-remote first electrode 4 is connected via a tubular niobium feedthrough 5 with appendix 6 to a feed line 7, which is connected to a solid external power supply 8, which leads along the discharge vessel to contact in the screw base 3.
  • the second electrode 4 is also connected to a metal wire 15 via a niobium feedthrough 5 (but without the appendix). This is connected via a further conductor 16 to a second contact in the base 3.
  • the discharge vessel is equipped with a capacitive starting aid, which is formed by an ignition wire 17 along the discharge vessel.
  • the ignition wire 17 is electrically conductively connected to the second electrode 4.
  • the lamp is connected, for example via an ignition circuit in the lamp socket to an AC power supply with 220 V.
  • the ignition voltage is 4 kV.
  • the discharge vessel 2 contains a filling comprising only sodium and xenon.
  • the cold pressure of the xenon (p XeK ) is 3 bar
  • the operating pressure of the sodium (p NaB ) is 100 mb
  • P XeK / p NaB 30.
  • This lamp achieves a luminous flux of 5100 lm and a luminous efficacy of 102 lm / W (see FIG. 2 , triangular full measuring point # 1 at 3000 mb xenon cold filling pressure).
  • previous 50 W lamps with a xenon cold filling pressure of 300 mb only achieved a luminous flux of 4200 lm, corresponding to a luminous efficacy of 81 lm / W (see FIG. 2 triangular outlined measuring point).
  • Fig. 2 is also the light output for other lamps with the usual low xenon pressure of 100 mb (standard) specified. It is about 70 lm / W at 30 mb (see FIG. 2 triangular outlined measuring point).
  • Fig. 3 the dependence of the light yield on the lamp power is shown schematically in accordance with DE GROOT / VAN VLIET.
  • the value achieved with the above embodiment (102 lm / W at 50 W lamp power) is entered as a diamond-shaped measuring point. He is well above the state of the art.
  • a lamp of the same type is operated only with 1 bar xenon pressure and 50 mb sodium pressure.
  • p XeK / p NaB 20.
  • the luminous efficacy is 95 lm / W (see Fig. 2 , triangular full measuring point # 2 at 1000 mb Xenonkalt Scholldruck) still significantly higher than in the prior art lamps.
  • ignition is easier than the first embodiment.
  • the ignition voltage is 3 kV.
  • the identical 50 W lamp is additionally filled with mercury.
  • an amalgam with 18 wt .-% sodium, balance mercury is used.
  • a FOURTH embodiment (50 W) with 1 bar xenon cold filling pressure at the same Na / Hg ratio shows a luminous efficacy of 93 lm / W (circular full measuring point # 4 in FIG Fig. 2 ).
  • a substantially similar lamp is operated at 63 W power.
  • the filling contains 1 bar xenon and 50 mb sodium, but no mercury.
  • the pressure ratio p XeK / p NaB 20.
  • the luminous efficacy is 98 lm / W.
  • This lamp is intended as a direct replacement for high-pressure 125W mercury lamps that have the same luminous flux. It has a power reduction circuit (phase control) and an ignition circuit in the lamp base.
  • a discharge vessel having an inner diameter of 3.3 mm and an electrode spacing of 23 mm is filled only with sodium and xenon.
  • the pressure ratio p XeK / p NaB 22.2.
  • the luminous efficacy is 98 lm / W (see Fig. 3 , diamond-shaped measuring point # 6) and is thus much higher than lamps of this power was previously expected.
  • a discharge vessel having an inside diameter of 3.3 mm and an electrode spacing of 36 mm with sodium / mercury amalgam (see above) and xenon filled.
  • the pressure ratio p XeK / p NaB 26.7.
  • the luminous efficacy is 115 lm / W (see Fig. 3 , diamond-shaped measuring point # 7) and is therefore also significantly higher than was previously expected for lamps of this power.
  • a discharge vessel having an inner diameter of 3.7 mm and an electrode spacing of 37 mm is filled with sodium / mercury and xenon.
  • the pressure ratio p XeK / p NaB 17.6.
  • the luminous efficacy is 108 lm / W

Landscapes

  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP97115536A 1996-10-02 1997-09-08 Natriumhochdrucklampe kleiner Leistung Expired - Lifetime EP0834905B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19640850A DE19640850A1 (de) 1996-10-02 1996-10-02 Natriumhochdrucklampe kleiner Leistung
DE19640850 1996-10-02
US08/941,941 US6051927A (en) 1996-10-02 1997-10-01 High pressure sodium lamp of low power

Publications (3)

Publication Number Publication Date
EP0834905A2 EP0834905A2 (de) 1998-04-08
EP0834905A3 EP0834905A3 (de) 1998-06-03
EP0834905B1 true EP0834905B1 (de) 2008-11-12

Family

ID=26030069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115536A Expired - Lifetime EP0834905B1 (de) 1996-10-02 1997-09-08 Natriumhochdrucklampe kleiner Leistung

Country Status (6)

Country Link
US (1) US6051927A (hu)
EP (1) EP0834905B1 (hu)
JP (1) JPH10112284A (hu)
CA (1) CA2217613C (hu)
DE (1) DE19640850A1 (hu)
HU (1) HU218401B (hu)

Cited By (2)

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US8659225B2 (en) 2011-10-18 2014-02-25 General Electric Company High intensity discharge lamp with crown and foil ignition aid
US8766518B2 (en) 2011-07-08 2014-07-01 General Electric Company High intensity discharge lamp with ignition aid

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DE19851955B4 (de) * 1998-11-02 2004-12-09 Flowil International Lighting (Holding) B.V. Hochdrucknatriumdampflampe
DE202008007162U1 (de) 2008-05-28 2008-08-07 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
JP5578526B2 (ja) 2008-07-10 2014-08-27 コーニンクレッカ フィリップス エヌ ヴェ ハイブリッドアンテナを備えた高圧ナトリウム放電ランプ
DE102009048831B4 (de) * 2009-10-09 2011-07-21 Osram Gesellschaft mit beschränkter Haftung, 81543 Verfahren zum Betreiben von Hochdruckentladungslampen
US9335038B2 (en) 2011-07-20 2016-05-10 Ip Holdings, Llc Vertically disposed HID lamp fixture
USD770079S1 (en) 2015-04-02 2016-10-25 Ip Holdings, Llc Light fixture
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USD698987S1 (en) 2013-06-20 2014-02-04 Ip Holdings, Llc Horticulture grow light housing
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US9016907B2 (en) 2013-07-18 2015-04-28 Ip Holdings, Llc Air cooled horticulture lighting fixture for a double ended high pressure sodium lamp
USD748849S1 (en) 2014-06-11 2016-02-02 Ip Holdings, Llc Sealed optics air cooled grow light
US9750199B2 (en) 2013-07-18 2017-09-05 Ip Holdings, Llc Air cooled horticulture lighting fixture
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US10074532B1 (en) * 2017-03-07 2018-09-11 Eye Lighting International Of North America, Inc. Semi-active antenna starting aid for HID arc tubes
USD822882S1 (en) 2017-05-17 2018-07-10 Ip Holdings, Llc Horticulture grow light
USD843049S1 (en) 2017-09-14 2019-03-12 Hgci, Inc. Horticulture grow light
USD842532S1 (en) 2017-10-25 2019-03-05 Hgci, Inc. Light fixture
USD871654S1 (en) 2017-10-30 2019-12-31 Hgci, Inc. Light fixture
USD848663S1 (en) 2017-11-03 2019-05-14 Hgci, Inc. Light fixture
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USD848665S1 (en) 2017-11-08 2019-05-14 Hgci, Inc. Horticulture grow light

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4260929A (en) * 1977-04-15 1981-04-07 U.S. Philips Corporation High-pressure sodium vapor discharge lamp

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NL168993C (nl) * 1975-01-17 1982-05-17 Philips Nv Werkwijze voor het bedrijven van een zelfstabiliserende ontladingslamp.
NL181157C (nl) * 1977-04-15 1987-06-16 Philips Nv Hogedruknatriumdampontladingslamp.
BR8506070A (pt) * 1984-11-29 1986-08-19 Gen Electric Enchimento de tubo de arco para lampada de arco de halogeneto de metal de alta pressao e lampada de descarga de arco de alta intensidade
DE3842771A1 (de) * 1988-12-19 1990-06-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe kleiner elektrischer leistung und verfahren zum betrieb
US5239230A (en) * 1992-03-27 1993-08-24 General Electric Company High brightness discharge light source

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260929A (en) * 1977-04-15 1981-04-07 U.S. Philips Corporation High-pressure sodium vapor discharge lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8766518B2 (en) 2011-07-08 2014-07-01 General Electric Company High intensity discharge lamp with ignition aid
US8659225B2 (en) 2011-10-18 2014-02-25 General Electric Company High intensity discharge lamp with crown and foil ignition aid

Also Published As

Publication number Publication date
CA2217613C (en) 2004-09-14
HUP9701600A3 (en) 2000-02-28
HU9701600D0 (en) 1997-11-28
HU218401B (hu) 2000-08-28
HUP9701600A2 (hu) 1998-06-29
EP0834905A3 (de) 1998-06-03
DE19640850A1 (de) 1998-04-09
EP0834905A2 (de) 1998-04-08
US6051927A (en) 2000-04-18
CA2217613A1 (en) 1998-04-02
JPH10112284A (ja) 1998-04-28

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