WO2008046770A2 - Niederdruckentladungslampe - Google Patents
Niederdruckentladungslampe Download PDFInfo
- Publication number
- WO2008046770A2 WO2008046770A2 PCT/EP2007/060737 EP2007060737W WO2008046770A2 WO 2008046770 A2 WO2008046770 A2 WO 2008046770A2 EP 2007060737 W EP2007060737 W EP 2007060737W WO 2008046770 A2 WO2008046770 A2 WO 2008046770A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- low
- discharge lamp
- fluid
- discharge vessel
- pressure discharge
- Prior art date
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
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
Definitions
- the invention relates to a low-pressure discharge lamp, which can be designed with electrodes or electrodeless and whose ionizable filling requires an elevated temperature for emission.
- mercury and sodium low-pressure lamps are frequently used.
- the monochromatic yellow-emitting sodium low-pressure lamps are of limited use due to the lack of color rendering properties.
- a wide field of application is mercury low-pressure lamps, which are also referred to as fluorescent lamps, in which the ultraviolet radiation generated in the discharge space with the resonance lines of 254 nm and 185 nm with the aid of applied to the discharge vessel phosphors is convertible into visible radiation.
- Mercury is preferred for low-pressure discharge lamps because the luminous flux is maximal at an ambient temperature of approximately 25 ° C.
- mercury has increasingly been regarded as an environmentally harmful and toxic substance that is to be avoided in modern mass production, also with regard to the problem-free disposal of lighting fixtures.
- mercury-free high-pressure lamps are known in which the photometric and electrical properties of typical metal halide high-pressure lamps are obtained. Due to the different requirements for high-pressure lamps and low-pressure lamps, the mercury-free filling and the design of the discharge vessel can not be transferred to low-pressure lamps.
- the invention is based on the object
- Low-pressure discharge lamp has a fluid and a discharge vessel in which an ionizable filling is present.
- the ionizable filling has a noble gas or a mixture of several noble gases with a pressure between 0.1 and 100 hPa and an emitting substance for generating the radiation required for the phosphor excitation.
- the surface temperature of the discharge vessel is at least partially adjustable.
- the emitting substance comprises at least one metal halide, a metal and / or an organometallic compound (for example chelate) of the metals Fe, Co, Ni, Cu, Al, Ga, In, Ti, Ge, Sn, Se, Te, Cr has.
- an organometallic compound for example chelate
- the surface temperature at the coldest point of the discharge vessel is adjustable and when the fluid is high temperature resistant.
- high surface temperatures at the discharge vessel can be adjusted with respect to optimum vapor pressure conditions for the desired molecular mixture of the ionizable filling.
- a temperature adjusting device is provided, via which the temperature of the fluid in the range of 150 to 350 0 C to ⁇ 25k is precisely adjustable. This can be implemented over a longer period optimal light yields.
- the fluid is preferably transparent or translucent and preferably has a silicone oil, whereby an accurate temperature control can be implemented without greatly reducing the luminous efficacy.
- the fluid may be located in an enveloping body that surrounds the discharge vessel at least in sections. so that the energy loss during heating of the discharge vessel can be minimized.
- a phosphor layer is provided, which is applied at least in sections to the inner circumference of the discharge vessel.
- the conversion of emitted radiation into visible radiation occurs at the discharge vessel.
- the fluid has a phosphor admixture, by means of which the radiation produced in the discharge vessel can be converted into visible radiation.
- the fluid has a double function: both
- the enveloping body may be surrounded at least in sections by a vacuum jacket which minimizes the heat radiation from the discharge lamp.
- the discharge vessel is preferably rod-shaped, ring-shaped or U-shaped, so that comparable fields of use as with conventional fluorescent lamps are possible.
- the discharge lamp is electrodeless, wherein the discharge vessel is configured in such a way that results in a toroidal gas discharge volume and the discharge is triggered by inductive coupling. Furthermore, it is preferred if the discharge lamp is designed to be electrodeless, the discharge vessel is formed substantially spherical and the Discharge via inductive coupling is triggered. In this way, cylindrical or spherical discharge vessels can be implemented without additionally introduced electrodes, ie with a homogeneous inner surface.
- FIG. 1A shows a mercury-free low-pressure discharge lamp according to the first
- Fig. 2 is a mercury-free low-pressure discharge lamp according to the second embodiment
- Fig. 3 is a mercury-free low-pressure discharge lamp according to the third embodiment.
- a lamp according to the invention will now be described with reference to the first embodiment shown in FIG. 1A.
- the lamp according to the invention according to the first embodiment is a mercury-free low-pressure discharge lamp 1.
- the lamp 1 has a tubular discharge vessel 2, the two end portions 4, 6 are gas-tight. With the Ends 4, 6 of the discharge vessel 2, an electrode frame 8, 10 fused in each case.
- the electrode racks 8, 10 each have an electrode coil 12, 14 and two power supply wires 16a, 16b, 18a, 18b electrically connected to the ends of the electrode coil 12, 14.
- the electrode coils 12, 14 are arranged in the interior 20 of the discharge vessel 2 and transversely to the longitudinal axis of the discharge vessel 2.
- mercury-free, emissive substances as ionizable filling in the form of noble gas-molecular gas mixtures.
- This mixture has a base gas in the form of a noble gas or a noble gas mixture, for example of at least one of the noble gases Ar, Ne, He, Xe, Kr, in a pressure range typically from 0.1 to 100 hPa.
- a noble gas or a noble gas mixture for example of at least one of the noble gases Ar, Ne, He, Xe, Kr, in a pressure range typically from 0.1 to 100 hPa.
- at least one metal halide and / or one of the metals Fe, Co, Ni, Cu, Al, Ga, In, Ti, Ge, Sn, Se, Te, Cr is present in the filling gas. It is preferred if the metal is in the form of organometallic chelate compounds.
- the discharge vessel 2 of the first embodiment is formed, for example, with a diameter of 25mm and a length of 200 mm.
- the ionizable filling in the interior has in this example Ar at a pressure of 2.5 hPa and a mixture of InBr and InCl and metallic In with 0.2mg each.
- the discharge vessel 2 is surrounded over its entire longitudinal axis by a thin-walled enveloping body 22, in which a temperature-controllable, high-temperature-resistant fluid 24, which is transparent in the visible and near the UV region, is located.
- This fluid 24 surrounds the discharge chamber 2 including the cold spot and is for example silicone oil, in particular methylphenylpolysiloxanes.
- the fluid layer around the vessel has a layer thickness of approximately 0.1 to 3 mm and is circulated by a pump 26 via a heater 28.
- the pump 26 is, for example, a diaphragm pump or a vane pump.
- In the heat cycle is located near the fluid outlet from the enveloping body 22 further includes a temperature sensor 30 whose output signal passes to an electrical control circuit, not shown in Fig. IA, in which, for example, set a predetermined temperature of about 22O 0 C ⁇ 15K in the fluid through the heater 28 becomes.
- an electrical control circuit not shown in Fig. IA, in which, for example, set a predetermined temperature of about 22O 0 C ⁇ 15K in the fluid through the heater 28 becomes.
- the heater 28, the pump 26 and the temperature sensor 30 are in Fig. 1 in a base of the low-pressure lamp 1 at an end portion 4 adjacent to the electrode coil 8 and allow the discharge vessel is constantly flowed around by the fluid, so that a desired temperature at Discharge vessel is present.
- a heat exchanger can be provided, can be used by the heat from the electrode coils 12, 14 and the power supply wires 16a, 16b in the fluid 24.
- a coiled running thinner For the heater 28, including the radiant heater, a coiled running thinner
- Discharge vessel can be used.
- This heating wire or this resistance layer can be in direct contact with the fluid used, so that a uniform and energy-efficient heating of the fluid
- a phosphor coating 32 which converts the radiation emitted by the gas discharge from the ionizable filling into visible light.
- the radiation emitted from the discharge is in the excitation range of the phosphor of the phosphor coating.
- the discharge vessel 2 and the enveloping body 22 surrounds a vacuum envelope 34, which is delimited by an outer body 36.
- an infrared reflecting layer is applied, through which the infrared radiation generated in the discharge vessel and passing through the enveloping body 22 is reflected back to the discharge vessel 2.
- the fluid 24 is subjected to a rapid heating with an increased volume flow generated by the pump 26, so that the heating time to the optimum temperature is low.
- the electrode coil 12, 14, Before the ignition of the discharge lamp, the electrode coil 12, 14, for example, by preheating, to a temperature of about 850 to 900 0 C preheated.
- the coldest point of the discharge vessel in accordance with the optimum vapor pressure conditions for the ionizable filling.
- the sections of the discharge vessel along which the radiation-exciting discharge occurs may be tempered higher by up to 50-75K than the temperature-controlled coldest point.
- a precise temperature control for the fluid 24 in the enveloping body 22 can be reduced to a temperature control substantially in the region of the cold spot of the discharge vessel.
- the remaining areas of the wall of the discharge vessel thus have a temperature increased by 25-75K.
- the optimal cold spot can be actively activated by means of a temperature control of the fluid 24. Temperature of the discharge lamp can be adjusted so that even with significantly reduced discharge power optimal radiation efficiency can be achieved from the discharge.
- no phosphor coating 32 is provided on the enveloping body 22, but in the fluid circulated in the enveloping body 22 are phosphor particles, for example in the form of a solid powder mixture, which distribute themselves uniformly around the discharge vessel due to the fluid flow and which function have the phosphor coating 32, ie due to the discharge in the discharge vessel discharge are excited to glow in the visible range.
- the first embodiment described above relates to a low-pressure discharge lamp with electrode coil for ignition and for energy coupling.
- the present invention is not limited thereto, but any electrical or electromagnetic excitation methods for ignition and energy coupling can be used in any discharge vessel. This will be described below by way of example with reference to the second and third embodiments.
- FIG. 2 shows an electrodeless low-pressure discharge lamp 100 according to the second exemplary embodiment with a cylinder-like discharge vessel 102 into which an inner recess 104 for an elongated coil 106 is inserted.
- This coil 106 has a primary winding 108.
- the primary winding 108 is connected at its ends with a high-frequency supply, so that around the primary winding around a high-frequency magnetic field is generated with which in a toroidal region 110 of the interior 120 of the discharge vessel 102, the discharge is maintained.
- the type of ionizable filling and the enveloping body 122 with a fluid 124, which flows around the discharge vessel 102 by a pump 126, the temperature sensor 130 as a sensor for temperature control, the phosphor coating 132 on the envelope 122, the vacuum envelope 134 and the outer body 136 with infrared coating 138th correspond to the comparable elements of the first embodiment, so that reference is made with respect to the operation of the first embodiment.
- the discharge vessel 202 is formed spherical.
- the ionizable filling is provided in the interior 220 and the discharge vessel 202 is surrounded by a fluid 224 received by an enveloping body 222.
- a conductor path 206 is screw-shaped, to which a high-frequency voltage can be applied via two power supply wires 216a, 216b, whereby a high-frequency magnetic field in the discharge vessel 202 can be generated.
- This magnetic field maintains a discharge in the region 210 in the interior 220 of the discharge vessel 202.
- an extension piece 208 with two fluid supply lines 208a, 208b is provided on the enveloping body 222, which guides cooled fluid away from the outer wall of the discharge vessel and directs heated fluid toward the outer wall of the discharge vessel.
- the attachment piece 208 allows fluid 224 to flow away from the outer wall of the discharge vessel 202 and to bring it to a predetermined temperature before it again flows to the outer wall of the discharge vessel.
- the phosphor coating 232 on the enveloping body 222, the vacuum envelope 234, the outer body 236 and the infrared coating 238 are spherical in the third embodiment, but functionally equivalent to those of the first embodiment, so that a detailed description will be omitted.
- the power input into the discharge is typically 2-50W in the given volume, while the electromagnetic energy input is through an alternating electric field in the range of about 50Hz - 3GHz.
- the present invention is not limited to the shape of discharge vessel, enveloping body and outer body of the first to third embodiments, but there may be any shapes and dimensions of these discharge vessel / body, provided a mercury-free low-pressure discharge lamp with adjustable surface temperature of the discharge vessel can be implemented.
- the invention thus relates to a mercury-free low-pressure discharge lamp with a discharge vessel in which an ionizable filling is present.
- the surface temperature of the discharge vessel and thus the temperature of the ionizable filling can be set at least in sections so that an emitting substance can generate the radiation required for the phosphor excitation.
- the fluid temperature is preferably controlled by a temperature control loop using a temperature sensor, a pump and a heater.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009532771A JP2010507204A (ja) | 2006-10-17 | 2007-10-10 | 低圧放電ランプ |
US12/311,271 US7969074B2 (en) | 2006-10-17 | 2007-10-10 | Low pressure discharge lamp |
CN200780035138.3A CN101517697B (zh) | 2006-10-17 | 2007-10-10 | 低压放电灯 |
EP07821105A EP2054922A2 (de) | 2006-10-17 | 2007-10-10 | Niederdruckentladungslampe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006048983A DE102006048983A1 (de) | 2006-10-17 | 2006-10-17 | Niederdruckentladungslampe |
DE102006048983.7 | 2006-10-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008046770A2 true WO2008046770A2 (de) | 2008-04-24 |
WO2008046770A3 WO2008046770A3 (de) | 2008-12-04 |
Family
ID=38820297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/060737 WO2008046770A2 (de) | 2006-10-17 | 2007-10-10 | Niederdruckentladungslampe |
Country Status (6)
Country | Link |
---|---|
US (1) | US7969074B2 (de) |
EP (1) | EP2054922A2 (de) |
JP (1) | JP2010507204A (de) |
CN (1) | CN101517697B (de) |
DE (1) | DE102006048983A1 (de) |
WO (1) | WO2008046770A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8896191B2 (en) | 2011-07-11 | 2014-11-25 | Osram Sylvania Inc. | Mercury-free discharge lamp |
US9117649B2 (en) * | 2012-12-11 | 2015-08-25 | General Electric Company | Resistive thin layer heating of fluorescent lamp |
US8994288B2 (en) | 2013-03-07 | 2015-03-31 | Osram Sylvania Inc. | Pulse-excited mercury-free lamp system |
DE102020103656A1 (de) * | 2020-02-12 | 2021-08-12 | Peschl Ultraviolet Gmbh | UV-Lampenmodul und UV-Desinfektionsvorrichtung |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2765416A (en) * | 1953-09-24 | 1956-10-02 | Westinghouse Electric Corp | Vapor lamps utilizing chemical compounds |
US3657590A (en) * | 1970-06-26 | 1972-04-18 | Gen Electric | High intensity far u.v. radiation source |
EP0698914A1 (de) * | 1992-12-15 | 1996-02-28 | Matsushita Electric Works, Ltd. | Elektrodenlose Entladungslampe |
US6072268A (en) * | 1992-04-13 | 2000-06-06 | Fusion Lighting, Inc. | Lamp apparatus and method for re-using waste light |
DE10129464A1 (de) * | 2001-06-19 | 2003-01-02 | Philips Corp Intellectual Pty | Niederdruckgasentladungslampe mit quecksilberfreier Gasfüllung |
US20060132042A1 (en) * | 2004-12-20 | 2006-06-22 | General Electric Company | Mercury-free and sodium-free compositions and radiation source incorporating same |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4916352A (en) * | 1988-11-07 | 1990-04-10 | General Electric Company | Jacketed fluorescent lamps |
US4949003A (en) * | 1988-12-21 | 1990-08-14 | Gte Products Corporation | Oxygen protected electric lamp |
US5572083A (en) * | 1992-07-03 | 1996-11-05 | U.S. Philips Corporation | Electroless low-pressure discharge lamp |
JP2781115B2 (ja) * | 1992-12-15 | 1998-07-30 | 松下電工株式会社 | 無電極放電灯 |
JPH097550A (ja) * | 1995-06-13 | 1997-01-10 | Sadami Fujii | 紫外線ランプ |
JP3032144B2 (ja) * | 1995-09-22 | 2000-04-10 | 定美 藤井 | 無電極紫外線ランプ装置とその使用法 |
DE19731168A1 (de) | 1997-07-21 | 1999-01-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Beleuchtungssystem |
JPH11250866A (ja) * | 1998-02-27 | 1999-09-17 | Yamaura Corp | 無電極ランプ装置 |
JP4421177B2 (ja) * | 2001-12-27 | 2010-02-24 | 東芝ライテック株式会社 | 電球形蛍光ランプおよび照明器具 |
JP2004342549A (ja) * | 2003-05-19 | 2004-12-02 | Osram-Melco Ltd | 片口金形蛍光ランプ及びアマルガム過冷却防止材及び遮風材の使用及び片口金形蛍光ランプのアマルガムの過冷却を防止する方法 |
JP2005285689A (ja) * | 2004-03-30 | 2005-10-13 | Osram-Melco Ltd | 片口金蛍光ランプ |
US20080030115A1 (en) * | 2004-06-03 | 2008-02-07 | Milhail Erofeev | Barrier Discharge Lamp |
-
2006
- 2006-10-17 DE DE102006048983A patent/DE102006048983A1/de not_active Withdrawn
-
2007
- 2007-10-10 US US12/311,271 patent/US7969074B2/en not_active Expired - Fee Related
- 2007-10-10 WO PCT/EP2007/060737 patent/WO2008046770A2/de active Application Filing
- 2007-10-10 CN CN200780035138.3A patent/CN101517697B/zh not_active Expired - Fee Related
- 2007-10-10 EP EP07821105A patent/EP2054922A2/de not_active Withdrawn
- 2007-10-10 JP JP2009532771A patent/JP2010507204A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2765416A (en) * | 1953-09-24 | 1956-10-02 | Westinghouse Electric Corp | Vapor lamps utilizing chemical compounds |
US3657590A (en) * | 1970-06-26 | 1972-04-18 | Gen Electric | High intensity far u.v. radiation source |
US6072268A (en) * | 1992-04-13 | 2000-06-06 | Fusion Lighting, Inc. | Lamp apparatus and method for re-using waste light |
EP0698914A1 (de) * | 1992-12-15 | 1996-02-28 | Matsushita Electric Works, Ltd. | Elektrodenlose Entladungslampe |
DE10129464A1 (de) * | 2001-06-19 | 2003-01-02 | Philips Corp Intellectual Pty | Niederdruckgasentladungslampe mit quecksilberfreier Gasfüllung |
US20060132042A1 (en) * | 2004-12-20 | 2006-06-22 | General Electric Company | Mercury-free and sodium-free compositions and radiation source incorporating same |
Also Published As
Publication number | Publication date |
---|---|
US7969074B2 (en) | 2011-06-28 |
CN101517697B (zh) | 2010-10-20 |
CN101517697A (zh) | 2009-08-26 |
JP2010507204A (ja) | 2010-03-04 |
EP2054922A2 (de) | 2009-05-06 |
US20090273267A1 (en) | 2009-11-05 |
DE102006048983A1 (de) | 2008-04-24 |
WO2008046770A3 (de) | 2008-12-04 |
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