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WO2009146945A2 - Lampe à amalgame de mercure avec chemin de décharge coudé - Google Patents

Lampe à amalgame de mercure avec chemin de décharge coudé Download PDF

Info

Publication number
WO2009146945A2
WO2009146945A2 PCT/EP2009/004072 EP2009004072W WO2009146945A2 WO 2009146945 A2 WO2009146945 A2 WO 2009146945A2 EP 2009004072 W EP2009004072 W EP 2009004072W WO 2009146945 A2 WO2009146945 A2 WO 2009146945A2
Authority
WO
WIPO (PCT)
Prior art keywords
amalgam
piston
radiator
discharge space
electrodes
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.)
Ceased
Application number
PCT/EP2009/004072
Other languages
German (de)
English (en)
Other versions
WO2009146945A3 (fr
Inventor
Dirk Riepe
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.)
Wedeco AG
Original Assignee
Wedeco AG
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 Wedeco AG filed Critical Wedeco AG
Publication of WO2009146945A2 publication Critical patent/WO2009146945A2/fr
Publication of WO2009146945A3 publication Critical patent/WO2009146945A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01J61/24—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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path

Definitions

  • the present invention relates to a UV radiator of the type of mercury low pressure amalgam radiator having the features of the preamble of claim 1.
  • Mercury low-pressure lamps have long been used in lighting technology as fluorescent lamps as well as in environmental technology. In the first application, the resulting UV radiation is absorbed by a phosphor, which in turn emits visible light. In the second application, the UV radiation is used for disinfection purposes. Mercury low pressure emitters emit a high efficiency UV line at 253.7 nm.
  • the efficiency of such a radiator depends inter alia on the pressure of the available mercury. In the case of high-power radiators, this is regulated by an amalgam depot, for example indium amalgam, inside the radiator.
  • amalgam lamps used for disinfection purposes are:
  • radiators are preferably arranged in flow channels of drinking water and wastewater disinfection systems, in which they are aligned horizontally and in which the liquid flow is parallel to the longitudinal axis of the radiator.
  • the flow is relatively slow, so that the residence time of the liquid to be disinfected and the harmful organisms contained therein is sufficiently large to reliably inactivate them even with a limited intensity of UV radiation.
  • medium-pressure lamps are used. These medium-pressure lamps are characterized by a high UV intensity in a wide spectral range. The electrical efficiency and the yield in the essential for disinfection purposes wavelength range but is significantly lower than low-pressure radiators. The use of medium-pressure lamps therefore increases the operating costs, in particular due to the relatively high energy consumption.
  • An amalgam radiator with a folded discharge path as a fluorescent lamp is known from the published patent application DE 2725412 A1.
  • a folded Endladungsweg is provided by the fact that within a closed outer tube, a second tube is arranged, which is tightly inserted on the base and at the opposite end is free to communicate with the interior of the outer tube.
  • the inner space and the outer space are each contacted with an electrode in the base area, so that the discharge path initially runs back through the inner tube and then through the outer space.
  • This arrangement is provided on the inside of the outer glass bulb with a phosphor which converts the resulting UV radiation into visible light.
  • the amalgam is intended to be mounted in the form of dots on a metal plate which is fixed to a relatively cold spot in the lamp by means of a support wire at the top of the inner tube.
  • a folded discharge chamber amalgam radiator can be provided which can deliver higher UV emission performance measured along the length of the radiator than with elongated ones , Both sides contacted mercury low pressure amalgam radiators is possible. Another advantage is that this radiator is suitable for a suspended mounting, in which the electrodes are arranged at the top and the amalgam is arranged at the bottom.
  • the known amalgam radiator could hitherto only be used horizontally in water treatment systems, since the amalgam is in operation in the liquid state of aggregation and even with vibrations there is a risk that the amalgam will fall off.
  • An embodiment which allows a uniformly uniform radiation in the circumferential direction provides that the piston has an internal partition which extends from the electrodes into the discharge space and which ends at a distance from the other end. It is advantageous if the partition wall divides the discharge space into two approximately equal half-spaces, which are only at the other end, where the amalgam is, for gas exchange with each other.
  • the piston can have an embossing or constriction introduced from outside to inside, on the inside of which the amalgam deposit is arranged.
  • the amalgam deposit then projects into the discharge space and is advantageously reached by the discharge. This promotes the release of gaseous mercury during operation.
  • an electrical heating element be arranged ment that is in heat-conducting contact with the piston. With such a heating element, the temperature of the amalgam, depending on an electronic control, can be increased specifically.
  • both semi-spaces bounded by the dividing wall radiate almost isotropically.
  • the UV radiation of one half-space can penetrate the other half space undisturbed.
  • the partition wall is UV-reflective. Then, each half-space of the discharge space radiates only in an angle of approximately 180 ° in the circumferential direction. Losses are negligible as the UV photons emitted towards the bulkhead are reflected and not absorbed.
  • the low-pressure amalgam radiator can achieve a radiant power that is sufficient even for high flow velocities in closed channels.
  • the vertical, hanging arrangement of the radiator can be selected, in which the amalgam depot is arranged at the bottom of the radiator and even with vibration and mechanical shocks no danger exists that the amalgam liquid in operation drops from the intended installation point.
  • the emitter is designed in this way very robust and can be used with a few adjustments in applications where otherwise medium - pressure radiation would be required.
  • FIG. 1 shows the electrode region of a cylindrical radiator with a central dividing wall in a longitudinal section
  • Fig. 2 the closed end of the radiator of Figure 1 in a longitudinal section.
  • FIG. 3 shows the radiator according to FIG. 1 and FIG. 2 in a cross section along the line III-III; such as
  • FIG. 4 shows another embodiment of the closed end of a radiator according to FIG. 1.
  • the piston 1 is tapered and surrounds gas-tight two connection lines 2 for electrical contacts 3.
  • the connection lines 2 are fused into the quartz glass of the piston 1.
  • the contacts 3 are mechanically supported by a preferably made of ceramic base 4.
  • the piston 1 further surrounds a discharge space 5, into which two electrodes 6 and 7 protrude.
  • the electrodes 6 and 7 are electrically contacted with the connection lines 2.
  • the electrodes 6 and 7 are formed in a conventional manner from wire as a helix and coated with a material that promotes the electron emission.
  • Between the electrodes 6 and 7 is a partition wall 8, which divides the discharge space 5 into two half-spaces 10 and 11.
  • the partition wall 8 is in the base area with the outer wall of the piston 1 and the connecting lines. gen 2 fused gas-tight.
  • the piston 1 is circular-cylindrical along the discharge path, so that the flat partition 8, the half-spaces 10 and 11 in cross-section approximately semi-circular limits.
  • the partition 8 ends at a distance from a closed end 12 of the piston 1.
  • the end 12 has an indentation 13, on the inside of which an amalgam deposit 14 is arranged.
  • the distance between a free end 15 of the partition wall 8 and the amalgam deposit 14 is selected so that the resulting free cross section corresponds approximately to the cross section of the discharge chambers 10 and 11, so a substantially undisturbed gas, electron and ion exchange between the half-spaces 10 and 11 is possible.
  • an electric heating element 20 is arranged, which is connected via connecting lines 21 and 22 with a power supply (not shown).
  • the heating element 20 is adapted to heat the amalgam 14 when energized, for example, to ensure sufficient mercury vapor pressure at the start of the UV lamp already.
  • FIG. 3 shows a cross section through the radiator in the region of the dividing wall 8, that is to say for example along the line III-III from FIG. 1.
  • the dividing wall 8 is integral with the piston 1, as can be achieved, for example, by extrusion.
  • the resulting half-spaces 10 and 11 are, as described above, in this cross-section approximately semicircular.
  • Fig. 4 shows another embodiment of the closed end 12 of the radiator. Same components bear the same reference numbers.
  • the amalgam deposit 25 is annularly placed between two constrictions 26.
  • the constrictions 26 are two annular umlaut fende heating elements 27, which can be supplied via connecting lines 28 with power.
  • the amalgam deposit 25 can be preheated via the heating elements 27.
  • the constrictions 26 secure the amalgam against dropping in vibration.
  • the illustrated vertical mounting position in which the closed end 12 of the piston 1 is down, however, it is also harmless if a part of the amalgam 25 drops during operation and collects down in the region of the end 12. At this point, the amalgam still achieves the required operating temperature during operation, so that the radiation power of the UV emitter is not impaired by the falling off of a part of the amalgam.
  • the illustrated radiator can be exposed to the maximum current currently achievable with low-pressure amalgam UV emitters for UV disinfection applications.
  • the crucial components, the gas filling, the electrodes and the amalgam, are identical to the known kangge- stretched radiators.
  • the discharge length is almost twice as large as the overall length of the radiator. For a given length therefore a nearly twice as large radiant power is achieved.
  • the radiator is very insensitive to vibrations and vibrations due to the described arrangement of the electrodes and the amalgam depot.

Landscapes

  • Physical Water Treatments (AREA)
  • Discharge Lamp (AREA)

Abstract

L’invention concerne une lampe basse pression à amalgame de mercure dotée d’un piston cylindrique comportant deux extrémités et transparent aux rayons ultraviolets. Une extrémité du piston porte les électrodes et l’autre extrémité du piston est pourvue du dépôt d’amalgame. On obtient de cette manière une lampe aux dimensions compactes, particulièrement robuste, en particulier en cas de montage suspendu.
PCT/EP2009/004072 2008-06-05 2009-06-05 Lampe à amalgame de mercure avec chemin de décharge coudé Ceased WO2009146945A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008026904.2 2008-06-05
DE200810026904 DE102008026904A1 (de) 2008-06-05 2008-06-05 Quecksilberamalgamstrahler mit gefaltetem Entladungsweg

Publications (2)

Publication Number Publication Date
WO2009146945A2 true WO2009146945A2 (fr) 2009-12-10
WO2009146945A3 WO2009146945A3 (fr) 2010-03-11

Family

ID=41263675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/004072 Ceased WO2009146945A2 (fr) 2008-06-05 2009-06-05 Lampe à amalgame de mercure avec chemin de décharge coudé

Country Status (2)

Country Link
DE (1) DE102008026904A1 (fr)
WO (1) WO2009146945A2 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR747223A (fr) 1931-12-23 1933-06-13 Osa Participations Ind Tube électrique luminescent
US2121333A (en) 1934-06-23 1938-06-21 Fed Electric Company Inc Gaseous conduction device
BE393137A (fr) 1948-10-01
NL179771C (nl) 1976-06-17 1986-11-03 Philips Nv Lagedrukgasontladingslamp.
NL7812539A (nl) * 1978-02-14 1979-08-16 Philips Nv Lagedrukkwikdampontladingslamp.
US4184101A (en) 1978-07-11 1980-01-15 Westinghouse Electric Corp. Compact fluorescent lamp having a partitioned envelope
US4835442A (en) * 1987-01-29 1989-05-30 Kabushiki Kaisha Toshiba Lamp for generating ultraviolet radiation
US5095336A (en) * 1990-11-08 1992-03-10 Xerox Corporation Temperature control of a fluorescent lamp having a central and two end amalgam patches
US5739633A (en) * 1995-08-14 1998-04-14 General Electric Company Amalgam containing compact fluorescent lamp with improved warm-up
JP2000173537A (ja) * 1998-09-29 2000-06-23 Toshiba Lighting & Technology Corp 低圧水銀蒸気放電灯および照明装置
US6597105B1 (en) * 1999-04-22 2003-07-22 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp with amalgam container
DE10201617C5 (de) * 2002-01-16 2010-07-08 Wedeco Ag Water Technology Amalgamdotierter Quecksilberniederdruck-UV-Strahler
DE20213210U1 (de) * 2002-08-28 2004-01-08 Advanced Uv Light Gmbh Quecksilber-Niederdruck-Entladungslampe
US7095167B2 (en) * 2003-04-03 2006-08-22 Light Sources, Inc. Germicidal low pressure mercury vapor discharge lamp with amalgam location permitting high output
DE10349237A1 (de) * 2003-10-20 2005-05-12 Wedeco Ag Strahlereinheit mit lagejustierbarem Strahler
DE102006033674A1 (de) * 2006-07-20 2008-01-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe mit einem Entladungsgefäß

Also Published As

Publication number Publication date
DE102008026904A1 (de) 2009-12-31
WO2009146945A3 (fr) 2010-03-11

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