WO2009153030A1 - Procédé de fonctionnement d'une lampe basse pression au mercure, lampe basse pression au mercure à démarrage rapide et utilisation de celle-ci. - Google Patents

Procédé de fonctionnement d'une lampe basse pression au mercure, lampe basse pression au mercure à démarrage rapide et utilisation de celle-ci. Download PDF

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Publication number
WO2009153030A1
WO2009153030A1 PCT/EP2009/004362 EP2009004362W WO2009153030A1 WO 2009153030 A1 WO2009153030 A1 WO 2009153030A1 EP 2009004362 W EP2009004362 W EP 2009004362W WO 2009153030 A1 WO2009153030 A1 WO 2009153030A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
current
phase
low
pressure
Prior art date
Application number
PCT/EP2009/004362
Other languages
German (de)
English (en)
Inventor
Alex Voronov
Karsten Ernesti
Original Assignee
Heraeus Noblelight 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 Heraeus Noblelight Gmbh filed Critical Heraeus Noblelight Gmbh
Priority to EP09765610A priority Critical patent/EP2289290A1/fr
Publication of WO2009153030A1 publication Critical patent/WO2009153030A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • H05B41/386—Controlling the intensity of light during the transitional start-up phase for speeding-up the lighting-up

Definitions

  • the present invention relates to a method for operating a mercury low-pressure lamp with a lamp bulb, in which two electrodes are arranged and in which a gas discharge is generated by applying a lamp current.
  • the invention relates to a quick-start mercury low-pressure lamp comprising a lamp bulb, in which two electrodes are arranged and in which a gas discharge can be generated by applying a lamp current.
  • the invention involves the use of the quick-start mercury low-pressure lamp for sterilizing a medium, such as air, water or surfaces.
  • Mercury low pressure lamps offer excellent efficiency. About 40% of the electrical power is converted to UV-C radiation at 254 nm. These lamps are used for the sterilization of air, water and surfaces. Typical fields of application are drinking water sterilization and process water treatment in industry, water disinfection in fish farming, but also desi- air in air-conditioning and cooling systems, removal of organic substances from exhaust gases, such as fume hoods, and surface disinfection.
  • the object of the invention is therefore to provide a mode of operation for a low-pressure mercury lamp, with which the lamp reaches the full UV performance after a short time.
  • the invention has for its object to provide a low-pressure mercury lamp, which allows an operation in which already after a short time Switch-on time the full UV power is available.
  • a "quick-start mercury low pressure lamp” is also referred to below as “quick start lamp”.
  • the invention is further based on the object of specifying a suitable use for such a quick start lamp.
  • this object is achieved on the basis of a method of the type mentioned in the present invention, that in a starting phase of the lamp current compared to that in a subsequent operating phase is substantially increased.
  • the method according to the invention for operating a mercury lamp provides for a start phase preceding the actual operating phase, in which the lamp current is markedly increased in comparison to the subsequent operating phase. It has been found that such an increase results in, for example, a standard UV lamp having a starting current of approximately 2 A for 3-5 seconds at a lamp current of 425 mA. The increased lamp current ensures that despite the non-optimal vapor pressure of mercury in the radiator enough and virtually immediate UV light is produced. After 3-5 seconds, the radiator is already heated so high that the optimum vapor pressure is reached and the lamp current is reduced to normal level in the operating phase, which is at 0.2 A to 1, 0 A.
  • start-up time shortens from approx. 3 minutes to 0.5 seconds and thus the lamp can develop its full UV output after just half a second.
  • a substantial increase in the lamp current in the starting phase is understood as meaning an increase in the lamp current which permits a sufficient shortening of the starting time with regard to the intended use of the low-pressure mercury lamp high requirements for the shortening of the start-up period, the current in the start-up phase can be many times higher than the nominal current in the operating phase, for example at 2 to 10 times.
  • the lamp current in the starting phase has a current of 0.5 to 5 A, preferably from 1 to 3 A, more preferably at least 2 A.
  • the starting phase has a duration of 0.5 to 60 seconds, preferably from 0.5 to 8 seconds, preferably 2 seconds or more, more preferably from 3 to 6 seconds.
  • a starting phase with a duration of more than 60 seconds the additional effort for the shortening of the starting phase is hardly worthwhile.
  • the mode of operation according to the invention proves to be particularly advantageous in those low-pressure mercury lamps in which the lamp current in the operating phase has a current of 425 mA.
  • the current of the Lamp current in the starting phase in the range of 2 to 10 times, preferably in the range of 3 to 5 times, the current level in the operating phase.
  • the starting phase comprises a preheating phase for heating at least one of the electrodes by applying heating current.
  • the electrodes can be heated by means of an additional heating current.
  • the electrodes are often designed as heating coils.
  • the electrodes are first flowed through by the heating current in order to heat them.
  • the heating current for heating the electrodes is not part of the lamp current in the sense of the invention.
  • the usual duration of the preheating phase is in the range of seconds and may thus be longer than is desirable for operation of the quick-start lamp in the sense of the invention.
  • the excessive lamp current is in any case withdrawn in the operating phase in order to limit or prevent overheating of the low-pressure mercury lamp and a concomitant drop in power.
  • the above-mentioned technical problem starting from a quick-start lamp of the type mentioned is inventively achieved in that the electrodes with a current of 1, 0 to 5.0 A, preferably from 1, 5 to 4.0 A. are operable.
  • the mercury low-pressure lamp according to the invention is equipped with electrodes which withstand an increased lamp current during a starting phase.
  • the quick start lamp is suitable for carrying out the method according to the invention explained above.
  • a control device is provided, by means of which the lamp current is increased in a starting phase compared to that in a subsequent operating phase, and that the electrodes are operable in the starting phase with a higher lamp current than in the subsequent operating phase.
  • the lamp current in the starting phase with a current of 0.5 to 5 A, preferably from 1 to 3 A, more preferably 2 A or more, adjustable.
  • the electrodes of the quick-start lamp according to the invention are preferably designed such that they withstand a lamp current in the starting phase of 1, 0 A to 5.0 A preferably 1.5 to 4.0 A. This amperage is necessary to achieve as fast as possible the full UV performance of the mercury low pressure lamps. After reaching the optimum vapor pressure of mercury, the mercury low-pressure lamp according to the invention is operated in the operating phase, which are usually 0.2 A to 1, 0 A.
  • the quick start lamp according to the invention is thus able to withstand higher currents for brief moments and thus to reach the normal operating state much faster.
  • UV-C radiation is particularly suitable for killing microorganisms. Therefore, mercury low pressure lamps are known to be extensively used for the sterilization of liquids such as drinking or waste water, gases, such as in air conditioners or in fume hoods or for the sterilization of man-made waters and drinking water and for sterilizing the air, such as in air conditioners or the exhaust air of fume hoods and of surfaces such as in germ-sensitive medical fields or filters and the like.
  • the nominal UV power is available in a particularly short time after switching on.
  • the above-mentioned object with regard to the use of the quick-start lamp according to the invention is achieved in that the quick start lamp is used as part of a switchable system, wherein the quick start lamp is started by switching on the system and simultaneously a relative movement between the medium and the quick start lamp for the purpose of sterilization is generated.
  • the relative movement between the medium to be sterilized and the quick-start lamp is generally carried out by movement of the medium, for example by a flow of a gaseous or liquid medium, along the lamp.
  • the system can be, for example, a drinking water supply system or an air purification system.
  • the quick start lamp is part of the drinking water supply system and is used in the context of this system so that at the same time the mercury low-pressure lamp according to the invention is turned on by switching on the drinking water supply and the flow of drinking water.
  • FIG. 1 shows a diagram with the time profile of the power supply and the resulting time course of the UV-C emission in a low-pressure mercury lamp according to the invention
  • Figure 2 is a diagram showing the time course of the power supply and the resulting time course of the UV-C emission in a conventional mercury low-pressure lamp
  • Figure 3 shows an embodiment of the quick start lamp according to the invention in the form of a low-pressure mercury lamp with optional preheating the
  • the lamp current rises to 2 A immediately after switching on the lamp.
  • the start-up phase is thus significantly shortened, so that the lamp can already develop its full UV-C power after about half a second.
  • the lamp current is reduced to the nominal value of 0.425 A. As a result, the intensity of the UV-C emission no longer changes and remains constant over time.
  • the quick start lamp is used to disinfect the water in a drinking water supply system. It is used in such a way that it is switched on immediately when the drinking water supply is started up. Since the lamp provides the required for sterilization UV-C power after a short time, the passage of not or insufficiently sterilized drinking water is minimized.
  • FIG. 3 schematically shows the ends of the discharge space 7 of a low-pressure mercury lamp 1 (represented by a broken line), which has a nominal power of 10 W (with a nominal lamp current of 425 mA), a radiator length of 20 cm and thus a power density of approximately 0 , 5 W / cm.
  • a quartz glass tube 4 attached to its Ends with bruises 2 is closed, are embedded in the molybdenum foils 3 and the ends of metallic terminals to a helical electrode 5a, 5b.
  • the electrodes 5a, 5b have "legs" 6, which are connected to the molybdenum foil 3. Between the electrodes 5a, 5b, an arc is generated during operation.
  • the electrodes 5a, 5b are provided with an emitter paste, which is fixed by means of a basket wire.
  • the diameters of wicker wire and electrode wire are reinforced, so that these components withstand a current of 2 A.
  • the power supply of the low-pressure mercury lamp 1 comprises a first circuit "A” which serves to heat the electrodes 5a, 5b and which is referred to herein as a "heating current circuit”.
  • the power supply of the low-pressure mercury lamp 1 comprises a second circuit "B", which serves to apply the lamp current and which is referred to below as the "lamp circuit”.
  • the circuits "A” and “B” are part of a control device 8.
  • a lamp current of 2 A is set, as shown in the diagram of Figure 1.
  • the lamp current which is increased from the usual value of 0.425 A, is maintained during a 2 second start-up phase. This results in a rapid increase of the UV-C emission to a setpoint value corresponding to the lamp type (as shown in FIG. 1). Subsequently, the control device 8 reduces the increased lamp current to the nominal lamp current in the operating phase (425 mA) in order to prevent excessive heating of the lamp 1 and damage to the electrodes 5a, 5b.
  • the quick start lamp according to the invention can also be operated as a hot cathode lamp by during a preheat on the electrodes 5a, 5b via the circuit "A" an additional heating current is passed, which leads to an increase in temperature of the electrodes 5a, 5b.

Abstract

Dans le procédé traditionnel de fonctionnement d'une lampe basse pression au mercure avec une ampoule dans laquelle sont disposées deux électrodes, une décharge dans le gaz produite en appliquant un courant constant n'atteint sa valeur de consigne qu'après un certain délai. Pour obtenir un mode de fonctionnement d'une lampe basse pression à mercure où la lampe atteint sa pleine puissance ultraviolette après un bref délai, il est proposé, selon l'invention, que le courant de lampe soit considérablement augmenté au cours d'une phase de démarrage par rapport à celui de la phase de fonctionnement suivante.
PCT/EP2009/004362 2008-06-19 2009-06-17 Procédé de fonctionnement d'une lampe basse pression au mercure, lampe basse pression au mercure à démarrage rapide et utilisation de celle-ci. WO2009153030A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09765610A EP2289290A1 (fr) 2008-06-19 2009-06-17 Procédé de fonctionnement d'une lampe basse pression au mercure, lampe basse pression au mercure à démarrage rapide et utilisation de celle-ci.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008028833 2008-06-19
DE102008028833.0 2008-06-19

Publications (1)

Publication Number Publication Date
WO2009153030A1 true WO2009153030A1 (fr) 2009-12-23

Family

ID=41055085

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/004362 WO2009153030A1 (fr) 2008-06-19 2009-06-17 Procédé de fonctionnement d'une lampe basse pression au mercure, lampe basse pression au mercure à démarrage rapide et utilisation de celle-ci.

Country Status (3)

Country Link
EP (1) EP2289290A1 (fr)
DE (1) DE102008037250A1 (fr)
WO (1) WO2009153030A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230792A (en) * 1990-01-24 1993-07-27 Christian Sauska Ultraviolet water purification system with variable intensity control
US5324423A (en) * 1993-02-11 1994-06-28 Amway Corporation UV bulb intensity control for water treatment system
US5738780A (en) * 1995-08-02 1998-04-14 Amway Corporation Voltage converter for water treatment system UV bulb
US5907742A (en) * 1997-03-09 1999-05-25 Hewlett-Packard Company Lamp control scheme for rapid warmup of fluorescent lamp in office equipment
US5914871A (en) * 1998-07-13 1999-06-22 Mustek Systems, Inc. Device for multi-stage illuminance control for light source of scanner
FR2805957A1 (fr) * 2000-03-02 2001-09-07 Sagem Dispositif d'alimentation de lampe d'eclairage notamment pour scanner
EP2009896A1 (fr) * 2007-06-27 2008-12-31 Samsung Electronics Co., Ltd. Appareil de balayage d'images et procédé correspondant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230792A (en) * 1990-01-24 1993-07-27 Christian Sauska Ultraviolet water purification system with variable intensity control
US5324423A (en) * 1993-02-11 1994-06-28 Amway Corporation UV bulb intensity control for water treatment system
US5738780A (en) * 1995-08-02 1998-04-14 Amway Corporation Voltage converter for water treatment system UV bulb
US5907742A (en) * 1997-03-09 1999-05-25 Hewlett-Packard Company Lamp control scheme for rapid warmup of fluorescent lamp in office equipment
US5914871A (en) * 1998-07-13 1999-06-22 Mustek Systems, Inc. Device for multi-stage illuminance control for light source of scanner
FR2805957A1 (fr) * 2000-03-02 2001-09-07 Sagem Dispositif d'alimentation de lampe d'eclairage notamment pour scanner
EP2009896A1 (fr) * 2007-06-27 2008-12-31 Samsung Electronics Co., Ltd. Appareil de balayage d'images et procédé correspondant

Also Published As

Publication number Publication date
DE102008037250A1 (de) 2009-12-31
EP2289290A1 (fr) 2011-03-02

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