EP0834905A2 - Lampe haute pression au sodium de faible puissance - Google Patents

Lampe haute pression au sodium de faible puissance Download PDF

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Publication number
EP0834905A2
EP0834905A2 EP97115536A EP97115536A EP0834905A2 EP 0834905 A2 EP0834905 A2 EP 0834905A2 EP 97115536 A EP97115536 A EP 97115536A EP 97115536 A EP97115536 A EP 97115536A EP 0834905 A2 EP0834905 A2 EP 0834905A2
Authority
EP
European Patent Office
Prior art keywords
pressure
xenon
sodium
lamp
nab
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.)
Granted
Application number
EP97115536A
Other languages
German (de)
English (en)
Other versions
EP0834905B1 (fr
EP0834905A3 (fr
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/fr
Publication of EP0834905A3 publication Critical patent/EP0834905A3/fr
Application granted granted Critical
Publication of EP0834905B1 publication Critical patent/EP0834905B1/fr
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.
  • lamps of this type have a circular cylindrical discharge vessel Made of aluminum oxide, which is housed in a translucent outer bulb is.
  • p NaB sodium operating pressure
  • p Xe (hot) ⁇ 800 mb
  • p NaB / p Xe (hot) ⁇ 1/20 Taking into account the usual factor 8 (see DE-AS 28 14 882, column 2, middle) for the conversion between xenon operating pressure and xenon cold filling pressure p XeK, this results in a pressure ratio p XeK / p NaB ⁇ 2.5.
  • 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 for this operating mode.
  • a relatively high xenon pressure and a relatively large inside diameter of the discharge vessel are used (see also the relevant monograph by D G / V V on pages 126 and 154).
  • D G / V V , P. 155 the self-stabilizing operation of high pressure sodium lamps has not found any practical application due to problems with the ignition and sudden changes in the mains voltage.
  • the high pressure sodium discharge lamp described by way of example in DE-PS 26 00 351 has a high output 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 around 3.5.
  • a rather moderate light output of only 110 lm / W is achieved with the high output of 400 W.
  • a particularly high luminous efficacy compared to other high-pressure sodium lamps is neither aimed for nor achieved.
  • Fig. 10.18 from D G / V V (P. 299) a luminous efficacy of up to 138 lm / W can be achieved at 400 W power. This principle dependency of the luminous efficacy on the lamp power is shown here again as Fig. 3 for comparison purposes (see below).
  • DE-AS 28 14 882 describes a mercury-free high-pressure sodium lamp without self-stabilization.
  • This value for the pressure ratio p XeK / p NaB agrees well with that described in DE-PS 26 00 351.
  • DE-AS 28 14 882 columnumn 3, line 41f
  • a further increase in the xenon pressure above this upper limit is discouraged, since the disadvantage of the more difficult ignition results, without this being offset by an increase in luminous efficacy ".
  • p NaB 230 mb
  • the xenon cold filling pressure is approximately 500 mb. This corresponds to a pressure ratio p XeK / p NaB of approximately 2 to 2.5 This results in a luminous efficacy of 97 or 105 lm / W at a power of 70 or 100 W.
  • the sodium high-pressure discharge lamp of low power has a discharge vessel which contains at least sodium and xenon. Under low power, lamp power in particular becomes smaller understood 100 W.
  • P NaB is the operating filling pressure of the sodium and p XeK is the cold filling pressure of the xenon.
  • the pressure ratio p XeK / p NaB is advantageously between 10 and 30.
  • mercury can fill the lamp be added.
  • the xenon pressure exceeds that of previously known high-pressure sodium discharge lamps with high xenon pressure (for example the NAV SUPER lamps from OSRAM) usual values by three to ten times.
  • high xenon pressure for example the NAV SUPER lamps from OSRAM
  • the surprising behavior of the lamps according to the invention is based on the targeted exploitation of a situation which has not previously been considered by experts. It is known that the luminous efficacy of high-pressure sodium lamps decreases significantly towards low lamp outputs (D. G / V V , P. 299; see below Fig. 3). However, the explanation given there that this law is responsible for the fact that the efficiency of the radiation is lower when the lamp power is low and the electrode losses are greater than when the lamp power is higher is incorrect. Rather, the main reason is that the relative proportion of the heat loss in the discharge arc to the lamp power increases with decreasing lamp power. This heat loss can, however, be reduced by the low thermal conductivity of xenon when it is used as a buffer gas at a sufficiently high pressure.
  • This effect has a more favorable effect on the luminous efficacy the smaller the lamp power.
  • the pressure ratio between xenon and sodium is of crucial importance, because unlike xenon, sodium has a high thermal conductivity. The higher the xenon pressure compared to the sodium pressure, the better the heat losses can be contained. Ultimately, this leads to the observed additional increase in luminous efficacy at low power levels.
  • the lamps described here are in contrast to DE-PS 26 00 351 for self-stabilizing operation is neither intended nor suitable. It is the xenon operating pressure of 8 to 24 bar achieved according to the invention is also significant higher than the typical value of 1.8 bar given there.
  • the heating of the discharge vessel described in DE-PS 26 00 351, which is there is necessary to start (alternatively a conventional ballast can be used are not required in the discharge vessel according to the invention.
  • the discharge vessel according to the invention preferably has one Appendix (initially open niobium tube), through the in a known manner Xenon can be filled with high pressure after the filling process is closed.
  • Luminous efficacy is similar in the case of lamps with and without added mercury.
  • a typical lamp fill with added mercury uses an amalgam with 18% by weight Na.
  • the inside diameter of the discharge vessel is preferably between 2.5 and 5 mm, in particular at most 4 mm. With these dimensions self-stabilization excluded from the outset. For comparison: the in DE-PS 26 00 351 inner diameters are by a whole power of ten greater.
  • the discharge vessel is circular-cylindrical, but it can also have a different geometry, for example in be bulged in the middle.
  • the high-pressure sodium discharge lamps advantageously also have a capacitive ignition aid, e.g. a wire along the discharge vessel.
  • a capacitive ignition aid e.g. a wire along the discharge vessel.
  • the lamps according to the invention require however no preheating.
  • the discharge vessels described here are preferably circular cylindrical or elliptical outer bulb used.
  • the high-pressure sodium discharge lamp shown in FIG. 1 with one power of 50 W has a discharge vessel 1 made of aluminum oxide. It is in one cylindrical outer bulb 2 made of tempered glass, which at its first End with a screw base 3 and at its second end with one Dome 9 is complete. The outer bulb 2 is evacuated.
  • the second electrode 4 is also via a niobium bushing 5 (however without appendix) connected to a metal wire 15. This is about one another conductor 16 connected to a second contact in the base 3.
  • the discharge vessel is equipped with a capacitive ignition aid that is formed by an ignition wire 17 along the discharge vessel.
  • a capacitive ignition aid that is formed by an ignition wire 17 along the discharge vessel.
  • Ignition wire 17 is electrically conductively connected to the second electrode 4.
  • the lamp is on, for example, via an ignition circuit in the lamp base an AC voltage network with 220 V is connected.
  • the ignition voltage is 4 kV.
  • the discharge vessel 2 contains a filling which only comprises sodium and xenon.
  • the cold filling pressure of the xenon (p XeK ) is 3 bar
  • This lamp achieves a luminous flux of 5100 lm and a luminous efficacy of 102 lm / W (see Figure 2, triangular full measuring point # 1 at 3000 mb Xenon cold filling pressure).
  • previous 50 W lamps have a xenon cold filling pressure of 300 mb (type SUPER) only one Luminous flux of 4200 lm achieved corresponding to a luminous efficacy of 81 lm / W (see Figure 2, triangular outlined measuring point).
  • 2 is also still the luminous efficacy for other lamps with the usual low xenon pressure of at most 100 mb (standard type). It is 30 mb about 70 lm / W (see Figure 2, triangular outlined measuring point).
  • Fig. 3 the dependence of the luminous efficacy on the lamp power is schematic based on D G / V V shown.
  • the value achieved with the above exemplary embodiment (102 lm / W at 50 W lamp power) is entered as a diamond-shaped measuring point. It is well above the state of the art.
  • an identical lamp is operated only with 1 bar xenon pressure and 50 mb sodium pressure.
  • p XeK / p NaB 20 .
  • the luminous efficacy of 95 lm / W (see Fig. 2, triangular full measuring point # 2 at 1000 mb cold xenon filling pressure) is still significantly higher than in the previously known lamps. Because of the lower xenon pressure, the ignition is facilitated compared to the first embodiment.
  • the ignition voltage is 3 kV.
  • the identical 50 W lamp is additionally filled with mercury.
  • An amalgam with 18% by weight sodium, the rest mercury, is used for this.
  • the corresponding light yields are those containing mercury Sodium lamps with lower xenon cold filling pressure (types SUPER and standard) also specified (circular outlined measuring points at 30 to 300 mb in Fig. 2).
  • a substantially similar lamp is operated with a power of 63 W.
  • 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 a direct replacement for High-pressure mercury lamps with 125 W power thought the same Have luminous flux. It has a power reduction circuit (Leading edge control) and an ignition circuit in the lamp base.
  • a discharge vessel with 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 therefore much higher than lamps of this power had previously been expected.
  • a discharge vessel with an inner diameter of 3.3 mm and an electrode spacing of 36 mm is filled with sodium / mercury amalgam (see above) and xenon.
  • 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 with lamps of this power.
  • a discharge vessel with 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 Lampe haute pression au sodium de faible puissance Expired - Lifetime EP0834905B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19640850 1996-10-02
DE19640850A DE19640850A1 (de) 1996-10-02 1996-10-02 Natriumhochdrucklampe kleiner Leistung
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 true EP0834905A2 (fr) 1998-04-08
EP0834905A3 EP0834905A3 (fr) 1998-06-03
EP0834905B1 EP0834905B1 (fr) 2008-11-12

Family

ID=26030069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115536A Expired - Lifetime EP0834905B1 (fr) 1996-10-02 1997-09-08 Lampe haute pression au sodium de faible puissance

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010004472A3 (fr) * 2008-07-10 2010-04-29 Koninklijke Philips Electronics N.V. Lampe à décharge à vapeur de sodium haute pression avec antenne hybride

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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
DE102009048831B4 (de) * 2009-10-09 2011-07-21 Osram Gesellschaft mit beschränkter Haftung, 81543 Verfahren zum Betreiben von Hochdruckentladungslampen
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
US9335038B2 (en) 2011-07-20 2016-05-10 Ip Holdings, Llc Vertically disposed HID lamp fixture
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USD843049S1 (en) 2017-09-14 2019-03-12 Hgci, Inc. Horticulture grow light
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298185A1 (fr) * 1975-01-17 1976-08-13 Philips Nv Procede permettant le fonctionnement d'une lampe a decharge sans ballast de stabilisation
FR2387511A1 (fr) * 1977-04-15 1978-11-10 Philips Nv Lampe a decharge dans la vapeur de sodium a haute pression
US4260929A (en) * 1977-04-15 1981-04-07 U.S. Philips Corporation High-pressure sodium vapor discharge lamp
EP0183247A2 (fr) * 1984-11-29 1986-06-04 General Electric Company Lampe à arc à haute pression à halogène de métal à xénon comme gaz tampon
EP0374678A2 (fr) * 1988-12-19 1990-06-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression de puissance électrique basse et méthode pour la faire fonctionner
US5239230A (en) * 1992-03-27 1993-08-24 General Electric Company High brightness discharge light source

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298185A1 (fr) * 1975-01-17 1976-08-13 Philips Nv Procede permettant le fonctionnement d'une lampe a decharge sans ballast de stabilisation
FR2387511A1 (fr) * 1977-04-15 1978-11-10 Philips Nv Lampe a decharge dans la vapeur de sodium a haute pression
US4260929A (en) * 1977-04-15 1981-04-07 U.S. Philips Corporation High-pressure sodium vapor discharge lamp
EP0183247A2 (fr) * 1984-11-29 1986-06-04 General Electric Company Lampe à arc à haute pression à halogène de métal à xénon comme gaz tampon
EP0374678A2 (fr) * 1988-12-19 1990-06-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression de puissance électrique basse et méthode pour la faire fonctionner
US5239230A (en) * 1992-03-27 1993-08-24 General Electric Company High brightness discharge light source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010004472A3 (fr) * 2008-07-10 2010-04-29 Koninklijke Philips Electronics N.V. Lampe à décharge à vapeur de sodium haute pression avec antenne hybride
US8456087B2 (en) 2008-07-10 2013-06-04 Koninklijke Philips Electronics N.V. High-pressure sodium vapor discharge lamp with hybrid antenna

Also Published As

Publication number Publication date
HUP9701600A2 (hu) 1998-06-29
JPH10112284A (ja) 1998-04-28
EP0834905B1 (fr) 2008-11-12
CA2217613A1 (fr) 1998-04-02
HU218401B (hu) 2000-08-28
DE19640850A1 (de) 1998-04-09
HU9701600D0 (en) 1997-11-28
HUP9701600A3 (en) 2000-02-28
US6051927A (en) 2000-04-18
CA2217613C (fr) 2004-09-14
EP0834905A3 (fr) 1998-06-03

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