CN101587816B - A metal halide lamp - Google Patents
A metal halide lamp Download PDFInfo
- Publication number
- CN101587816B CN101587816B CN200910203563.XA CN200910203563A CN101587816B CN 101587816 B CN101587816 B CN 101587816B CN 200910203563 A CN200910203563 A CN 200910203563A CN 101587816 B CN101587816 B CN 101587816B
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- tube
- lamp
- water cooling
- metal
- metal halide
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- Discharge Lamps And Accessories Thereof (AREA)
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The present invention discloses a pair of discharge electrodes (121, 122) that are set facing each other in an airtight tube (11) in axial direction, wherein the airtight tube (11) is made of silex glass that has UV transmission characteristics and air tightness, and is provided with a discharge space (10). In order to remain arc discharge status in the discharge space (10), appropriate quantity of halogen and metal for emitting ultraviolet light and sufficient quantity of noble gas and quick silver are sealed together. When lamp input power in per unit length of the airtight tube (11) is 50 to 120 W/cm, electric potential gradient D (V/cm) of the lamp under steady illumination is determined between 5.0 to 15.0. Therefore, combining changes like time, metal halogenate lamp suitable for water cooling can be realized by preventing bending of the airtight tube.
Description
Technical field
The present invention relates to the metal halide lamp of a kind of light reaction for the solidifying of ultraviolet curing coating material, functional high-polymer film etc., and relate more specifically to a kind of metal halide lamp, this metal halide lamp can also be controlled and is sealed to the amount of mercury in lamp and make the reduction of ultraviolet radiation intensity, extinguishing or glimmering of the bending of GT tube, lamp minimizes by the variation of binding time etc., works together with water cooling system.
Background technology
The metal halide lamp irradiating for ultraviolet ray being disclosed by JP-A 03-250549 (JP) (list of references 1) comprises thallium or the thallium halide of enclosing GT tube with iron together with mercury, to when reduction has the ultraviolet ray transmitting of 340nm or following shorter wavelength, produce the high luminous intensity with about 365nm wavelength.
Summary of the invention
For the described lamp of list of references 1, the temperature of luminous tube need to be controlled within 600 to 850 ℃ to guarantee the stable lighting condition of lamp.If temperature becomes higher than 850 ℃, the iron of enclosing is penetrated in GT tube to cause melanism, thereby causes the reduction of ultraviolet radiation intensity or the bending of lamp.Therefore, by water-cooled indirect cooling method, can be used to reduce the temperature of lamp.In order to improve its cooling effectiveness, must between lamp and cooling end, keep the interval of about several millimeters.
Along with the increase of middle system size these years, there is the demand for the elongation of lamp.In water cooling system, only provide the interval of about several millimeters, the lamp of elongation is because the temperature that rises and being relatively easily bent in lamp, and lamp and water cooling portion may contact with each other.This contact between lamp and water cooling portion has attracted the mercury around of the contact area in lamp, causes lower steam pressure, and result, and modulating voltage will decline.There is the problem that ultraviolet radiation intensity obviously reduces.
An object of the present invention is to provide a kind of metal halide lamp, the amount of mercury that this metal halide lamp can be enclosed in lamp by control is worked together with water cooling system, thereby not only the variation of binding time has prevented the reduction of ultraviolet radiation intensity and the bending of GT tube, and prevented extinguishing or glimmering of lamp.
Accompanying drawing explanation
Fig. 1 is for the basic block diagram of the embodiment of the present invention is described.
Fig. 2 is the structure chart that shows the part enlarged drawing of Fig. 1.
Fig. 3 is for the key diagram of the relation between electric potential gradient (V/cm) and amount of mercury (mg/cc) is described.
Fig. 4 is for the key diagram of effect of the present invention is described.
Fig. 5 is for the system layout of the example of the ultraviolet lamp that adopts metal halide lamp of the present invention is described.
Fig. 6 is the profile along the line I-I ' acquisition of Fig. 5.
Embodiment
Describe in detail below with reference to the accompanying drawings and realize embodiments of the invention.Fig. 1 has shown for the basic block diagram of the embodiment of metal halide lamp of the present invention is described.
Particularly, by the electrode 121,122 that for example tungsten material is made, be placed two ends in the longitudinal direction in GT tube 11, GT tube 11 is made and is formed therein discharge space 10 by the quartz glass with ultraviolet (uv) transmission characteristic.GT tube 11 is configured to have the mono-layer tube of for example 27.5mm external diameter Φ, 1.5mm thickness m and 2000mm length of illumination L.
Electrode 121,122 is soldered to one end of the metal forming 141,142 of being made by for example molybdenum via lead 131,132.One end of the outer lead not showing is soldered to the other end of metal forming 141,142.Metal forming 141,142 region around by heating from the GT tube 11 of lead 131,132 one end to outer lead of GT tube 11 and sealed.
Metal forming 141,142 can be made by any material, as long as it has similar thermal coefficient of expansion to the quartz glass of configuration GT tube 11.For example, can use molybdenum.The wire 161,162 for powering that is electrically connected to outer lead in the socket 151,152 by for example pottery is made is sealed in state of insulation, and is connected to the power circuit not showing, one end of outer lead is connected to metal forming 141,142.
As the argon gas of the q.s of the rare gas for pilot arc electric discharge, with mercury, as together with at least one and halogen of iron, tin, indium, bismuth, thallium and the manganese of the metal for emitting ultraviolet light, with 1.3kPa, enclosed in GT tube 11.
As described below, suppose that light fixture has the steady illumination condition of 2300V modulating voltage and 10.4A lamp current.If pipe diameter is less than 27.2mm, the distance between electric arc and luminous tube shortens, and result causes melanism, devitrification (devitrification) or the bending of lamp because of the temperature rising in luminous tube.Meanwhile, if pipe diameter is greater than 28.8mm, the distance between water composite cooling pipe and luminous tube diminishes, and result reduces because the modulating voltage compared with low causes brightness.Therefore, the lamp with the pipe diameter within the scope of 27.2 to 28.8mm will be further described.
When the electric potential gradient D amount of mercury that is every cubic centimetre of volume in 4.9V/cm or following and discharge space 10 is 0.39mg, the temperature on the top of GT tube 11 rises to 850 ℃ or higher, the iron of enclosing is penetrated in the GT tube 11 of being made by quartz glass, causes melanism, devitrification or the crooked phenomenon of lamp.
When the electric potential gradient D amount of mercury that is every cubic centimetre of volume in 15.1V/cm or higher and discharge space 10 is 1.21mg, cause flicker or extinguish, therefore can not reach stable lighting condition.
On the other hand, the electric potential gradient D under stabilized illumination state is the amount of mercury M of every cubic centimetre of volume in 11.5V/cm and discharge space 10 while being 0.9mg, can avoid melanism, devitrification and the bending of lamp.
Also find when amount of mercury M that lamp is every cubic centimetre of volume in 15.0V/cm or following and luminous tube at electric potential gradient D be while being lit under 1.2mg or following condition, can avoid the flicker causing because of current value reduction or extinguish.
Fig. 3 has shown the relation between electric potential gradient (V/cm) and amount of mercury (mg/cc).As apparent from Figure 3 be electric potential gradient (V/cm) and the proportional relation of amount of mercury (mg/cc).From experimental result, when pipe diameter 27.2 within the scope of 28.8mm, electric potential gradient D within the scope of 5 to 15V/cm and amount of mercury M 0.4 in the scope of 1.2mg/cc time, can avoid melanism, devitrification and the bending of lamp.
To be explanation be set to 850 ℃ or the variations in temperature on top and the key diagram of comparative example of GT tube 11 of the present invention when following when the temperature of rising to Fig. 4.
Fig. 4 has shown the result obtaining by measuring the variations in temperature of the 100mm distance starting along the electrode 121 from shown in Fig. 2 on the top of GT tube 11.Lamp input power for 120W/cm obtains data when amount of mercury is respectively 0.34mg/cc and 0.90mg/cc.
As apparent from Figure 4 be when amount of mercury is 0.34mg/cc, even away from electrode 100mm position, temperature is also over 850 ℃.When amount of mercury is 0.90mg/cc, on the contrary, even near the electrode that is considered to have maximum temperature, temperature is also approximately 820 ℃.
From result, find out, when pipe diameter be 27.2 to 28.8mm and the lamp input power of the per unit length of GT tube be 50 to arrive 120W/cm, and electric potential gradient and amount of mercury are respectively in 5 to 15V/cm and 0.4 to 1.2mg/cc relation time, and the temperature on the top of GT tube 11 can be adjusted to 850 ℃ or following.As a result, become and can prevent melanism, devitrification and the bending of lamp.
Fig. 5 and Fig. 6 are for illustrating that metal halide lamp of the present invention is used to be provided with the figure of embodiment of the ultraviolet lamp of water-cooled body.Fig. 5 is system layout, and Fig. 6 is the profile along the line I-I ' acquisition of Fig. 5.
Ultraviolet lamp is comprised of metal halide lamp 100 and water cooling unit 200.Metal halide lamp 100 and water cooling unit 200 are positioned with the interval of appointment by means of spacer (spacer) 41a, the 41b that are attached to the socket 151,152 of metal halide lamp 100.
Water cooling unit 200 is made by the transparent material such as quartz glass cylindraceous, and has the double pipe structure that comprises inner tube 21 and be arranged on the outer tube 22 in its outside.Metal halide lamp 100 is positioned in inner tube 21.
Water cooling unit 200 has the cooling fluid 24 such as water circulating from the outside by being arranged on tube connector 23a, the 23b of outer peripheral edges.As shown in Figure 6, the cooling fluid 24 with low temperature is supplied to by tube connector 23a, and the cooling fluid 24 of the heating after cool metal halide lamp 100 is discharged from by tube connector 23b.The cooling fluid 24 of the heating of discharging is cooled and again by tube connector 23a, is supplied to.
The metal oxide film that comprises metal oxide is coated on the outer surface of outer tube 22.Metal oxide is by T
io
2, C
eo
2, Z
no
2, S
no
2and Z
ro
2in at least one formation.
Metal oxide film comprises and is suitable for absorbing the composition that wavelength is shorter than the light of 300nm that has send from metal halide lamp 100.
When metal halide lamp 100 is luminous, covers metal oxide film on the outer surface of outer tube 22 and absorb and there is the light that wavelength is shorter than 300nm.Therefore, effectively the ultraviolet light with 300 to 430nm wave-length coverages of curing resin material is transmitted to such as resin-coated irradiation thing by water cooling unit 200.
For example, suppose that the inner tube 21 of water cooling unit 200 has the diameter of 32mm and the diameter that outer tube 22 has 36mm, metal halide lamp 100 is lit in water cooling unit 200.
When take the amount of mercury M of the every cubic centimetre volume of electric potential gradient D in 5.0V/cm or above and luminous tube during as 0.4mg or above some bright light, the temperature that can reduce the top of the GT tube 11 that the bending because of electric arc causes rises.As a result, can prevent the contact between metal halide lamp 100 and the inner tube 21 of water cooling unit 200, and can avoid melanism and devitrification.The mitigation of the temperature of metal halide lamp 100 is risen and is also contributed to prevent flicker or extinguish.
Claims (2)
1. a metal halide lamp, is characterized in that, comprising:
GT tube, is made by the material with ultraviolet (uv) transmission characteristic, and is equipped with and has bubble-tight discharge space;
Pair of discharge electrodes is mutually faced in the axial direction configuration in described discharge space;
Enclose material, comprise halogen and the metal of emitting ultraviolet light, described inclosure material is enclosed in described discharge space together with mercury with rare gas; And
Water cooling unit, this water cooling unit consists of inner tube and the outer tube that is arranged on described inner tube outside, described water cooling unit is set to comprise that in described inner tube described GT tube is to carry out cooling to this GT tube, the outer surface of the described outer tube of this water cooling unit has the metal oxide film that comprises metal oxide
Wherein, described GT tube has the pipe diameter of 28.0 ± 0.8mm, the lamp input power of the per unit length of described GT tube is 50 to 120W/cm, the electric potential gradient D of lamp under steady illumination state is determined to be in 5.0 within the scope of 15.0V/cm, and in the described inclosure material in described GT tube, the amount of mercury M of every cubic centimetre of volume is determined to be in 0.4 within the scope of 1.2mg/cc.
2. metal halide lamp as claimed in claim 1, is characterized in that, for radiating the metal of described ultraviolet light, is at least one of chosen from Fe, tin, indium, bismuth, thallium and manganese.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-132858 | 2008-05-21 | ||
| JP2008132858A JP5217021B2 (en) | 2008-05-21 | 2008-05-21 | Metal halide lamp |
| JP2008132858 | 2008-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101587816A CN101587816A (en) | 2009-11-25 |
| CN101587816B true CN101587816B (en) | 2014-09-03 |
Family
ID=41371988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910203563.XA Active CN101587816B (en) | 2008-05-21 | 2009-05-19 | A metal halide lamp |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5217021B2 (en) |
| CN (1) | CN101587816B (en) |
| TW (1) | TWI459432B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5347875B2 (en) * | 2009-09-29 | 2013-11-20 | ウシオ電機株式会社 | Long arc type discharge lamp |
| JP4978738B1 (en) * | 2011-01-06 | 2012-07-18 | 岩崎電気株式会社 | Metal halide lamp |
| DE102011113130B3 (en) | 2011-09-14 | 2013-01-24 | Heraeus Quarzglas Gmbh & Co. Kg | Solar radiation receiver with a quartz glass entrance window |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4298813A (en) * | 1978-10-23 | 1981-11-03 | General Electric Company | High intensity discharge lamps with uniform color |
| EP0444590A1 (en) * | 1990-02-27 | 1991-09-04 | Ushio Denki Kabushiki Kaisha | Metal vapor discharge lamp |
| US5107178A (en) * | 1990-01-16 | 1992-04-21 | Ushio Denki Kabushiki Kaisha | Metal vapor discharge lamp filled with bismuth, mercury, a rare gas, iron and a halogen |
| US5489819A (en) * | 1993-03-17 | 1996-02-06 | Ushiodenki Kabushiki Kaisha | Method of operating a metallic vapor discharge lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379024B1 (en) * | 1999-11-29 | 2002-04-30 | Hoya-Schott Corporation | Dielectric barrier excimer lamp and ultraviolet light beam irradiating apparatus with the lamp |
| JP2005339819A (en) * | 2004-05-24 | 2005-12-08 | Harison Toshiba Lighting Corp | High-pressure mercury lamp |
-
2008
- 2008-05-21 JP JP2008132858A patent/JP5217021B2/en active Active
-
2009
- 2009-05-18 TW TW098116415A patent/TWI459432B/en active
- 2009-05-19 CN CN200910203563.XA patent/CN101587816B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4298813A (en) * | 1978-10-23 | 1981-11-03 | General Electric Company | High intensity discharge lamps with uniform color |
| US5107178A (en) * | 1990-01-16 | 1992-04-21 | Ushio Denki Kabushiki Kaisha | Metal vapor discharge lamp filled with bismuth, mercury, a rare gas, iron and a halogen |
| EP0444590A1 (en) * | 1990-02-27 | 1991-09-04 | Ushio Denki Kabushiki Kaisha | Metal vapor discharge lamp |
| US5489819A (en) * | 1993-03-17 | 1996-02-06 | Ushiodenki Kabushiki Kaisha | Method of operating a metallic vapor discharge lamp |
Non-Patent Citations (2)
| Title |
|---|
| JP平6-267509A 1994.09.22 |
| JP平8-148121A 1996.06.07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009283227A (en) | 2009-12-03 |
| JP5217021B2 (en) | 2013-06-19 |
| TWI459432B (en) | 2014-11-01 |
| TW201003723A (en) | 2010-01-16 |
| CN101587816A (en) | 2009-11-25 |
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