CN105810551A - Mercury-free high voltage gas discharge lamp - Google Patents
Mercury-free high voltage gas discharge lamp Download PDFInfo
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- CN105810551A CN105810551A CN201410856190.7A CN201410856190A CN105810551A CN 105810551 A CN105810551 A CN 105810551A CN 201410856190 A CN201410856190 A CN 201410856190A CN 105810551 A CN105810551 A CN 105810551A
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- gallium
- thallium
- voltage gas
- hydrargyrum
- metal halide
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Abstract
The invention discloses a mercury-free high voltage gas discharge lamp. The lamp comprises a discharge cavity and a tungsten electrode which extends into the discharge cavity to discharge. The tungsten electrode is sequentially connected with a conducting and sealing molybdenum sheet and an outer lead molybdenum wire. The discharge cavity is filled with a filler which comprises inert gas and metal halide. The filler does not contain mercury. The metal halide contains any combination element of four combinations of alone gallium, gallium indium, gallium thallium or gallium indium thallium, wherein the combination element is no more than 10% of the total weight. According to the mercury-free high voltage gas discharge lamp provided by the invention, the filling gas does not contain mercury; the metal halide is added with any one of the halide of gallium, gallium indium or thallium or three mixtures, and is used to replace mercury in the existing mercury-containing high voltage gas discharge lamp or zinc iodide in mercury-free high voltage gas discharge lamp; the start-up time of the lamp is effectively improved; electric shock on the solidity of an electrode welding point is decreased; and the service life of the lamp is improved.
Description
Technical field
The present invention relates to high-voltage gas discharging light, in particular to without hydrargyrum high-voltage gas discharging light.
Background technology
High-voltage gas discharging light includes the discharge vessel with the sealing in internal discharge space, and the discharge vessel of this sealing can be by, for instance quartz glass is made, and two electrodes reach in discharge space, are arranged in a certain distance apart from one another, thus the electric arc that ignites between which.Discharge space has implant, and this implant includes other compositions of noble gas and such as metal halide etc.
Present stage hyperbar gas-discharge lamp, the implant being mainly buffer gas with hydrargyrum, with the raising day by day of environmental requirement, some big Illumination Enterprises of the world are just gradually with more environmentally-friendly item in place such as amalgam, to realize the improvement of living environment.
As Philip uses zinc iodide as the succedaneum of hydrargyrum, it is used for preparing hyperbar gas-discharge lamp.Although the new gas discharge lamp not containing hydrargyrum is absent from environmental pollution and ultraviolet radiation, but its inferior position is obvious too.
One, lamp is longer from starting to the stable time.Reason is not contain the hydrargyrum of liquid in lamp, therefore lamp is puncturing noble gas, discharging chamber starts to warm up in process, the zinc element of replacement for mercury needs to higher temperature just to start volatilization and participates in electric discharge, and produce to maintain the potential difference of electric discharge, during this, fluorescent tube needs to maintain the starting state of a high electric current, until zinc starts volatilization and participates in electric discharge.
Its two, start the starting stage high electric current, greatly reduce the life-span of gas-discharge lamp.Owing to gas-discharge lamp uses tungsten material as electric discharge carrier, transition material uses molybdenum, weld so electrode is tungsten material with the Mo of molybdenum sheet, therefore can there is a contact resistance at pad, namely there is certain resistance in the welding position of bi-material, if the electric current passed through is more big, time is more long, the heating of pad is also more high, metal heated expansion, drive the glass swelling of peripheral press seal, due to the coefficient of expansion between several parts variant (glass and metal, metal is different from the coefficient of expansion of metal), and glass strain and metal solder Stress Release, the switching surge that meeting is regular, cause product failure.It is to say, at the pad of tungsten welding, longer owing to starting the time, so existing excessive at pad and crossing long current impulse, butt welding contact is formed thermal expansion and impacts, reduce reliability and the life-span of product.
Summary of the invention
It is an object of the invention to provide a kind of without hydrargyrum high-voltage gas discharging light, start to the problems such as longer, life-span attenuating of stable time with what solve that existing zinc replacement for mercury occurs.
Embodiments provide a kind of without hydrargyrum high-voltage gas discharging light, including: discharging chamber and the tungsten electrode extending to discharging chamber internal discharge effect, this tungsten electrode is connected with molybdenum sheet and the outer lead molybdenum filament of conduction and sealing function in turn, described discharging chamber is filled with the implant including rare gas and metal halide, described implant is not mercurous, containing the metal halide of any combination element in combining less than the independent gallium of gross weight 10%, gallium indium, gallium thallium or gallium indium thallium four kinds in wherein said metal halide.
In certain embodiments, it is preferred to, when adding the mixture of halides of gallium and indium in described metal halide, the halogenide of described gallium and the halide weight of indium ratio is for 1:1～1:4.
In certain embodiments, it is preferred to, when adding the mixture of halides of gallium and thallium in described metal halide, the halogenide of described gallium and the halide weight of thallium ratio is for 1:1～1:4.
In certain embodiments, it is preferred to, when described metal halide adds the mixture of gallium, indium, three kinds of halogenide of thallium；The weight ratio of the halogenide of described gallium and indium, thallium halogenide summation is 1:1～1:4.
In certain embodiments, it is preferred to, described metal halide also includes sodium iodide and scandium iodide, and its part by weight is 4:1～1:1.
In certain embodiments, it is preferred to, described discharging chamber is spheroid shape, and it is highly 2～4mm, and length is 6～8mm.
In certain embodiments, it is preferred to, the discharging chamber of described 35w, the described height in spheroid shape is 2.8～3.2mm, and length is 7.3～7.7mm.
The present invention uses the interpolation single gallium of trace element, or any one or the three kinds of element matched combined in gallium and indium or thallium add in existing mercury-free gas discharge lamp, owing to it has relatively eutectic boiling point, therefore early stage is started at fluorescent tube, when cavity temperature starts to raise, volatilize in very short time and participate in electric discharge, promoting the metallic vapour pressure in cavity, and fast lifting electric potential difference, reduce and start the high-power output of early stage.Shortening owing to lamp starts the time, therefore its high power, big electric current, the working time of low-voltage significantly shortens, and therefore to protection fluorescent tube overpower work, the reliability promoting pad is most important.
Provided by the invention a kind of without hydrargyrum high-voltage gas discharging light, compared with prior art, fill gas not mercurous, metal halide is added with in the halogenide of gallium or gallium and indium or thallium any one or three kinds of mixture, add or without the interpolation of zinc iodide in hydrargyrum high-voltage gas discharging light for replacing the hydrargyrum in existing mercurous hyperbar gas-discharge lamp, it is effectively improved the startup time of lamp, the surge of the pad firmness of electrode can be lowered, also improve the life-span of lamp simultaneously.
Accompanying drawing explanation
Fig. 1 is the present invention part-structure schematic diagram without hydrargyrum high-voltage gas discharging light.
Fig. 2 is the present invention structural representation without hydrargyrum high-voltage gas discharging light discharging chamber.
Detailed description of the invention
The internal structure of high-voltage gas discharging light, as it is shown in figure 1, discharging chamber 1 and the tungsten electrode 2 extending to discharging chamber internal discharge effect, the molybdenum sheet 3 of transition seal and electric action, and outer lead molybdenum filament 4 three part composition.The tungsten electrode of discharge process by extending to discharging chamber inside, wherein welding between two: tungsten electrode welds with molybdenum sheet overlying contact formula, and molybdenum sheet welds with molybdenum filament overlying contact formula.How firm owing to tungsten electrode and molybdenum sheet are two kinds of metal materials, therefore no matter welding, the stress that its welding position still suffers from contact resistance and the coefficient of expansion due to two kinds of different metals causes exists.And hyperbar gas-discharge lamp, especially automobile-used gas-discharge lamp, start time require that high light exports, therefore ballast can be higher at the initial power flowing to lamp, as rated power be the xenon lamp of 35W, initial power during startup can at about 100W.When therefore starting, electric current also can be relatively larger, initial start stage is the filling gas discharge in discharging chamber, it is gradually increasing in process in fluorescent tube discharging chamber temperature, the gallium of present invention interpolation or one or both mixed halides of gallium and indium or thallium, due to relatively low molten boiling point, can quickly volatilize and participate in electric discharge, three kinds of metals are after participating in electric discharge, electric potential difference meeting rapid increase between two electric discharge tungsten electrodes, now more polyelectron participates in internal excitation, therefore lamp hole temperature meeting fast lifting, and promote the halogenide of sodium and the halogenide volatilization electric discharge of scandium, lamp also tends towards stability gradually.It is to say, the transition elements that the present invention adds, there is relatively low volatilization point, it is possible to start early stage at lamp and quickly volatilize and form higher steam pressure and potential difference, make gas-discharge lamp be transitioned into stable discharging within the shortest time.
Relatively crucially: lamp tube starting process is a process being transitioned into the discharge body stablizing about 1000 degree by room temperature.Therefore the material added in process more fast-forward into electric discharge, stable also more fast of lamp.In prior art, the molten boiling point of the zinc iodide of interpolation is fusing point about 446 DEG C respectively.Boiling point about 625 DEG C.Gallium iodide fusing point: 214 DEG C, boiling point: 345 DEG C, therefore in lighting process, the halogenide that the present invention adds can faster participate in the start-up course of lamp, and lamp more tends towards stability soon, and the power of ballast can be got over and early be reduced to rated power.
Even if it should be noted that lamp is under the driving of 100W, it is also possible to work, but to shorten the life-span for cost, the tube wall load overload operation of lamp.Under high-power, the electric current flowing through lead-in wire is relatively larger equally, and the tube wall load of discharging chamber, air pressure inside all exceedes steady operation.Therefore say that the startup time of lamp is more short, the firmness promoting pad is more good, also can improve the life-span of lamp simultaneously.
The present invention adopts interpolation gallium or the mixture containing gallium with gallium, indium to replace hydrargyrum and zinc iodide, does product initial start stage and promotes the implant of air pressure, the startup time of lamp can be made to be greatly shortened.Find according further to reality test, the three kinds of elements added can add by halide mode, concrete combination can adopt simple gallium, or gallium and indium mixture, gallium and thallium mixture, gallium, indium and thallium mixture, but gross weight ratio is less than the 10% of total metal halide weight.Due to gallium spectral line by by force to weak be 417,403,294,287, indium spectral line by by force to weak be 451,410,326,304,231, send the blue spectral line of mixing.Thallium spectral line by by force to weak be 352,535,378,277, send the green spectral line of mixing.Therefore in practice process, it is necessary to appropriateness adds the mixture of indium, thallium halogenide simple substance and two kinds, it is prevented that colour temperature superelevation and do not meet standard.
Followed by some detailed description of the invention, further describe the present invention.
Fig. 2 illustrates without a kind of preferred structural representation of hydrargyrum high-voltage gas discharging light discharging chamber, and wherein, discharging chamber 1 is in spheroid shape, and its height H is preferably 2～4mm, and the length L counted from sealing-in position 5 is preferably 6～8mm.High-voltage gas discharging light illuminates by lighting the arc discharge between electrode 2.It is filled with metal halide and rare gas in discharging chamber, but does not include hydrargyrum.
Embodiment 1
For 35w without hydrargyrum high-voltage gas discharging light, the inside dimension decision design of discharging chamber is as follows: in spheroid shape height 2.8～3.2mm, length 7.3～7.7mm, and rare gas is xenon or argon, and addition is 6～8 atmospheric pressure；Interpolation gallium iodide is 0.04mg, and other metal halides participating in electric discharge are sodium iodide and scandium iodide, and adding metal halide weight total in discharging chamber to is 0.4mg, and wherein, the part by weight that sodium iodide and scandium iodide add is 4:1～1:1.By high-voltage gas discharging light without hydrargyrum prepared by the present embodiment, the electric potential difference produced between sparking electrode can reach 37V～42V.
Embodiment 2
The present embodiment is to finely tune in embodiment 1, add gallium iodide and indium iodide 0.04mg, replace the gallium iodide added, wherein gallium, indium iodide adding proportion range for 1:1～1:4, other component is constant, high-voltage gas discharging light without hydrargyrum prepared by the present embodiment, the electric potential difference produced between sparking electrode can reach 40V～45V.
Embodiment 3
The present embodiment is to finely tune in embodiment 1, add gallium iodide and thallium iodide indium 0.04mg, replace the gallium iodide added, wherein gallium, thallium iodide adding proportion range for 1:1～1:4, other component is constant, high-voltage gas discharging light without hydrargyrum prepared by the present embodiment, the electric potential difference produced between sparking electrode can reach 42V～45V.
Embodiment 4
The present embodiment is to finely tune in embodiment 1, add gallium iodide, indium iodide and thallium iodide 0.04mg, replace the gallium iodide added, the adding proportion that wherein gallium iodide and indium iodide, thallium iodide are total ranges for 1:1～1:4, other component is constant, high-voltage gas discharging light without hydrargyrum prepared by the present embodiment, the electric potential difference produced between sparking electrode can reach 45V～55V.
It should be noted that indium iodide, thallium iodide mixture ratio need to require to formulate according to actual colour temperature in the above embodiment of the present invention.As done low colour temperature, then indium ratio is many, does high color temperature, and thallium ratio is high.It is inconspicuous to the contribution difference of electric potential difference.
Comparative example 1
For 35w without hydrargyrum high-voltage gas discharging light, the inside dimension design of discharging chamber is as follows: in spheroid shape height 2.8～3.2mm, length 7.3～7.7mm, rare gas is xenon or argon, and addition is 6～8 atmospheric pressure；Interpolation zinc iodide is 0.05mg, other metal halide weight additions participating in electric discharge are 0.2～0.4mg, it is mainly sodium iodide and scandium iodide, its sodium iodide and scandium iodide part by weight are 4:1～1:1, high-voltage gas discharging light without hydrargyrum prepared by this comparative example, the electric potential difference produced between sparking electrode can reach 33V～51V.
Owing to the electric potential difference of standard-required is 42, tolerance is positive and negative 9V, but the fluorescent tube that be added with gallium iodide, indium iodide, thallium iodide three kind materials is found through experiments, equally possible produce sufficiently high electric potential difference not against hydrargyrum, particularly during three kinds of mixing, the electric potential difference of its generation is higher, up to 45～55V.In actual fabrication process, the voltage of lamp is more high, and in the constant situation of power, the electric current of ballast is more low, and to protection circuit, life-saving is beneficial to.
Voltage swing according to bulb side is below rated voltage, and the voltage more low life-span is more short, if lower than rated voltage, understands reduction of service life, and more low, the life-span is more short.Because voltage is more low, in the constant situation of power, the electric current flowing through ballast circuit is more big, generates heat the electronic device of ballast with regard to improving, under thus like environment, can reduce life-span when product uses for a long time.
The gas discharge modulating voltage of hyperbar without hydrargyrum prepared by the present invention is slightly higher than rated voltage, and global voltage tends to reach the standard grade, and substantially prolongs service life.
The above, be only presently preferred embodiments of the present invention, is not the restriction that the present invention does other form, and any those skilled in the art are changed or be modified as the Equivalent embodiments of equivalent variations possibly also with the technology contents of the disclosure above.But every without departing from technical solution of the present invention content, according to any simple modification, equivalent variations and remodeling that above example is made by the technical spirit of the present invention, still fall within the protection domain of technical solution of the present invention.
Claims (7)
1. one kind without hydrargyrum high-voltage gas discharging light, it is characterized in that, comprising: discharging chamber and the tungsten electrode extending to discharging chamber internal discharge effect, this tungsten electrode is connected with molybdenum sheet and the outer lead molybdenum filament of conduction and sealing function in turn, described discharging chamber is filled with the implant including noble gas and metal halide, described implant is not mercurous, containing the metal halide of any combination element in combining less than the independent gallium of gross weight 10%, gallium indium, gallium thallium or gallium indium thallium four kinds in wherein said metal halide.
2. as claimed in claim 1 without hydrargyrum high-voltage gas discharging light, it is characterised in that in described metal halide during the mixture of halides of interpolation gallium and indium, the halogenide of described gallium and the halide weight of indium ratio is for 1:1～1:4.
3. as claimed in claim 1 without hydrargyrum high-voltage gas discharging light, it is characterised in that in described metal halide during the mixture of halides of interpolation gallium and thallium, the halogenide of described gallium and the halide weight of thallium ratio is for 1:1～1:4.
4. it is as claimed in claim 1 without hydrargyrum high-voltage gas discharging light, it is characterised in that when described metal halide adds the mixture of gallium, indium, three kinds of halogenide of thallium；The weight ratio of the halogenide of described gallium and indium, thallium halogenide summation is 1:1～1:4.
5. as claimed in claim 1 without hydrargyrum high-voltage gas discharging light, it is characterised in that described metal halide also includes sodium iodide and scandium iodide, and its part by weight is 4:1～1:1.
6. as claimed in claim 1 without hydrargyrum high-voltage gas discharging light, it is characterised in that described discharging chamber is spheroid shape, and it is highly 2～4mm, and length is 6～8mm.
7. as claimed in claim 6 without hydrargyrum high-voltage gas discharging light, it is characterised in that the discharging chamber of described 35w, the described height in spheroid shape is 2.8～3.2mm, and length is 7.3～7.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856190.7A CN105810551A (en) | 2014-12-31 | 2014-12-31 | Mercury-free high voltage gas discharge lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856190.7A CN105810551A (en) | 2014-12-31 | 2014-12-31 | Mercury-free high voltage gas discharge lamp |
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| CN105810551A true CN105810551A (en) | 2016-07-27 |
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| CN201410856190.7A Pending CN105810551A (en) | 2014-12-31 | 2014-12-31 | Mercury-free high voltage gas discharge lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658206A (en) * | 2017-08-15 | 2018-02-02 | 云南靖创液态金属热控技术研发有限公司 | Liquid metal lamp and its application method |
| TWI728234B (en) * | 2017-04-26 | 2021-05-21 | 日商東芝照明技術股份有限公司 | Discharge lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020047525A1 (en) * | 2000-09-08 | 2002-04-25 | Scholl Robert Peter | Low-pressure gas discharge lamp with a mercury-free gas filling |
| US20070120458A1 (en) * | 2005-11-30 | 2007-05-31 | Mohamed Rahmane | Mercury-free metal halide discharge lamp |
| CN101211743A (en) * | 2006-12-26 | 2008-07-02 | 上海大华照明工程有限公司 | Iodine gallium lamp |
| CN201608150U (en) * | 2005-04-01 | 2010-10-13 | 电灯专利信托有限公司 | Metal halide lamp |
| CN102113085A (en) * | 2008-08-06 | 2011-06-29 | 皇家飞利浦电子股份有限公司 | Metal halide lamp |
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2014
- 2014-12-31 CN CN201410856190.7A patent/CN105810551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020047525A1 (en) * | 2000-09-08 | 2002-04-25 | Scholl Robert Peter | Low-pressure gas discharge lamp with a mercury-free gas filling |
| CN201608150U (en) * | 2005-04-01 | 2010-10-13 | 电灯专利信托有限公司 | Metal halide lamp |
| US20070120458A1 (en) * | 2005-11-30 | 2007-05-31 | Mohamed Rahmane | Mercury-free metal halide discharge lamp |
| CN101211743A (en) * | 2006-12-26 | 2008-07-02 | 上海大华照明工程有限公司 | Iodine gallium lamp |
| CN102113085A (en) * | 2008-08-06 | 2011-06-29 | 皇家飞利浦电子股份有限公司 | Metal halide lamp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI728234B (en) * | 2017-04-26 | 2021-05-21 | 日商東芝照明技術股份有限公司 | Discharge lamp |
| CN107658206A (en) * | 2017-08-15 | 2018-02-02 | 云南靖创液态金属热控技术研发有限公司 | Liquid metal lamp and its application method |
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