DE102008021352A1 - Dosing container for receiving a mercury-containing material for a discharge lamp and method for producing such a dosing and discharge lamp with such a dosing and method for producing a discharge lamp - Google Patents

Abstract

The invention relates to a metering container (8, 8 ') for receiving a mercury - containing material (9, 9') for a discharge lamp (I), which is connected to a pump tube (7, 7) connected to a discharge vessel (2) of the discharge lamp (1) ') and / or the discharge vessel (2) is arranged. The invention also relates to a method for producing such a metering container (8, 8 '). In addition, the invention relates to a discharge lamp (I) with such a metering container (8, 8 ') and a method for producing such a discharge lamp (I).

Description

dosing for receiving a mercury-containing material for a Discharge lamp and method for producing such Dosing and discharge lamp with such Dosing container and method for producing a discharge lamp

Technical area

The The invention relates to a dosing container for receiving a mercury-containing material for a discharge lamp and a method of manufacturing such a dosing container. Furthermore, the invention relates to a discharge lamp with a Such dosing and a method for manufacturing a discharge lamp.

Gas discharge lamps have in recent years, especially in the form of compact fluorescent lamps found a widespread application. The technical development Amongst other things, it is geared to an increasing reduction in size the overall size of the lamp. Both are Gas discharge lamps with integrated electronic ballast or for connection to a separate electronic ballast common. Such discharge lamps have a mercury source (Hg source) in the discharge vessel, from which a suitable amount of mercury evaporates during operation and through the corresponding mercury lines (mainly 185 nm and 254 nm) is essential for UV (ultraviolet) production in contributes to the discharge vessel. Since that Element mercury as essential for UV generation Part of the discharge medium paramount importance will, for the sake of simplicity, continue to be followed by a Hg source spoken, although this in the form of a fixed or liquid source. in principle the term Hg source basically comprises two functions, namely on the one hand, a mercury donor. there it is a material or a body in which the mercury is contained, for example, liquid Mercury or an iron pill, an amalgam etc. Furthermore there however, it also often performed independently of this steam-pressure regulating Hg elements, such as work amalgam, Hg precipitation at a so-called cold spot etc.

Around defined conditions for the prevailing in the operation To produce vapor pressure of the mercury, is a vapor pressure regulating Element needed. The temperature of the vapor pressure regulating element, for example, amalgam or cold spot, d. H. Cold spot, bothers the vapor pressure of mercury in the discharge. This is especially true if the vapor pressure regulating element is a cold junction is.

It is also known to attach to the discharge vessel, a thin piece of pipe, which serves as a pump tube. The pump tube serves on the one hand in the manufacture of the gas discharge lamp for evacuation and filling of the discharge vessel and is further usually designed to receive the Hg source therein. Such a discharge lamp is for example off DE 10 2004 018 104 A1 known.

at the known discharge lamps is the dosage of mercury relatively difficult. To meet the requirement for further reduction take into account the amount of mercury in such discharge lamps To be able to, this must be precisely metered. So far, this has only been the case when producing relatively small amounts of mercury very difficult and expensive possible.

Presentation of the invention

It The object of the present invention is a dosing container and a method for producing such a dosing container, and a discharge lamp with such a dosing which allows relatively small quantities of mercury to train very precisely and for to provide the attachment in the discharge lamp.

These Task is by a dosing tank, which features according to claim 1, a method for producing such a dosing container, which has the features of claim 10, and a discharge lamp, which has the features of claim 7 solved.

One Dosing container according to the invention for receiving for a mercury-containing material for a Discharge lamp is in one with a discharge vessel of the Discharge lamp connected pump tube and / or arranged in the discharge vessel. Only the basic design that the mercury-containing Material introduced in such a dosing is, allows a very precise metering of mercury in particular even if only relatively small amounts of mercury are present in it should be. By such a dosing can in addition to the exact specification of the amount of mercury and the operation a discharge lamp with such a small amount and a Precisely tuned amount of mercury functionally reliable operate.

It is particularly preferred if the metering container is designed as a cannula, in particular as a rectilinear tubular cannula. Just by this configuration, the dosage of contained therein mercury extremely accurate.

Preferably the metering container is designed so that the mercury-containing Material is arranged strand-like in the dosing. Both the introduction and the provision of the least amount of mercury This can be done more precisely. The introduction can by this shaping and design are relatively inexpensive.

Preferably the metering container is made of glass, in particular formed from a ferrous glass material. The in the known Embodiments of mercury sources, which they invariably without dosing container in the discharge lamp or a pump tube be attached scatters the amount of mercury produced relatively strong and the underlying this manufacturing process dosing are limited in terms of quantity accuracy, in particular, when relatively small amounts of mercury are to be generated.

Preferably can by the design of the dosing of ferrous Glass material after penetration of the dosing tank allows optimal processing in the discharge lamp become. In particular, with this chosen material for the dosing also opening of which it is enough for the release of mercury, even then, if this already arranged in the manufactured discharge vessel is. Opening the introduced dosing tank can characterized from the outside via the discharge vessel by means of suitable Light radiation, in particular laser radiation, can be achieved, wherein just the iron-containing glass material of the dosing a high absorption of a specific laser radiation, in particular a Laser radiation of a Nd: YAG laser enabled.

Thereby the production can be optimized and in the installed state of the Dosage container in the discharge vessel can a very precise and precisely dimensioned opening be generated in the dosing to the subsequent operation the discharge lamp, the leakage of mercury from the dosing to be able to.

Preferably the dosing container has an inner diameter of smaller 0.13 mm, in particular of 0.1 mm. This is particularly preferred if the metering container is designed as a straight-line cannula is and over its entire length a substantially having constant such inner diameter. This can the introduction and dosing of the mercury in such a cannula can be done very precisely and it can, for example, by an inner diameter of 0.1 mm and a desired Dosage 1 mg one length of cannula with 9.4 mm are measured and generated exactly. This can be a precise dosing For example, in 0.1 mg steps exactly and without problems.

A Discharge lamp according to the invention comprises a discharge vessel and a metering container according to the invention or an advantageous embodiment thereof, wherein the dosing in the discharge vessel and / or in one with the Discharge vessel connected pump tube arranged is. Such a design of a discharge lamp allows the introduction of a relatively small amount of mercury, which can be determined exactly by the metering.

Preferably is the dosing container after gas-tight sealing of the discharge vessel for releasing the mercury During operation of the discharge lamp site-specific fusible. This is in particular by laser radiation, in particular by laser radiation of a Nd: YAG laser.

Of Furthermore, the invention relates to a method for producing a containing mercury-containing material dosing for a discharge lamp in which the material in the Dosage container is introduced and the dosage depends from the specifically producible receiving volume of the dosing is carried out. Preferably, the dosing is as a cannula with a cylindrical receiving volume educated. Particularly advantageously, the cannula is formed in a straight line.

Especially It proves to be preferable if the introduction of the mercury-containing Material with regard to the amount to be introduced by an optical Detector device is monitored. This can be very easy and still very accurately the already introduced amount to be monitored and precise the desired amount to be incorporated be achieved.

One Another aspect of the invention relates to a method for manufacturing a discharge lamp in which a dosing according to the process according to the invention is prepared and in a discharge vessel and / or connected to the discharge vessel Pumprohr is introduced.

Preferably, after the introduction of the metering container into the discharge vessel and / or into the pump tube, the discharge vessel is closed in a gastight manner and the closed metering container is site-specifically sealed in order to remove the mercury from the metering container during operation of the discharge lamp melted.

Preferably the dosing container by a laser radiation, in particular melted by laser radiation from an Nd: YAG laser.

Preferably the mercury-containing material is opened after opening the Dosierbehälters for expelling the mercury from the Dosing container heated during operation of the discharge lamp.

A exact dosage of mercury in the dosing tank can thereby achieved in the manufacture of the dosing be that, for example, a cannula of a particular Length filled with the mercury-containing material and then the desired length is cut off, which in terms of the given inner dimension and then the quantity applied depends on the length measure of Cannula an exact and precise mercury dosage guaranteed. However, it can also be provided that the dosing, which in particular as a cannula is formed, first to a desired Length is cut and this then cut off Part then completely with the mercury-containing material is filled. Again, this may depend on the knowledge the inner diameter and the cut length one exact and desired metering of mercury be enabled.

It can also be provided that with the mercury-containing Material filled dosing tank not complete is closed and in the open state in the discharge vessel and / or is introduced into the pump tube. A subsequent opening of the dosing, for example by a laser radiation then no longer needs to be done. Right then, if in such an embodiment, a relatively small opening cross-section is formed of dosing, is a little or low evaporating surface provided as an opening, so that here virtually a capillary action is generated and an unwanted Exit of the mercury does not take place.

Of the Dosierbehälter can preferably by constrictions fixed in the pump tube and / or in the discharge vessel become.

Brief description of the drawings

One Embodiment of the invention will be described below schematic drawings explained in more detail. It demonstrate:

1 a schematic representation of a discharge lamp according to the invention; and

2 a schematic representation of a metering container according to the invention.

Preferred embodiment the invention

In The figures are the same or functionally identical elements with the provided the same reference numerals.

In the illustration according to 1 is a schematic elevational view of a discharge lamp I shown, which is designed as a compact fluorescent lamp. Both the configuration and the components of the discharge lamp I shown are merely exemplary. The discharge lamp I comprises an enveloping bulb 1 , which is a discharge vessel 2 surrounds. The discharge vessel 2 is helical in the embodiment, in which connection two vessel parts are helically wound and at a connection point 5 connected to each other.

The discharge lamp I further comprises a socket 4 and an associated housing 3 in which an operating device for the discharge lamp I can be arranged.

The discharge vessel 2 extends with its lower free ends 6 and 11 in the case 3 ,

In the area of the free end 6 is another piece of pipe as a pump tube 7 arranged or with the discharge vessel 2 connected.

In the embodiment is in this pump tube 7 a dosing tank 8th for receiving a mercury-containing material, in particular a Hg source 9 arranged. The dosing tank 8th is designed in the embodiment as a rectilinear elongated part in which the Hg source 9 is introduced. The dosing tank 8th is completely in the pump tube in the embodiment 7 arranged and firmly connected, for example, in the range of glass crushes with this. At its the winding area of the discharge vessel 2 facing the end of the dosing 8th an opening 10 from which the mercury escape during operation of the discharge lamp I and into the discharge space of the discharge vessel 2 can occur.

The position of the pump tube 7 and thus also the attachment of the dosing 8th is a possible embodiment. It can also be provided that a pump tube 7 ' in the helical portion of the discharge vessel 2 , is arranged in particular axially to this portion and in the connection area 5 with the discharge vessel 2 connected is. Again, an elongated dosing 8th' in the form of a glass cannula in the pump pipe 7 ' be arranged and a Hg source 9 ' contain.

Preferably, the metering containers 8th and 8th' designed as glass cannulas. Preferably, the material of this dosing 8th and 8th' an iron-containing glass material, in particular a so-called reed glass, for example a Schott glass with the No. 8516.

Again, one of the connection point 5 facing opening 10 ' in the dosing tank 8th' be educated. The openings 10 respectively. 10 ' are in the embodiment after the introduction of the dosing 8th or 8th' into the discharge vessel 2 or the pump tube 7 respectively. 7 ' , generated. In this context, laser radiation of an Nd: YAG laser from outside the discharge vessel 2 or from outside the pump tube 7 respectively. 7 ' a melting of the iron-containing glass material of the dosing 8th respectively. 8th' in the place of the opening 10 respectively. 10 ' performed to just this opening 10 respectively. 10 ' to be able to produce.

Eventually, after opening the dosing tank 8th respectively. 8th' and thus after creating the openings 10 respectively. 10 ' in the pump tube 7 respectively. 7 ' the mercury-containing material in the dosing tank 8th respectively. 8th' warmed in which the pump tube 7 respectively. 7 ' is heated. This allows the mercury in the direction of the discharge vessel 2 or by the discharge vessel 2 be ejected formed therein discharge space.

In 2 is in one embodiment of the dosing 8th shown, which is designed as an elongated and rectilinear cannula. The design of the dosing 8th has a columnar or cylindrical receiving space for the mercury-containing material or the Hg source 9 on. The inner diameter of this receiving volume is characterized by d2, in comparison to the outer diameter d1 of the dosing 8th is drawn. In the exemplary embodiment, it can be seen that the inner diameter d2 is substantially smaller than the outer diameter d1.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102004018104 A1 [0005]

Claims (16)

Dosing container for receiving a mercury-containing material ( 9 . 9 ' ) for a discharge lamp ( 5 ), which in one with a discharge vessel ( 2 ) of the discharge lamp (I) connected pump tube ( 7 . 7 ' ) and / or in the discharge vessel ( 2 ) is arranged. Dosing container according to claim 1, which as cannula ( 8th . 8th' ) is trained. Dosing container according to claim 1 or 2, wherein the mercury-containing material ( 9 . 9 ' ) stranded in the dosing container ( 8th . 8th' ) is arranged. Dosing container according to one of the preceding Claims, which of glass, in particular a ferrous Glass material is formed. Dosing container according to one of the preceding Claims, which an inner diameter (d2) of smaller 0.13 mm, in particular of 0.1 mm. Dosing container according to one of the preceding claims, in which the quantity of mercury-containing material ( 9 . 9 ' ) per unit length of the dosing ( 8th . 8th' ) is given. Discharge lamp with a discharge vessel ( 2 ) and a dosing container ( 8th . 8th' ) according to one of the preceding claims, which in the discharge vessel ( 2 ) and / or in one with the discharge vessel ( 2 ) connected pump tube ( 7 . 7 ' ) is arranged. Discharge lamp according to Claim 7, in which, after the gas-tight closure of the discharge vessel ( 2 ) the dosing container ( 8th . 8th' ) for releasing the mercury in the operation of the discharge lamp (I) is site-specific fusible. Discharge lamp according to Claim 8, in which the melting of the dosing container ( 8th . 8th' ) Can be generated by a laser radiation, in particular by Laserstahlung a Nd: YAG laser. Method for producing a mercury-containing material ( 9 . 9 ' ) containing dosing ( 8th . 8th' ) for a discharge lamp (I) in which the material ( 9 . 9 ' ) into the dosing container ( 8th . 8th' ) is introduced and the dosage depending on the specifically producible receiving volume of the dosing ( 8th . 8th' ) is carried out. Method according to Claim 10, in which the dosing container is used as a cannula ( 8th . 8th' ) is formed with a cylindrical receiving volume. A method according to claim 10 or 11, wherein the introduction of the mercury-containing material ( 9 . 9 ' ) is monitored with respect to the amount to be introduced by an optical detector unit. Method for producing a discharge lamp, in which a metering container (A) produced by a method according to one of Claims 10 to 12 (US Pat. 8th . 8th' ) in a discharge vessel ( 2 ) and / or in a with the discharge vessel ( 2 ) connected pump tube ( 7 . 7 ' ) is introduced. Method according to claim 13, in which after the introduction of the dosing container ( 8th . 8th' ) into the discharge vessel ( 2 ) and / or in the pump tube ( 7 . 7 ' ) the discharge vessel ( 2 ) is closed gas-tight and the closed dosing ( 8th . 8th' ) Site-specific to the leakage of mercury from the dosing ( 8th . 8th' ) is melted during operation of the lamp (I). Process according to claim 14, in which the dosing tank ( 8th . 8th' ) is melted by a laser radiation, in particular by laser radiation from a Nd: YAG laser. A method according to claim 14 or 15, wherein the mercury-containing material ( 9 . 9 ' ) after opening the dosing tank ( 8th . 8th' ) for expelling the mercury from the metering container ( 8th . 8th' ) is heated during operation of the discharge lamp (I).