EP0079849B1 - Low-vapour pressure lamp - Google Patents

Low-vapour pressure lamp Download PDF

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Publication number
EP0079849B1
EP0079849B1 EP82730134A EP82730134A EP0079849B1 EP 0079849 B1 EP0079849 B1 EP 0079849B1 EP 82730134 A EP82730134 A EP 82730134A EP 82730134 A EP82730134 A EP 82730134A EP 0079849 B1 EP0079849 B1 EP 0079849B1
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EP
European Patent Office
Prior art keywords
burner
low
flat burner
flat
contact
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EP82730134A
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German (de)
French (fr)
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EP0079849A3 (en
EP0079849A2 (en
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Georg Horstmann
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/02Details
    • H01J61/52Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/70Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr

Definitions

  • the invention relates to a low-pressure steam lamp, in particular a low-pressure mercury lamp with a lamp tube designed as a flat burner, which is surrounded by a cladding tube.
  • low-pressure steam lamps of this type usually consist of a quartz tube filled with metal vapor with a vapor pressure of, for example, 0.1 torr, with two electrodes at the ends, the lamp tube being designed with an elongated, flat cross section, which is why the term "flat burner" is used.
  • Low-pressure vapor lamps have a very large proportion of low-pressure mercury lamps because they are very suitable devices for generating UV radiation.
  • the light they emit is namely a pure line spectrum, which has a high UV component and has a particularly strong line at 254 nm.
  • the flat burner is usually surrounded by a jacket tube also made of quartz, and the burner arrangement consisting of jacket tube and flat burner can then be immersed in water to be sterilized.
  • the cladding tube is designed as a round tube because it provides optimal protection against the surrounding water pressure.
  • the flat burner itself located in the cladding tube can therefore be built relatively thin-walled.
  • the flat burner also produces a line spectrum of 183 nm, although not as intense, which can be used to generate ozone that supports the disinfection and sterilization process.
  • Cooling has also become known from US Pat. No. 4,071,799, the lamp tube of a low-pressure sodium vapor lamp being in contact with a reflector acting as a heat sink within a cladding tube.
  • the result of the cooling is that an excess of sodium located in the lamp tube and regulating the vapor pressure is condensed.
  • the radiation intensity which is impaired by absorption of the sodium's own emission spectrum, is compensated for by the condensation of the excess sodium.
  • the invention is therefore based on the object, while avoiding the disadvantages described, of creating a low-pressure vapor lamp in which an increase in the radiation intensity is possible with simple means.
  • the invention achieves this goal in an astonishingly simple manner in that the flat burner is at least partially in contact with the inner wall of the cladding tube.
  • the invention is based on the surprising finding that, by touching the flat burner with the cladding tube, cooling can take place through the medium surrounding the cladding tube and to be sterilized or sterilized. As has been found in experiments, this so-called “contact cooling” can achieve a considerable increase in the radiation intensity. This is all the more surprising since both the cladding tube and the jacket of the flat burner each consist of quartz - a poor heat conductor. Obviously, the gas in the flat burner cools down so far at the points of contact of the flat burner with the cladding tube that a higher energy supply and thus a higher emitted radiation intensity is possible.
  • the contact is linear in the direction of the longitudinal axes of the flat burner and the cladding tube, so that there is practically a contact line along the surface of the flat burner.
  • a line-shaped contact with the cladding tube cannot always be realized for manufacturing reasons, since both the inside wall of the cladding tube and the outside wall of the flat burner may have slight unevenness.
  • the contact is limited to a large number of discrete points of contact. But here too, tests have led to the astonishing result that even then there is sufficient contact cooling, so that one can do without the complex external cooling.
  • the flat burner is provided with several sleeves, which are arranged around the outer wall and brought into contact with the cladding tube.
  • the flat burner is arranged to be displaceable transversely to its longitudinal axis within the cladding tube and can be fixed in different positions. In its one position - transport position - the flat burner is located in the center of the cladding tube in a known manner, so that contact with the cladding tube is avoided. After transport and commissioning, the flat burner is then moved to the other position and fixed where it is in the desired contact with the cladding tube.
  • the novel contact cooling created by the invention can be so effective that when switching on the low pressure steam lamp u.
  • the optimal operating temperature of the gas in the flat burner may not be reached. Therefore, a further expedient embodiment of the invention provides the possibility of not allowing the desired contact cooling to take effect until a certain temperature has been reached.
  • a bimetal can be used which, when a predetermined temperature value is reached, causes the flat burner to be moved into a position in which the flat burner is in contact with the cladding tube.
  • the low-pressure lamp 1 shown in the drawing comprises a flat burner 2 with an oblong-flat cross section.
  • the flat burner 2 the outer wall of which is made of quartz, is surrounded in the usual way by a round cladding tube 4 - also made of quartz.
  • a reaction chamber 28 connects to the cladding tube (see FIG. 3), which receives the medium, for example water, which is to be subjected to UV radiation for the purpose of disinfection and sterilization.
  • the medium for example water
  • FIG. 3 a total of four cladding tubes 4, each arranged at an angle of 90 ° to one another, with flat burners 2 located therein are provided, two of which can be seen in the cross-sectional illustration.
  • a sensor 18 for the UV radiation occurring at this point is located approximately in the middle of the reaction space 28.
  • the reactor 30, which is constructed in a manner known per se, has a cover 32 and a housing 40.
  • the cladding tubes 4 are held within a flange 34 which is connected to a flange ring 36 via a screw connection 38. Seals 24 and 26 are provided for sealing the reaction space 28.
  • each flat burner 2 has at its outer ends a base 20 with electrodes 22 for the flat burner 2 (only one end of the flat burner 2 is shown in the figures) , so that only one base 20 can be seen in each case).
  • the flat burners 2 located within the cladding tubes 4 are now held via a disk-shaped burner holder 10, which is arranged at the two ends of the cladding tube 4.
  • the flat burner 2 is connected to the two burner holders 10 at the outer ends via the electrodes 22 which engage in corresponding openings in the burner holder 10.
  • the burner holders 10 - and, of course, also those connected to them standing flat burner 2 - in a direction indicated by the arrow 12 can be moved both to the left and to the right.
  • the direction of displacement is preferably selected transversely to the direction in which the flat burner 2 extends with its elongated cross section.
  • the burner holders 10 are each provided with two elongated holes 14 which extend in the direction of the arrow 12.
  • a pin 16 engages in each elongated hole 14, as a result of which clear guidance is achieved during the displacement of the burner holder 10.
  • two different end positions of the burner holder 10 are marked by the pins 16 arranged in a fixed position relative to the burner holders 10, namely when the pins 16 are located at one or the other end of the elongated hole.
  • the burner holder 10 can be fixed in the two end positions by screws, not shown, so that the flat burner is also firmly held in the two different positions.
  • the burner holder 10 is in a first fixed position, which is assigned a central arrangement of the flat burner 2 within the tube 4. In this previously customary position of the flat burner 2, transport can also be carried out without any problems, since the flat burner 2 is not in contact with the cladding tube 4.
  • the length of the elongated holes 14 is thus chosen taking into account the diameter of the pins 16 such that - starting from the position in FIG. 1 - when the burner holder 10 is moved in the direction of the arrow 12, the flat burner 2 comes into contact with the cladding tube 4, without causing any damage.
  • the flat burner 2 is surrounded by sleeves 42 arranged at a distance from one another.
  • the flat burner 2 can be displaced by means of the burner holder 10 to such an extent that the sleeves 42 bear against the inner wall of the cladding tube 4, which then also results in the desired contact cooling.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Eye Examination Apparatus (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Display Devices Of Pinball Game Machines (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

1. Low-pressure vapour lamp, especially mercury low-pressure vapour lamp, comprising a lamp tube formed as a flat burner (2), which is surrounded by a casing tube, characterized in that the flat burner (2) is at least partly in contact (6, 8) with the inside wall of the casing tube (4).

Description

Die Erfindung betrifft eine Niederdruckdampflampe, insbesondere Quecksilber-Niederdruckdampflampe mit einem als Flachbrenner ausgebildeten Lampenrohr, das von einem Hüllrohr umgeben ist.The invention relates to a low-pressure steam lamp, in particular a low-pressure mercury lamp with a lamp tube designed as a flat burner, which is surrounded by a cladding tube.

Bekanntlich bestehen Niederdruckdampflampen dieser Art üblicherweise aus einem mit Metalldampf mit einem Dampfdruck um beispielsweise 0,1 Torr gefüllten Quarzrohr mit zwei endseitigen Elektroden, wobei das Lampenrohr mit einem länglich-flachen Querschnitt ausgebildet ist, weshalb man auch die Bezeichnung «Flachbrenner» verwendet.As is known, low-pressure steam lamps of this type usually consist of a quartz tube filled with metal vapor with a vapor pressure of, for example, 0.1 torr, with two electrodes at the ends, the lamp tube being designed with an elongated, flat cross section, which is why the term "flat burner" is used.

Zwischen den Elektroden bildet sich im Betrieb eine Bogenentladung aus, die zur Lichterzeugung ausgenutzt wird. Unter den Niederdruckdampflampen haben die Quecksilber-Niederdrucklampen einen sehr grossen Anteil, weil sie sehr geeignete Geräte zur Erzeugung von UV-Strahlung darstellen. Das von ihnen ausgesandte Licht ist nämlich ein reines Linienspektrum, welches einen hohen UV-Anteil aufweist und bei 254 nm eine besonders starke Linie besitzt.During operation, an arc discharge forms between the electrodes, which is used to generate light. Low-pressure vapor lamps have a very large proportion of low-pressure mercury lamps because they are very suitable devices for generating UV radiation. The light they emit is namely a pure line spectrum, which has a high UV component and has a particularly strong line at 254 nm.

Die Durchführung von fotochemischen Reaktionen mit Hilfe von UV-Strahlung gewinnt in neuerer Zeit eine zunehmende Bedeutung, wobei fotochemische Entkeimungs- und Sterilisierungsvorgänge ein besonders wichtiges Gebiet darstellen. Eine Anzahl dieser Reaktionen, und vor allem auch die fotochemischen Entkeimungs- und Sterilisierungsvorgänge zeigen eine ausgeprägte Abhängigkeit von der Strahlungsintensität, so dass es entscheidend auf eine möglichst hohe Strahlungsintensität und Leistung ankommt. Das ist darauf zurückzuführen, dass die betreffenden Reaktionen eine gleichzeitige Anwesenheit einer bestimmten Mindestzahl von (z.B. 4 oder 5) Lichtquanten an der zu reagierenden Molekülstelle benötigen und deshalb bei Anwendung einer Strahlung geringer Intensität, die diese Mindestzahl von Lichtquanten nicht gleichzeitig zur Verfügung zu stellen vermag, nicht ablaufen können. Hier hilft es dann auch nicht, wenn man beispielsweise die Bestrahlungsdauer verlängert.The implementation of photochemical reactions with the aid of UV radiation has recently become increasingly important, with photochemical sterilization and sterilization processes being a particularly important area. A number of these reactions, and above all the photochemical sterilization and sterilization processes show a pronounced dependence on the radiation intensity, so that the highest possible radiation intensity and power are crucial. This is due to the fact that the reactions in question require a simultaneous presence of a certain minimum number (for example 4 or 5) of light quanta at the molecular site to be reacted and therefore when using radiation of low intensity which this minimum number of light quanta cannot simultaneously provide , cannot expire. It does not help here, for example, if you increase the radiation duration, for example.

Üblicherweise ist der Flachbrenner von einem ebenfalls aus Quarz bestehenden Hüllrohr umgeben, und die aus Hüllrohr und Flachbrenner bestehende Brenneranordnung lässt sich dann in zu entkeimendes Wasser eintauchen. Im Gegensatz zum länglich-flachen Querschnitt des Flachbrenners wird das Hüllrohr als rundes Rohr ausgebildet, weil dadurch ein optimaler Schutz gegen den umgebenden Wasserdruck hergestellt werden kann. Der in dem Hüllrohr befindliche Flachbrenner selbst kann also relativ dünnwandig gebaut werden.The flat burner is usually surrounded by a jacket tube also made of quartz, and the burner arrangement consisting of jacket tube and flat burner can then be immersed in water to be sterilized. In contrast to the flat, elongated cross-section of the flat burner, the cladding tube is designed as a round tube because it provides optimal protection against the surrounding water pressure. The flat burner itself located in the cladding tube can therefore be built relatively thin-walled.

Neben den erwähnten 254 nm erzeugt der Flachbrenner übrigens auch noch ein-wenn auch nicht so intensives - Linienspektrum mit 183 nm, wodurch sich den Entkeimungs- und Sterilisierungsvorgang unterstützendes Ozon erzeugen lässt.In addition to the 254 nm mentioned, the flat burner also produces a line spectrum of 183 nm, although not as intense, which can be used to generate ozone that supports the disinfection and sterilization process.

Der immer wichtiger werdenden Bedeutung der bekannten Niederdruckdampflampen steht allerding auch heute noch immer der Umstand entgegen, dass die zur wirksamen Entkeimung und Sterilisierung erforderliche Strahlungsintensität nicht ohne weiteres erreicht werden kann. Eine erhöhte Strahlungsintensität über eine grössere Energiezufuhr lässt sich nämlich nur dann erreichen, wenn gleichzeitig für eine ausreichende Kühlung der Niederdrucklampe gesorgt wird. Durch die DE-OS 2 825 018 ist zwar schon eine recht wirksame Kühlung mit der Folge einer Erhöhung der Strahlungsintensität bekannt geworden, wobei längs der Schmalseiten des Flachbrenners besondere Kühlrohre vorgesehen sind, jedoch handelt es sich hier um eine Fremdkühlung, die einen zusätzlichen Aufwand an der Brennervorrichtung erfordert. Man hat sich weiterhin auch schon damit beholfen, die Strahlung mehrerer Lampen gegebenenfalls unter Zuhilfenahme von Reflektoren in das gleiche Reaktionsvolumen zu bündeln, was aber ebenfalls recht aufwendig ist und auch zu einer schlechten Energiebilanz führt.However, the increasing importance of the known low-pressure steam lamps is still opposed to the fact that the radiation intensity required for effective disinfection and sterilization cannot be easily achieved. An increased radiation intensity through a greater energy supply can only be achieved if sufficient cooling of the low-pressure lamp is ensured at the same time. From DE-OS 2 825 018, quite effective cooling with the consequence of an increase in the radiation intensity has already become known, special cooling tubes being provided along the narrow sides of the flat burner, but this is an external cooling system which involves an additional outlay the burner device requires. It has also been used to bundle the radiation from several lamps into the same reaction volume, if necessary with the aid of reflectors, but this is also quite complex and also leads to a poor energy balance.

Durch die US-A-4 071 799 ist auch eine Kühlung bekannt geworden, wobei das Lampenrohr einer Natriumniederdruckdampflampe in Berührung mit einem als Wärmesenke wirkenden Reflektor innerhalb eines Hüllrohres steht. Die Kühlung hat zur Folge, dass ein sich in dem Lampenrohr befindender und den Dampfdruck regelnder Überschuss an Natrium kondensiert wird. Die durch Absorption des eigenen Emissionsspektrums von Natrium beeinträchtigte Strahlungsintensität wird durch die Kondensation des Natriumüberschusses kompensiert.Cooling has also become known from US Pat. No. 4,071,799, the lamp tube of a low-pressure sodium vapor lamp being in contact with a reflector acting as a heat sink within a cladding tube. The result of the cooling is that an excess of sodium located in the lamp tube and regulating the vapor pressure is condensed. The radiation intensity, which is impaired by absorption of the sodium's own emission spectrum, is compensated for by the condensation of the excess sodium.

Der Erfindung liegt daher die Aufgabe zugrunde, unter Vermeidung der geschilderten Nachteile eine Niederdruckdampflampe zu schaffen, bei der mit einfachen Mitteln eine Erhöhung der Strahlungsintensität möglich ist.The invention is therefore based on the object, while avoiding the disadvantages described, of creating a low-pressure vapor lamp in which an increase in the radiation intensity is possible with simple means.

Dieses Ziel erreicht die Erfindung in verblüffend einfacher Art dadurch, dass der Flachbrenner zumindest teilweise in Kontakt mit der Innenwand des Hüllrohres steht.The invention achieves this goal in an astonishingly simple manner in that the flat burner is at least partially in contact with the inner wall of the cladding tube.

Der Erfindung liegt die überraschende Erkenntnis zugrunde, dass durch die Berührung des Flachbrenners mit dem Hüllrohr eine Kühlung durch das das Hüllrohr umgebende und zu entkeimende bzw. zu sterilisierende Medium erfolgen kann. Wie in Versuchen festgestellt worden ist, lässt sich durch diese sogenannte «Kontaktkühlung» eine beträchtliche Erhöhung der Strahlungsintensität erreichen. Dies ist umso überraschender, als sowohl das Hüllrohr und auch die Umhüllung des Flachbrenners jeweils aus Quarz - also einem schlechten Wärmeleiter - bestehen. Ganz offensichtlich kühlt sich das in dem Flachbrenner befindliche Gas an den Berührungsstellen des Flachbrenners mit dem Hüllrohr so weit ab, dass eine höhere Energiezufuhr und damit auch eine höhere abgegebene Strahlungsintensität möglich wird.The invention is based on the surprising finding that, by touching the flat burner with the cladding tube, cooling can take place through the medium surrounding the cladding tube and to be sterilized or sterilized. As has been found in experiments, this so-called “contact cooling” can achieve a considerable increase in the radiation intensity. This is all the more surprising since both the cladding tube and the jacket of the flat burner each consist of quartz - a poor heat conductor. Obviously, the gas in the flat burner cools down so far at the points of contact of the flat burner with the cladding tube that a higher energy supply and thus a higher emitted radiation intensity is possible.

Besonders günstige Werte lassen sich mit der erfindungsgemässen Niederdruckdampflampe erzielen, wenn das das Hüllrohr umgebende Medium-meistens Wasser-eine maximale Temperatur von 25°C nicht überschreitet.Particularly favorable values can be achieved with the low-pressure steam lamp according to the invention if the Me dium-mostly water-does not exceed a maximum temperature of 25 ° C.

Durch die einfache Massnahme, den Flachbrenner innerhalb des Rohres in Berührung mit dem umgebenden Hüllrohr zu bringen, lässt sich also auf die bekannte Fremdkühlung verzichten, bei der sich zwar ebenfalls die gewünschte Erhöhung der Strahlungsintensität erreichen lässt, die aber einen nicht unerheblichen Aufwand an zusätzlichen Teilen und damit auch an Kosten mit sich bringt, während bei der vorgeschlagenen Kontaktkühlung lediglich für eine Berührung des Flachbrenners mit dem Hüllrohr gesorgt zu werden braucht.The simple measure of bringing the flat burner inside the tube into contact with the surrounding cladding tube makes it possible to dispense with the known external cooling, in which the desired increase in radiation intensity can also be achieved, but which involves a not inconsiderable amount of additional parts and thus also involves costs, while in the case of the proposed contact cooling, it is only necessary to ensure that the flat burner comes into contact with the cladding tube.

Gemäss einer vorteilhaften Weiterbildung der Erfindung wird der Kontakt linienförmig in Richtung der Längsachsen des Flachbrenners und des Hüllrohres ausgebildet, so dass sich praktisch eine Kontaktlinie längs der Oberfläche des Flachbrenners ergibt. In manchen Fällen lässt sich allerdings aus herstellungstechnischen Gründen ein solcher linienförmiger Kontakt mit dem Hüllrohr nicht immer realisieren, denn sowohl die Innenwand des Hüllrohres als auch die Aussenwand des Flachbrenners können gegebenenfalls geringfügige Unebenheiten aufweisen. In diesem Fall beschränkt sich dann der Kontakt auf eine Vielzahl diskreter Berührungspunkte. Aber auch hier haben Versuche zu dem verblüffenden Ergebnis geführt, dass selbst dann noch eine ausreichende Kontaktkühlung gegeben ist, so dass man auf die aufwendige Fremdkühlung verzichten kann.According to an advantageous development of the invention, the contact is linear in the direction of the longitudinal axes of the flat burner and the cladding tube, so that there is practically a contact line along the surface of the flat burner. In some cases, however, such a line-shaped contact with the cladding tube cannot always be realized for manufacturing reasons, since both the inside wall of the cladding tube and the outside wall of the flat burner may have slight unevenness. In this case, the contact is limited to a large number of discrete points of contact. But here too, tests have led to the astonishing result that even then there is sufficient contact cooling, so that one can do without the complex external cooling.

Eine andere vorteilhafte Möglichkeit zur Realisierung der Kontaktkühlung besteht darin, dass der Flachbrenner mit mehreren Manschetten versehen ist, die um die Aussenwand angeordnet sind und in Berührung mit dem Hüllrohr gebracht werden.Another advantageous possibility for realizing the contact cooling is that the flat burner is provided with several sleeves, which are arranged around the outer wall and brought into contact with the cladding tube.

Um eventuell mögliche Beschädigungen beim Transport der Niederdrucklampe zu vermeiden, sieht eine andere vorteilhafte Weiterbildung der Erfindung vor, dass der Flachbrenner innerhalb des Hüllrohres quer zu seiner Längsachse verschiebbar angeordnet ist und in unterschiedlichen Positionen fixiert werden kann. In seiner einen Stellung - Transportstellung - befindet sich der Flachbrenner in bekannter Weise mittig innerhalb des Hüllrohres, so dass eine Berührung mit dem Hüllrohr vermieden ist. Nach dem Transport und bei Inbetriebnahme wird der Flachbrenner dann in die andere Position gefahren und fixiert, wo er in der gewünschten Berührung mit dem Hüllrohr steht.In order to avoid possible damage during transport of the low-pressure lamp, another advantageous development of the invention provides that the flat burner is arranged to be displaceable transversely to its longitudinal axis within the cladding tube and can be fixed in different positions. In its one position - transport position - the flat burner is located in the center of the cladding tube in a known manner, so that contact with the cladding tube is avoided. After transport and commissioning, the flat burner is then moved to the other position and fixed where it is in the desired contact with the cladding tube.

Die durch die Erfindung geschaffene neuartige Kontaktkühlung kann von so effektiver Wirkung sein, dass beim Einschalten der Niederdruckdampflampe u. U. gar nicht die optimale Betriebstemperatur des Gases in dem Flachbrenner erreicht wird. Deshalb sieht eine weitere zweckmässige Ausgestaltung der Erfindung die Möglichkeit vor, die gewünschte Kontaktkühlung erst nach Erreichen einer bestimmten Temperatur wirksam werden zu lassen. Zu diesem Zweck lässt sich ein Bimetall verwenden, welches bei Erreichen eines vorgegebenen Temperaturwertes eine Verschiebung des Flachbrenners in eine Position bewirkt, in welcher der Flachbrenner in Kontakt mit dem Hüllrohr steht.The novel contact cooling created by the invention can be so effective that when switching on the low pressure steam lamp u. The optimal operating temperature of the gas in the flat burner may not be reached. Therefore, a further expedient embodiment of the invention provides the possibility of not allowing the desired contact cooling to take effect until a certain temperature has been reached. For this purpose, a bimetal can be used which, when a predetermined temperature value is reached, causes the flat burner to be moved into a position in which the flat burner is in contact with the cladding tube.

Andere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Other advantageous embodiments of the invention are specified in the subclaims.

Anhand des in der Zeichnung dargestellten Ausführungsbeispiels wird die Erfindung nachfolgend zum besseren Verständnis näher erläutert.Based on the embodiment shown in the drawing, the invention is explained in more detail below for better understanding.

Es zeigen:

  • Fig. 1 und 2 je eine schematische Querschnittsansicht längs der Schnittlinie A-B in Fig. 3 zur Verdeutlichung zweier unterschiedlicher Positionen eines Flachbrenners innerhalb eines Hüllrohres,
  • Fig. 3 eine teilweise Querschnittsansicht eines Reaktors mit mehreren Niederdruckdampflampen, und
  • Fig. 4 die schematische Darstellung eines Flachbrenners mit auf dem Aussenmantel angebrachten Manschetten.
Show it:
  • 1 and 2 each a schematic cross-sectional view along the section line AB in Fig. 3 to illustrate two different positions of a flat burner within a cladding tube,
  • 3 is a partial cross-sectional view of a reactor with a plurality of low pressure steam lamps, and
  • Fig. 4 is a schematic representation of a flat burner with sleeves attached to the outer jacket.

Die zeichnerisch dargestellte Niederdrucklampe 1 umfasst einen Flachbrenner 2 mit einem länglich-flachen Querschnitt. Der Flachbrenner 2, dessen Aussenwandung aus Quarz besteht, ist in üblicher Weise von einem runden Hüllrohr 4 - ebenfalls aus Quarz - umgeben.The low-pressure lamp 1 shown in the drawing comprises a flat burner 2 with an oblong-flat cross section. The flat burner 2, the outer wall of which is made of quartz, is surrounded in the usual way by a round cladding tube 4 - also made of quartz.

Aussen schliesst sich an das Hüllrohr ein Reaktionsraum 28 an (vergl. Fig. 3), welcher das einer UV-Strahlung zum Zwecke der Entkeimung und Sterilisierung zu unterwerfende Medium - beispielsweise Wasser - aufnimmt. In Fig. 3 sind insgesamt vier, jeweils in einem Winkel von 90° zueinander angeordnete Hüllrohre 4 mit darin befindlichen Flachbrennern 2 vorgesehen, von denen in der Querschnittsdarstellung zwei zu erkennen sind. Etwa in der Mitte des Reaktionsraumes 28 befindet sich ein Sensor 18 für die an dieser Stelle auftretende UV-Strahlung.On the outside, a reaction chamber 28 connects to the cladding tube (see FIG. 3), which receives the medium, for example water, which is to be subjected to UV radiation for the purpose of disinfection and sterilization. In FIG. 3, a total of four cladding tubes 4, each arranged at an angle of 90 ° to one another, with flat burners 2 located therein are provided, two of which can be seen in the cross-sectional illustration. A sensor 18 for the UV radiation occurring at this point is located approximately in the middle of the reaction space 28.

Der in an sich bekannter Weise aufgebaute Reaktor 30 besitzt einen Deckel 32 und ein Gehäuse 40. Die Hüllrohre 4 sind innerhalb eines Flansches 34 gehalten, der über eine Schraubverbindung 38 mit einem Flanschring 36 in Verbindung steht. Zur Abdichtung des Reaktionsraumes 28 sind Dichtungen 24 und 26 vorgesehen.The reactor 30, which is constructed in a manner known per se, has a cover 32 and a housing 40. The cladding tubes 4 are held within a flange 34 which is connected to a flange ring 36 via a screw connection 38. Seals 24 and 26 are provided for sealing the reaction space 28.

Wie weiterhin in Fig. 3 - und auch in Fig. 4 - zu erkennen ist, besitzt jeder Flachbrenner 2 an seinem äusseren Enden einen Sockel 20 mit Elektroden 22 für den Flachbrenner 2 (in den Figuren ist jeweils nur das eine Ende der Flachbrenner 2 dargestellt, so dass auch jeweils nur ein Sockel 20 zu erkennen ist).As can also be seen in FIG. 3 - and also in FIG. 4 - each flat burner 2 has at its outer ends a base 20 with electrodes 22 for the flat burner 2 (only one end of the flat burner 2 is shown in the figures) , so that only one base 20 can be seen in each case).

Die innerhalb der Hüllrohre 4 befindlichen Flachbrenner 2 sind nun über einen scheibenförmig ausgebildeten Brennerhalter 10 gehalten, der jeweils an den beiden Enden des Hüllrohres 4 angeordnet ist. Über die Elektroden 22, die in entsprechende Öffnungen des Brennerhalters 10 eingreifen, steht der Flachbrenner 2 mit den beiden Brennerhaltern 10 an den äusseren Enden in Verbindung.The flat burners 2 located within the cladding tubes 4 are now held via a disk-shaped burner holder 10, which is arranged at the two ends of the cladding tube 4. The flat burner 2 is connected to the two burner holders 10 at the outer ends via the electrodes 22 which engage in corresponding openings in the burner holder 10.

Wie die zeichnerische Darstellung in den Fig. 1 und 2 verdeutlicht, sind die Brennerhalter 10 - und damit natürlich auch der mit ihnen in Verbindung stehende Flachbrenner 2 - in einer durch den Pfeil 12 angedeuteten Richtung sowohl nach links als auch nach rechts verschiebbar. Dabei ist die Verschieberichtung vorzugsweise quer zu der Richtung gewählt, in der sich der Flachbrenner 2 mit seinem länglichen Querschnitt erstreckt.As the graphic representation in FIGS. 1 and 2 illustrates, the burner holders 10 - and, of course, also those connected to them standing flat burner 2 - in a direction indicated by the arrow 12 can be moved both to the left and to the right. The direction of displacement is preferably selected transversely to the direction in which the flat burner 2 extends with its elongated cross section.

Die Brennerhalter 10 sind mit jeweils zwei Langlöchern 14 versehen, die sich in Richtung des Pfeiles 12 erstrecken. In jedes Langloch 14 greift ein Stift 16 ein, wodurch während des Verschiebens der Brennerhalter 10 eine eindeutige Führung erreicht wird. Ausserdem werden durch die gegenüber den Brennerhaltern 10 ortsfest angeordneten Stifte 16 zwei unterschiedliche Endpositionen der Brennerhalter 10 markiert, wenn sich nämlich die Stifte 16 an dem einen oder an dem anderen Ende des Langloches befinden. Durch nicht dargestellte Schrauben lassen sich die Brennerhalter 10 in den beiden Endpositionen fixieren, so dass auch der Flachbrenner in den beiden unterschiedlichen Positionen fest gehalten ist.The burner holders 10 are each provided with two elongated holes 14 which extend in the direction of the arrow 12. A pin 16 engages in each elongated hole 14, as a result of which clear guidance is achieved during the displacement of the burner holder 10. In addition, two different end positions of the burner holder 10 are marked by the pins 16 arranged in a fixed position relative to the burner holders 10, namely when the pins 16 are located at one or the other end of the elongated hole. The burner holder 10 can be fixed in the two end positions by screws, not shown, so that the flat burner is also firmly held in the two different positions.

In der Darstellung gemäss Fig. 1 befinden sich die Brennerhalter 10 in einer ersten festen Position, der eine mittige Anordnung des Flachbrenners 2 innerhalb des Rohres 4 zugeordnet ist. In dieser bisher allein üblichen Lage des Flachbrenners 2 lässt sich ohne weiteres auch ein Transport durchführen, da der Flachbrenner 2 nicht in Berührung mit dem Hüllrohr 4 steht.1, the burner holder 10 is in a first fixed position, which is assigned a central arrangement of the flat burner 2 within the tube 4. In this previously customary position of the flat burner 2, transport can also be carried out without any problems, since the flat burner 2 is not in contact with the cladding tube 4.

Durch Verschieben der Brennerhalter 10 in Richtung des Pfeiles 12 wird die in Fig. 2 dargestellte Position erreicht. Da sich der Flachbrenner 2 zusammen mit den Brennerhaltern 10 bewegt, während das Hüllrohr 4 und die Stifte 16 ihre Lage beibehalten, kommt der Flachbrenner 2 an den Berührungsstellen 6 und 8 in Kontakt mit der Innenwand des Hüllrohres 4. Im Idealfall erstrecken sich diese beiden Kontakte linienförmig längs der gesamten Länge des Flachbrenners 2.By moving the burner holder 10 in the direction of arrow 12, the position shown in FIG. 2 is reached. Since the flat burner 2 moves together with the burner holders 10 while the cladding tube 4 and the pins 16 remain in position, the flat burner 2 comes into contact with the inner wall of the cladding tube 4 at the contact points 6 and 8. Ideally, these two contacts extend linear along the entire length of the flat burner 2.

Die Länge der Langlöcher 14 wird unter Berücksichtigung des Durchmessers der Stifte 16 also so gewählt, dass - ausgehend von der Position in Fig. 1 - bei einem Verschieben der Brennerhalter 10 in Richtung des Pfeiles 12 der Flachbrenner 2 in Kontakt mit dem Hüllrohr 4 kommt, ohne dass dabei Beschädigungen auftreten.The length of the elongated holes 14 is thus chosen taking into account the diameter of the pins 16 such that - starting from the position in FIG. 1 - when the burner holder 10 is moved in the direction of the arrow 12, the flat burner 2 comes into contact with the cladding tube 4, without causing any damage.

Bei dem in Fig. 4 gezeigten Ausführungsbeispiel (hier ist das Hüllrohr nicht dargestellt) ist der Flachbrenner 2 mit im Abstand voneinander angeordneten Manschetten 42 umgeben. Auch hier lässt sich der Flachbrenner 2 mittels der Brennerhalter 10 so weit verschieben, dass die Manschetten 42 an der Innenwand des Hüllrohres 4 anliegen, womit dann gleichfalls die gewünschte Kontaktkühlung eintritt.In the exemplary embodiment shown in FIG. 4 (the cladding tube is not shown here), the flat burner 2 is surrounded by sleeves 42 arranged at a distance from one another. Here, too, the flat burner 2 can be displaced by means of the burner holder 10 to such an extent that the sleeves 42 bear against the inner wall of the cladding tube 4, which then also results in the desired contact cooling.

In den Fig. 1 und 2 wird vorausgesetzt, dass die Brennerhalter 10 jeweils von Hand verschoben werden. Es ist selbstverständlich auch möglich, sich hierzu mechanischer Hilfsmittel zu bedienen. Besonders vorteilhaft ist die Verwendung eines Bimetalls, welches bekanntlich die Eigenschaft einer mechanischen Verformung bei Überschreiten einer bestimmten Temperatur besitzt. Wenn man ein solches Bimetall dazu ausnutzt, um die Brennerhalter 10 bzw. den Flachbrenner 2 bis zur Berührung mit dem Hüllrohr 4 zu verschieben, ergibt sich der Vorteil, dass die Kontaktkühlung nicht sofort bei Inbetriebnahme der Niederdruckdampflampe 1 einsetzt. Die Niederdruckdampflampe 1 kann dann ohne Kühlung sehr schnell ihre optimale Arbeitstemperatur erreichen, und erst danach wird mit Hilfe eines Bimetalls die Kontaktkühlung hergestellt.1 and 2 it is assumed that the burner holder 10 are each moved by hand. Of course, it is also possible to use mechanical aids for this. The use of a bimetal which is known to have the property of mechanical deformation when a certain temperature is exceeded is particularly advantageous. If one uses such a bimetal to move the burner holder 10 or the flat burner 2 until it comes into contact with the cladding tube 4, there is the advantage that the contact cooling does not start immediately when the low-pressure steam lamp 1 is started up. The low-pressure steam lamp 1 can then very quickly reach its optimum working temperature without cooling, and only then is contact cooling produced using a bimetal.

Claims (9)

1. Low-pressure vapour lamp, especially mercury low-pressure vapour lamp, comprising a lamp tube formed as a flat burner (2), which is surrounded by a casing tube, characterized in that the flat burner (2) is at least partly in contact (6, 8) with the inside wall of the casing tube (4).
2. Low-pressure vapour lamp according to Claim 1, characterized in that the contact (6, 8) is formed linearly in the direction of the longitudinal axes of the flat burner (2) and of the casing tube (4).
3. Low-pressure vapour lamp according to Claims 1 and/or 2, characterized in that the flat burner (2) is in contact (6, 8) with the inside wall of the casing tube (4) along two lines oriented in the direction of the longitudinal axes of the flat burner (2) and of the casing tube (4).
4. Low-pressure vapour lamp according to Claim 1, characterized in that the flat burner (2) is in contact with the inside wall of the casing tube (4) by sleeves (42) of thermally conducting material, spaced apart from one another and oriented transversely to the longitudinal axis around the outside wall of the flat burner.
5. Low-pressure vapour lamp according to one of the preceding claims, characterized in that the flat burner (2) is disposed inside the casing tube (4), displaceably (12) transversely to its longitudinal axis.
6. Low-pressure vapour lamp according to Claim 5, characterized in that the flat burner (2) can be fixed in different positions.
7. Low-pressure vapour lamp according to one of the preceding Claims 5 to 6, characterized in that the flat burner (2) is held, at its two ends, by a burner holder (10) formed as a disc, and that the burner holder (10) is displaceable in a direction transversely to the longitudinal axis of the casing tube (4).
8. Low-pressure vapour lamp according to Claim 7, characterized in that the burner holder (10) is equipped, at two opposite ends, with an elongated hole (14), into which two stationary pins (16) engage, which define two different limiting positions of the displaceable burner holder (10).
9. Low-pressure vapour lamp according to one of the preceding claims, characterized in that a bimetallic element is provided, which, when a predetermined temperature value is reached, causes a displacement of the flat burner into a position in which the flat burner is in contact with the casing tube.
EP82730134A 1981-11-12 1982-11-10 Low-vapour pressure lamp Expired EP0079849B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82730134T ATE26769T1 (en) 1981-11-12 1982-11-10 LOW PRESSURE LAMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813144925 DE3144925A1 (en) 1981-11-12 1981-11-12 LOW-PRESSURE STEAM LAMP
DE3144925 1981-11-12

Publications (3)

Publication Number Publication Date
EP0079849A2 EP0079849A2 (en) 1983-05-25
EP0079849A3 EP0079849A3 (en) 1984-04-25
EP0079849B1 true EP0079849B1 (en) 1987-04-22

Family

ID=6146215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730134A Expired EP0079849B1 (en) 1981-11-12 1982-11-10 Low-vapour pressure lamp

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Country Link
EP (1) EP0079849B1 (en)
AT (1) ATE26769T1 (en)
CA (1) CA1205508A (en)
DE (2) DE3144925A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071799A (en) * 1977-04-01 1978-01-31 Xerox Corporation Sodium vapor lamp with emission aperture
DE2825018C2 (en) * 1978-06-05 1986-07-24 Georg 4902 Bad Salzuflen Horstmann Mercury vapor low pressure lamp
JPS5853150A (en) * 1981-09-25 1983-03-29 Toshiba Electric Equip Corp Ultraviolet-ray radiating device

Also Published As

Publication number Publication date
CA1205508A (en) 1986-06-03
DE3144925A1 (en) 1983-06-16
EP0079849A3 (en) 1984-04-25
EP0079849A2 (en) 1983-05-25
ATE26769T1 (en) 1987-05-15
DE3276144D1 (en) 1987-05-27

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