EP2050123A2 - Lampe a decharge, en particulier lampe a decharge basse pression - Google Patents

Lampe a decharge, en particulier lampe a decharge basse pression

Info

Publication number
EP2050123A2
EP2050123A2 EP07788290A EP07788290A EP2050123A2 EP 2050123 A2 EP2050123 A2 EP 2050123A2 EP 07788290 A EP07788290 A EP 07788290A EP 07788290 A EP07788290 A EP 07788290A EP 2050123 A2 EP2050123 A2 EP 2050123A2
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
discharge
pipe section
lamp according
cooling device
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.)
Withdrawn
Application number
EP07788290A
Other languages
German (de)
English (en)
Inventor
Holger Hein
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
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2050123A2 publication Critical patent/EP2050123A2/fr
Withdrawn legal-status Critical Current

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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts 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
    • H01J61/24—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
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path
    • 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

Definitions

  • Discharge lamp in particular low-pressure discharge lamp
  • the invention relates to a discharge lamp, in particular a low-pressure discharge lamp, comprising a discharge vessel and a pipe section which attaches to the discharge vessel and in which a mercury source is arranged.
  • Hg source liquid source of mercury
  • Hg source basically includes two functions, namely, that of an Hg donor. This is a material or a body in which the mercury is contained.
  • steam pressure regulating Hg compounds such as amalgams.
  • a vapor pressure-regulating element and in particular an amalgam is required. The temperature of the vapor pressure regulating element controls the vapor pressure of the mercury in the discharge.
  • a discharge lamp in which the discharge vessel has a helical shape and is connected to a housing in which an integrated electronic ballast is arranged is known from DE 10 2004 018 104 A1.
  • Energy-saving lamps are known types with such a Hg source, which are designed for relatively high temperatures at the location of the Hg source, which may be the case at high ambient temperatures.
  • the amalgam By regulating the mercury vapor pressure, the amalgam also regulates the photoelectric values, such as the power, luminous flux and efficiency of the discharge lamp.
  • the problem may arise that the temperature of the working amalgam is too high and thus deteriorate the photoelectric values. It is known that in order to alleviate this problem if the amalgam temperature is too high, either the amalgam alloy is adjusted or another location of introduction is selected. However, this is usually very complex and allows only conditional improvement.
  • a discharge lamp according to the invention in particular a low-pressure discharge lamp, comprises a discharge vessel and a pipe section which attaches to the discharge vessel and in which a mercury source, in particular in the form of a mercury amalgam, is arranged.
  • a cooling device for heat dissipation at least of the heating during operation of the discharge lamp tube piece.
  • This integrated arrangement of a cooling device on the pipe section can also allow a significantly improved temperature control of the Hg source even in discharge lamps, which are operated even at relatively hot ambient temperatures.
  • the heat dissipation of the pipe section is controlled, and the Hg source located in the pipe section can be controlled temperature. In particular, optimal cooling can be achieved at relatively high temperatures of the amalgam or the Hg source.
  • the cooling device integrated in the discharge lamp can be arranged so that the dimensions of the discharge lamp remain unchanged or substantially unchanged. The compactness of the discharge lamp is thus not affected by this additional cooling device.
  • the cooling device is arranged on a discharge vessel facing away from the first end of the pipe section.
  • the cooling device preferably comprises a heat sink, which in particular is meander-shaped. It can be provided that the heat sink is designed as a wound metal strip. This meander-shaped structure of the heat sink allows a compact and space-saving design and yet a surface provided relatively large for heat dissipation. By the length of the meandering heat sink or by another geometry, the cooling capacity can be defined and thus the position of the maximum light flux can be controlled.
  • the meander-shaped heat sink is preferably arranged essentially between two opposite end regions of the discharge vessel. - A -
  • the discharge vessel may preferably have a helical design, and the two end regions of this helical shape are preferably oriented in one direction.
  • discharge vessel such as 3-tube lamps possible, for example, have three U-shaped curved tubes which are connected via approaches to a contiguous discharge vessel, which lamps have a Hg source in the discharge vessel attached to the pump tube.
  • This meandering heat sink can also be arranged at least partially within this helical shape.
  • the cooling device is arranged at least partially in a housing into which the end regions of the discharge vessel and the first end of the pipe section extend.
  • the heat sink of this cooling device may be at least partially in this housing.
  • an integrated ballast of the discharge lamp is arranged in the housing.
  • the meander-shaped configuration of the heat sink may preferably be arranged centrally between the end regions of the discharge vessel. Such centering allows the widest possible distance to adjacent components of the discharge lamp.
  • the end region of the discharge vessel facing the housing can be covered by a cover cap.
  • the discharge lamp has an enveloping piston which surrounds the discharge vessel.
  • the cooling device can be arranged at least partially between the enveloping piston and the discharge vessel.
  • the discharge lamp according to the invention is designed so that ambient temperatures in the range of Hg source can occur up to about 150 ° C. Since even for high-temperature amalgams a maximum operating temperature range up to about 135 ° C, can be achieved by this cooling device at such relatively hot ambient temperatures, a corresponding cooling and significantly improved control of mercury vapor pressure can be achieved by the amalgam even at such high ambient temperatures.
  • the cooling device comprises a ring-like insulation element for electrical insulation, which is arranged on the pipe section with the amalgam and on which the heat sink is arranged or fastened.
  • the insulation element is arranged adjacent to an end region of the discharge vessel. The stable positioning and arrangement can be ensured.
  • the opening provided in the insulating element for the passage of the pipe section is designed so that a relative movement between the pipe section and the insulation element in a direction perpendicular to the opening axis is feasible. It can be provided that this opening is oval. An embodiment of the opening as a slot is also possible.
  • the insulation element is positioned in the housing of the discharge lamp. It may be provided that the insulation element is integrated in the cover cap, which is preferably releasably attached to the end portion of the discharge vessel facing the housing.
  • the insulation element can be used in this context multifunctional and also serves to stably support these power supplies. Due to the configuration as an electrically insulating element and the current control can be kept defined by the particular metallic heat sink away.
  • the insulating element may be formed of plastic. It can be provided that a highly thermally conductive, highly electrically insulating material is used.
  • the insulating element may be formed at least partially from oxide ceramics, in particular aluminum oxide.
  • an end web of the heat sink is guided in a guide rail of the insulating element spaced from the power supply lines.
  • the cooling device, in particular the heat sink can be contacted at least in regions by a heat-conducting adhesive or a thermal compound. The heat transfer can be further improved.
  • the proposed discharge lamp By the proposed discharge lamp, a relatively good start-up behavior of amalgams with a low operating temperature range, such as a Biln 32 Hg 4 -Amalgam be maintained.
  • a temperature range between about 66 ° C and about 82 ° C can be achieved that the luminous flux is above 90%.
  • the light flux maximum can be shifted to or in the direction of a temperature of low temperatures.
  • Fig. 1 is a schematic representation of a discharge lamp according to the invention
  • FIG. 2 is a perspective view of a portion of a discharge lamp according to the invention.
  • FIG. 3 shows a first view of a partial region of the discharge lamp according to the invention.
  • FIG. 4 shows a second partial region of a discharge lamp according to the invention in a perspective illustration.
  • FIG. 1 shows a discharge lamp I designed as a compact fluorescent lamp, which has an enveloping bulb 1.
  • the enveloping piston 1 encloses a helically wound discharge vessel 2.
  • the tubular and helically wound discharge vessel 2 is connected to an electronic ballast shown only with its housing 3. At this case 3 and the enveloping piston 1 is fixed by locking elements.
  • the housing 3 of the ballast ends in a standardized lamp base 4.
  • the discharge vessel 2 is composed of two coiled discharge tube parts, which merge into one another in a region 5.
  • the two ends 21 and 22 of the discharge vessel 2 are arranged substantially opposite one another and in the same orientation in the direction of the housing 3. As can be seen from the illustration in Fig. 1, these ends 21 and 22 extend into the housing 3. At one end 21 is a as
  • Hg source 7 is a BiIn 32 Hg 4 -
  • Fig. 1 illustrates that the Pumprohr approach or the pipe section 6 has a significantly smaller diameter than the discharge vessel 2 in this end 21.
  • this pipe section 6 is a first Electrode or a lamp filament arranged in the first end 21.
  • the pipe section 6 projects on the one hand into the end 21 and on the other hand projects from it into the housing 3.
  • the illustration shown clearly shows that the temperature of the Hg source 7 accommodated in the pipe section 6 depends strongly on the ambient temperature in the housing 3, which in turn depends on the external ambient temperature, the heat input as a result of the power loss of the operating device and lamp body, the operating time and also the installation position of the discharge lamp I depends.
  • the discharge lamp I further comprises a cooling device 8, which is shown schematically in FIG.
  • the cooling device 8 is arranged completely in the embodiment 3 in the embodiment. As can be seen, the cooling device 8 surrounds the pipe piece 6 and extends in the direction of the second end 22. In the exemplary embodiment, the cooling device 8 is positioned substantially centered in the housing 3.
  • FIG. 2 is a perspective view of the discharge vessel 2 and the cooling device 8 is shown.
  • the housing 3 is removed and the cooling device 8 can be seen.
  • This comprises a heat sink 81, which is designed as a meander-shaped metal strip.
  • One end 81 a of this heat sink 81 is connected to an insulation element 82.
  • this end 81 a is inserted in a guide rail 82 a of this insulating member 82 and secured therein.
  • the ring-like insulating member 82 surrounds the pipe piece 6 and this pipe piece 6 protrudes through an opening 82b.
  • This opening 82b has an oval shape in the embodiment and is designed similar to a slot.
  • this opening 82b are chosen so that the outer diameter of the pipe section 6 is smaller and thereby tolerances of the burner of the discharge lamp I can be compensated.
  • the insulation element 82 designed for electrical insulation lies directly on a surface 21 a (FIG. 1) of the first end 21. A positionally stable arrangement can be made possible thereby.
  • power supply lines 9a and 9b are shown for a lamp filament extending into the discharge vessel 2 at the first end 21. Both power supply lines 9a and 9b are guided through the opening 82b to the lamp filament.
  • a current guidance defined by the metallic heat sink 81 can be kept away.
  • the heat transfer by means of a thermal adhesive or a thermal paste, which is at least partially applied to the heat sink 81, and between the pipe section 6 and the end 81 a is introduced, is improved.
  • Fig. 3 is a perspective view of the insulating member 2 is shown in a plan view. It can be seen that the guide rail 82a is formed by a longitudinal web 82c and end regions of an arcuate web 82d. The guide rail is disposed adjacent to the edge portion of the opening 82b.
  • FIG. 4 is a perspective view of the insulating member 82 shown from below.
  • An underside 82e lies at least in regions on the outer surface 21a (FIG. 1).

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

La présente invention concerne une lampe à décharge, en particulier une lampe à décharge basse pression, comprenant un récipient de décharge (2) et un tuyau (6) à placer au niveau du récipient de décharge (2), dans lequel tuyau est disposée une source de Hg (7). Un dispositif de refroidissement (8) est formé au niveau du tuyau (6) pour évacuer la chaleur au moins du tuyau (6) se réchauffant pendant le fonctionnement de la lampe à décharge (I).
EP07788290A 2006-08-10 2007-08-07 Lampe a decharge, en particulier lampe a decharge basse pression Withdrawn EP2050123A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006037550A DE102006037550A1 (de) 2006-08-10 2006-08-10 Entladungslampe, insbesondere Niederdruckentladungslampe
PCT/EP2007/058191 WO2008017675A2 (fr) 2006-08-10 2007-08-07 Lampe à décharge, en particulier lampe à décharge basse pression

Publications (1)

Publication Number Publication Date
EP2050123A2 true EP2050123A2 (fr) 2009-04-22

Family

ID=38476928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788290A Withdrawn EP2050123A2 (fr) 2006-08-10 2007-08-07 Lampe a decharge, en particulier lampe a decharge basse pression

Country Status (5)

Country Link
US (1) US20090243459A1 (fr)
EP (1) EP2050123A2 (fr)
CN (1) CN101501815A (fr)
DE (1) DE102006037550A1 (fr)
WO (1) WO2008017675A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007582A1 (de) 2011-04-18 2012-10-18 Osram Ag Hochdruckentladungslampe mit integriertem Vorschaltgerät

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432675A1 (de) * 1984-09-05 1986-03-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Kompakte niederdruckentladungslampe
GB9213846D0 (en) * 1992-06-30 1992-08-12 G E Thorn Lamps Limited Fluorescent lamp
US5717277A (en) * 1993-04-30 1998-02-10 The Regents, University Of California Compact fluorescent lamp using horizontal and vertical insulating septums and convective venting geometry
JP3275797B2 (ja) * 1997-09-10 2002-04-22 松下電器産業株式会社 低圧水銀蒸気放電ランプ
JP2001283607A (ja) * 2000-03-31 2001-10-12 Toshiba Lighting & Technology Corp 電球形蛍光ランプ
US6445131B1 (en) * 2000-05-17 2002-09-03 General Electric Company Compact fluorescent lamp with built-in operating circuit
US6597106B2 (en) * 2000-12-28 2003-07-22 General Electric Company Compact fluorescent lamp with a housing structure
DE10201617C5 (de) * 2002-01-16 2010-07-08 Wedeco Ag Water Technology Amalgamdotierter Quecksilberniederdruck-UV-Strahler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008017675A3 *

Also Published As

Publication number Publication date
DE102006037550A1 (de) 2008-02-14
WO2008017675A2 (fr) 2008-02-14
US20090243459A1 (en) 2009-10-01
CN101501815A (zh) 2009-08-05
WO2008017675A3 (fr) 2008-09-25

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