EP2054923A2 - Lampe à décharge basse pression comprenant un réflecteur - Google Patents

Lampe à décharge basse pression comprenant un réflecteur

Info

Publication number
EP2054923A2
EP2054923A2 EP07821428A EP07821428A EP2054923A2 EP 2054923 A2 EP2054923 A2 EP 2054923A2 EP 07821428 A EP07821428 A EP 07821428A EP 07821428 A EP07821428 A EP 07821428A EP 2054923 A2 EP2054923 A2 EP 2054923A2
Authority
EP
European Patent Office
Prior art keywords
low
vessel
discharge lamp
pressure discharge
lamp according
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Withdrawn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
EP07821428A
Other languages
German (de)
English (en)
Inventor
Holger Hein
Paul Lange
Thomas Noll
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 EP2054923A2 publication Critical patent/EP2054923A2/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Withdrawn legal-status Critical Current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
    • H01J61/30—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
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to a low-pressure discharge lamp according to claim 1, in particular a low-pressure mercury vapor discharge lamp.
  • the low-pressure discharge lamp according to the invention has a discharge vessel, which is sealed at two ends and is at least partially surrounded by a reflector, and a heat dissipating means, which is outside the sealed ends of the discharge vessel with the Entla ⁇ training vessel in contact.
  • the discharge vessel are and the DAR enclosed in the discharge medium cooled to the Tem ⁇ temperature of the discharge medium and in particular its vapor pressure to maintain during lamp operation in a range that ensures the greatest possible luminous flux without For this the use of an amalgam would be necessary.
  • the heat dissipating means communicates with the reflector or a lamp housing in connection to dissipate the heat through the reflector or the lamp housing to the outside.
  • the heat dissipating means is preferably arranged at the light exit opening of the reflector to a convective cooling with the aid of ambient air allowed ⁇ union.
  • the discharge vessel of the low-pressure discharge lamp according to the invention has a shape for generating a so-called cold spot, that is, a coolest point of the discharge vessel, which determines the vapor pressure of the discharge medium, for example mercury, and at which the excess mercury condenses.
  • the heat dissipating means be found ⁇ advantageously with the cold spot in Kon ⁇ tact to be directly related to the temperature of the coldest spot in the lamp and thus also on the vapor pressure in the discharge influence.
  • the aforementioned shaping of the discharge vessel for generating the Cold- spots is advantageously arranged at a tip of the discharge vessel in the area of the light exit opening to an optimum convective cooling and a mög ⁇ lichst large distance from the sealed ends of the discharge vessel, in which the during lamp operation hot electrode filaments of the low-pressure discharge lamp are arranged to ensure.
  • the heat dissipating means comprises a grid which is preferably made of metal or a heat conductive plastic material ⁇ .
  • the grid conducts the heat through the Re ⁇ Flektor or a lamp housing to the outside and does not cause significant light obscuration.
  • the grid itself can serve as a heat sink, which is cooled by the circulation with the surrounding air.
  • the heat from ⁇ leading means additionally comprises a heat-conducting adhesive or a heat-conductive paste, which produces an adhesive ⁇ connection between the grid and the discharge vessel.
  • the grid is preferably constructed of light reflec ⁇ rend to achieve an additional light directing We ⁇ effect.
  • the mounting of the discharge vessel of the low-pressure discharge lamp according to the invention is advantageously flexible or resilient construction, in order to compensate any tolerances in the dimensions of the discharge vessel and to ensure in each case that the decision discharge vessel discharging the heat medium, insbeson ⁇ particular the at Light exit opening of the reflector arranged grid, despite the aforementioned tolerances can be brought into contact.
  • the low-pressure discharge lamp according to the invention is designed according to the preferred embodiments as a low-pressure mercury vapor discharge lamp, which has a phosphor coating for the conversion of the light generated by the mercury vapor in the discharge ultraviolet radiation.
  • the discharge vessel of the low-pressure discharge lamp according to the invention advantageously consists of a tubular glass vessel which has at least one helically curved vessel section whose turns run parallel to the optical axis or in the optical axis of the reflector.
  • the discharge vessel has two helically curved vessel sections, each ⁇ Weil have at one of the sealed ends of the discharge vessel their starting point and wind in the direction of the light exit opening with opposite sense of winding around the reflector axis, and by a , the dome of the discharge vessel forming, hollow web are connected to ⁇ each other, so that the discharge vessel has a continuous discharge space which extends from one to the other sealed end of the discharge vessel.
  • the turns in the direction of the tip or the light exit opening of the reflector have decreasing Radii, so that the helical vessel sections appear in a projection on a plane perpendicular to the Re ⁇ reflector axis spiral.
  • Figure 1 is a cross-section through a Niederchristentla ⁇ tion lamp according to the preferredariessbei ⁇ game of the invention in a schematic representation
  • Figure 2 is a plan view of the at the Lichtaustrittsöff ⁇ tion of the illustrated in Figure 1 low-pressure discharge lamp grid
  • Figure 4 is a plan view of an alternative embodiment ⁇ form of the grid for the low-pressure discharge lamp shown in Figure 1
  • Figure 6 is a side view of the mounting of the discharge vessel ⁇ the low-pressure discharge lamp shown in Figure 1
  • FIG. 7 shows a side view of an alternative mounting of the discharge vessel of the low-pressure discharge lamp depicted in FIG. 8 shows the relative luminous flux and the power consumption of the low-pressure discharge lamp according to the invention as a function of the ambient temperature of the lamp
  • FIG. 1 shows a cross section through a low-pressure discharge lamp according to the preferred exporting ⁇ approximately example of the invention schematically.
  • a compact low-pressure discharge lamp in particular a compact fluorescent lamp with a power of 7 W, with ei ⁇ nem housing 1 of plastics material, a screw 2, egg ⁇ nem discharge vessel 3, a cover 4, which together with the housing 1 forms a chamber 10 for the components ei ⁇ nes operating device 5 of the lamp, a holder 40 for the discharge vessel 3 and a grid 6, which is arranged at the light exit opening 7 of the designed as a reflector region 12 of the housing 1 of the low-pressure discharge ⁇ lamp and serves to cool the Entladungsgefä ⁇ SLI 3 or of the cold spot 35 of the lamp.
  • the inside of the housing 1 is provided with a light-reflecting metal layer 11, for example, aluminum layer, the light exit opening 7 and the cover plate 4 lying, designed as a reflector portion 12 of the Ge ⁇ housing 1 surrounds the discharge vessel.
  • the housing 1 is rotationally symmetrical ⁇ formed with respect to the longitudinal axis AA of the lamp.
  • the surface of the cover plate 4 facing the light exit opening 7 is preferably designed to reflect light.
  • the discharge vessel 3 consists of a substantially helically bent glass tube which winds around the longitudinal axis AA of the lamp, wherein the radius of the individual turns in the direction of the light exit opening 7 decreases steadily.
  • the two sealed ends 31, 32 of the discharge vessel 3 each form the starting point for a helically bent discharge vessel ⁇ section 33 and 34, the turns in the direction of the light exit opening 7 with opposite winding sense and each steadily decreasing radius about the longitudinal axis AA Wind the lamp or optical axis of the reflector 12.
  • This helically bent Ent ⁇ charge vessel sections 33, 34 are separated by a plane perpendicular to the longitudinal axis, the longitudinal axis intersecting hollow transverse web 30, which forms the top of the Entla ⁇ manure vessel 3, connected to each other, so that a single, continuous inner space or cavity is formed ,
  • the hollow transverse web 30 has on its side facing the Lichtaus ⁇ outlet opening 7 a bump-like or comb-like shape 35, which is the cold spot of the unloading training vessel 3 and the discharge forms.
  • the ends 31, 32 shown very schematically in FIG. 1 likewise form part of the helically bent discharge vessel sections 33 and 34. In this area, the discharge vessel 3 has the largest outside diameter.
  • the two ends 31, 32 of the discharge vessel 3 have the smallest distance to the cover plate 4.
  • the inside of the sealed discharge vessel 3 is equipped with a phosphor coating.
  • In the interior of the discharge vessel 3 are as Entladungsmedi ⁇ to mercury and a noble gas or a noble gas mixture.
  • an electrode electrode 81, 82 is arranged, each with two power supply wires 91, 92, 93, 94 protruding from the discharge vessel 3. Between the heatable electrode coils 81, 82, a low-pressure gas discharge is formed during lamp operation.
  • the power supply wires 91, 92, 93, 94 are guided through slots 401, 402, 403, 404 in the cover plate 4 in the chamber 10 and elec ⁇ trically conductive with components of the operating device 5 ver ⁇ prevented. Facing away from the cover plate 4 and the light exit opening 7 facing crest of the ⁇ discharge vessel 3, the longitudinal axis formed by an intersecting plane extending perpendicularly to the longitudinal axis in a plane AA discharge vessel portion 30th
  • a web 40 For holding the discharge vessel 3 is a web 40, which extends in the longitudinal axis AA of the lamp and at the ⁇ sen free end a staple-like portion 41 is formed. That facing away from the bracket-like portion 41 End of the web 40 is connected to a step-like protruding from the Ab ⁇ cover plate 4 foot 42.
  • the foot 42 is flat and consists of a spring-trained, narrow plastic strip or sheet metal strip, which is connected only at its end faces with the cover plate 4.
  • the web 40 is arranged centrally between the end faces on which the light exit opening 7 facing side of the plastic or sheet metal strip 42.
  • the strength of the spring action of the discharge vessel holder 4, 40, 41, 42 is determined by the material and the length and the thickness of the foot 42.
  • FIGS. 1-10 show details of this discharge vessel holder.
  • the clamp-like portion 41 of the holder surrounds the tip 30 of the discharge vessel 3 with a press fit.
  • the grating 6 arranged on the light exit opening 7 rests on the dome 30 of the discharge vessel 3 or on the formation 35 and dissipates the heat from the cold spot of the lamp located in the dome 30 or formation 35 to the housing 1.
  • Manufacturing tolerances at the height of the discharge vessel 3 are compensated for by means of the resilient foot 42 of the discharge vessel holder 4, 40, 41, 42. That is, by the resilient foot 42 ge ⁇ ensures that the tip 30 of the discharge vessel 3 and the formation 35 is in any case in contact with the grid 6 in order to ermögli ⁇ chen cooling of the cold spot. Details of the grid 6 are shown in FIGS.
  • the grid 6 is formed by three concentric rings 601, 602, 603, which are fixed by means of two crosswise arranged struts 604, 605.
  • the intersection point 606 of the struts 604, 605 is applied to the Aus ⁇ shaping 35 of the dome 30 of the discharge vessel 3 and forms the center of the concentric rings 601, 602, 603.
  • the grid 6 is preferably made of a material of high thermal conductivity, for example of metal.
  • the intersection point 606 of the struts 604, 605 of the grid 6 is connected by a thermally conductive adhesive to the tip 30 of the discharge vessel 3 and to the formation 35.
  • Figures 4 and 5 show an alternative execution form a ⁇ arranged on the light exit opening 7 of the lamp grid 6 '. It is formed by five concentric rings 601 ', 602', 603 ', 604', 605 ', which are held together by two crosswise arranged struts 606', 607 '.
  • the crossing point 608 'of the struts 606', 607 ' is located in the center of the concentric ⁇ 's rings 601', 602 ', 603', 604 ', 605'.
  • the grid 6 ' is made of metal and has a greater height than the grid 6 according to the first embodiment.
  • the grid 6 ' is formed reflecting light.
  • FIG. 7 shows an alternative embodiment of a discharge vessel holder according to the invention.
  • the discharge vessel mount shown in Figure 7 has the advantage over the embodiment shown in Figure 3 discharge vessel holder the advantage that it in addition to the height adjustment also allows alignment of the discharge vessel 3 in Richtun ⁇ gen perpendicular to the lamp longitudinal axis AA.
  • the discharge vessel holder shown in Figure 7 according to the second embodiment of the invention consists of ei ⁇ nem flexible, curved web 40 ', which is anchored in the cover plate 4'. At the end of the web 40 'opposite the cover plate 4', a clip-like section 41 'is arranged, which supports the tip 30 of the discharge nozzle. vessel 3 clasped.
  • the web 40 ' is preferably formed as a plastic strip.
  • He is resiliently understoodbil ⁇ det and can be deformed preferably, so that the position of the discharge vessel 3 in the housing 1 excluded oriented may be, and the height of the discharge vessel 3 via the cover plate 4 'to the tolerances in the dimen ⁇ measurements of the discharge vessel 3 can be adjusted.
  • the flexible and resilient web 40 'allows the tip 30 and the molding 35 to abut in any case at the crossing or center 606 of the grille 6 and to cool the cold spot of the lamp through the grille 6.
  • the cover plate 4 ' has the same radio ⁇ tion as the cover plate 4 according to the first embodiment ⁇ example.
  • the slots 401 ', 402', 403 ', 404' serve to pass the power supply wires 91 to 94 into the chamber 10.
  • the relative luminous flux (curve K) and power (curve K2) are the Niederlichentla pressure discharge lamp according to the depicted in Figure 1 exemplary for example in function of the ambient temperature of the lamp for a suspended operating position of the lamp, that is, with the Orientation shown in Figure 1 shown orientation. It can be seen that the lamp reaches its maximum luminous flux at ambient temperatures in the range of about 5 0 C to 1O 0 C. If this lamp is operated at room temperature (22 0 C), for example in living areas or showrooms, its luminous flux is still more than 90 percent of its maximum luminous flux.
  • the maximum of the light output lies with this lamp due to the course of the curves Kl and K2 in the temperature range of about 1O 0 C to 15 0 C. It also means that, when schematically illustrated in Figure 1. Low-pressure discharge lamp, the temperature of the cold spot during their operation at ambient temperatures in the range of 5 0 C to 1O 0 C in the optimum temperature range of about 4O 0 C to 5O 0 C. The use of the complex amalgam technology is evidently not necessary in order to shift the maximum of the luminous flux of the lamp to sufficiently high ambient temperatures of the lamp.
  • the intensity of the convection cooling of the cold spot 35 is improved during operation of the lamp in a horizontal position, because the outflowing air can then escape without hindrance Be ⁇ upwards. This leads to egg ner further displacement of the maximum of the light output in the direction of higher temperatures, which then zoom even closer to the normal room temperatures ranging from 2O 0 C to 25 0 C.
  • FIG. 10 shows a comparison of the light distribution curve for three different low-pressure discharge lamps.
  • the curve K5 shows the light intensity in depen ⁇ dependence of the emission angle of the light for the one shown in Figure 1 according to the invention the air.
  • the curve K6 shows the light intensity as a function of the Ausstrahlungs ⁇ angle of the light for a low-pressure discharge lamp according to the prior art (with amalgam lamp technology and glass cover).
  • the curve K7 shows the Lichtstär ⁇ ke in function of the emission angle of the light for a low-pressure discharge lamp with the example shown in Figure 1 structure, but without the grating 6 and without the heat conductive adhesive between the grid 6 and the tip 30 of the discharge vessel.
  • the emission angle is measured with respect to the reflector axis AA and defi nes the opening angle of a cone whose rotation axis ⁇ forms the reflector axis AA. It can be seen that the lamp according to the invention generates the highest light intensity in the main emission direction of the light.
  • the ⁇ ses can be seen as advantageous as reflector lamps are typically used to focus the light in a near-axis area.
  • the invention is not limited to the detailed above embodiments, but may recordings to Never ⁇ derdruckentladungslampe with different power and different shaped discharge vessels be applied.
  • the grid 6 or 6 ' differently designed heat dissipating means or heat sinks can also be used.
  • a phosphor layer instead of the light-reflecting metal layer 11, a phosphor layer may be used.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne une lampe à décharge basse pression présentant une ampoule de décharge (3) étanche à deux extrémités (31, 32) et un réflecteur (12) qui entoure au moins partiellement l'ampoule de décharge (3), un élément d'évacuation de chaleur (6) se trouvant à l'extérieur des extrémités étanches (31, 32) en contact avec l'ampoule de décharge (3).
EP07821428A 2006-10-23 2007-10-17 Lampe à décharge basse pression comprenant un réflecteur Withdrawn EP2054923A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006049896A DE102006049896A1 (de) 2006-10-23 2006-10-23 Niederdruckentladungslampe mit Reflektor
PCT/EP2007/061063 WO2008049765A2 (fr) 2006-10-23 2007-10-17 Lampe à décharge basse pression comprenant un réflecteur

Publications (1)

Publication Number Publication Date
EP2054923A2 true EP2054923A2 (fr) 2009-05-06

Family

ID=38820314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07821428A Withdrawn EP2054923A2 (fr) 2006-10-23 2007-10-17 Lampe à décharge basse pression comprenant un réflecteur

Country Status (4)

Country Link
EP (1) EP2054923A2 (fr)
CN (1) CN101517696B (fr)
DE (1) DE102006049896A1 (fr)
WO (1) WO2008049765A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049897A1 (de) * 2006-10-23 2008-04-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Reflektorlampe
DE102006049898A1 (de) * 2006-10-23 2008-04-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe mit gebogenem Lampengefäß
DE102010002378A1 (de) * 2010-02-26 2011-09-01 Osram Gesellschaft mit beschränkter Haftung Lampe, insbesondere Flachlampe, mit einer Lichtquelle und einem elektronischen Betriebsgerät

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5651609A (en) * 1994-12-06 1997-07-29 Pelton; Bruce A. Convection venting lensed reflector-type compact fluorescent lamp system
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
US20030223230A1 (en) * 2002-05-31 2003-12-04 Qingsong Li Compact fluorescent lamp
JP3687851B2 (ja) * 2003-01-28 2005-08-24 松下電器産業株式会社 発光管の製造方法
JP4723802B2 (ja) * 2003-09-02 2011-07-13 パナソニック株式会社 発光管、低圧水銀ランプ、照明装置、冶具及び発光管の製造方法
JP4520330B2 (ja) * 2004-03-16 2010-08-04 パナソニック株式会社 低圧水銀蒸気放電ランプ
WO2005099360A2 (fr) * 2004-04-15 2005-10-27 Singlights Pte Ltd Ampoule electrique
DE102006049897A1 (de) * 2006-10-23 2008-04-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Reflektorlampe
DE102006049898A1 (de) * 2006-10-23 2008-04-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe mit gebogenem Lampengefäß

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008049765A2 *

Also Published As

Publication number Publication date
CN101517696A (zh) 2009-08-26
WO2008049765A3 (fr) 2009-01-15
CN101517696B (zh) 2010-10-27
DE102006049896A1 (de) 2008-04-24
WO2008049765A2 (fr) 2008-05-02

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