CN206194694U - Discharge lamp - Google Patents
Discharge lamp Download PDFInfo
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- CN206194694U CN206194694U CN201621056938.6U CN201621056938U CN206194694U CN 206194694 U CN206194694 U CN 206194694U CN 201621056938 U CN201621056938 U CN 201621056938U CN 206194694 U CN206194694 U CN 206194694U
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- tight container
- discharge lamp
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Abstract
The utility model provides a discharge lamp, its devitrification or deformation that can detect out the airtight container is caused by excessive rising of temperature. Embodiment's long arc type discharge lamp radiates the ultraviolet ray, and possess: inside sealed and only have an airtight container of a pair of electrode with the mode card of opposition each other at both ends by air -tight, enclose in the metal haloid material of the inside of airtight container, the fusing point is higher than metal haloid material's fusing point to the fusing point is more than 1450 DEG C and the metallic compound below 1500 DEG C.
Description
Technical field
Implementation method of the present utility model is related to a kind of discharge lamp.
Background technology
For example, disclose one kind being used as in field of liquid crystal panel manufacture or print field to shone thing irradiation ultraviolet radiation
The discharge lamp of the light source to be exposed, solidify, dry etc..
Patent document 1：Japanese Unexamined Patent Publication 2009-259790 publications
When the condition for turning into more than 900 DEG C with outside wall temperature carries out lighting, gas-tight container produces devitrification or change to discharge lamp
The possibility of shape is uprised.Especially, in the inside of the irradiation unit for carrying out lighting after installing discharge lamp, if for example, being arranged at
There is exception or is input under the excessively high abnormal use condition of the electric power of discharge lamp to carry out lighting in the cooling body of irradiation unit,
Then gas-tight container generation devitrification or the possibility of deformation can be uprised.It is therefore preferable that the outside wall temperature of discharge lamp outer surface is at 650 DEG C
~850 DEG C or so of scope.
On the other hand, gas-tight container is also possible to produce devitrification or change in the case of in addition to being raised except excessive temperature
Shape.For example, it is possible to the devitrification of gas-tight container is produced in the enclosure of discharge lamp because enclosing.And, it is possible to because in lighting
Heat that period produces and produce the deformation of gas-tight container.
The content of the invention
Implementation method of the present utility model provides a kind of discharge lamp, and its devitrification for being capable of detecting when gas-tight container or deformation are
Raised by excessive temperature and caused.
The discharge lamp of implementation method of the present utility model radiates ultraviolet, and the Discharging lamps and lanternses are standby：Inside is by airtightly close
Seal and the gas-tight container of a pair of electrodes is engaged in mode opposite each other at two ends；Enclose in the metal of the inside of gas-tight container
Halide；Fusing point is higher than the fusing point of metal halide, and fusing point is the metallic compound of more than 1450 DEG C and less than 1500 DEG C.
According to implementation method of the present utility model, a kind of discharge lamp can be provided, its mistake for being capable of detecting when gas-tight container
Saturating or deformation is raised by excessive temperature and caused.
Brief description of the drawings
Fig. 1 is illustrative for the schematic diagram of the discharge lamp involved by the 1st implementation method.
Fig. 2 is to represent the point that the outside wall temperature according to gas-tight container 10 of the discharge lamp 1 involved by the 1st implementation method is represented
The figure of the relation between lamp time and illumination sustainment rate.
Fig. 3 is the utilization rate (%) and gas-tight container 10 of the cooling wind W for representing the discharge lamp 1 involved by the 1st implementation method
Outside wall temperature Touter, gas-tight container 10 inner wall temperature TinnerBetween relation figure.
Fig. 4 is the utilization rate (%) and gas-tight container 10 of the cooling wind W for representing the discharge lamp 1 involved by the 1st implementation method
Outside wall temperature Touter, relation between metallic compound 18 figure.
In figure：1- discharge lamps, 10- gas-tight containers, 12- discharge spaces, 14- sealings, 16- metal halides, 18- metals
Compound, 20- electrodes, 22- axial woods, 24- coils, 26- paillon foils, 28- outer leads, 30- pedestals, 40- wires, 50- terminals.
Specific embodiment
Discharge lamp 1 involved by embodiments described below is the discharge lamp of the long arc for radiating ultraviolet, its tool
It is standby：Inside is hermetically sealed and the gas-tight container 10 of a pair of electrodes 20,20 is engaged in mode opposite each other at two ends；Envelope
Enter the metal halide 16 of the inside of gas-tight container 10；Fusing point is higher than the fusing point of metal halide 16, and fusing point is 1450
More than DEG C and less than 1500 DEG C of metallic compound 18.
According to present embodiment, devitrification or the deformation of gas-tight container 10 are capable of detecting when.
In addition, in the discharge lamp 1 involved by embodiments described below, metallic compound 18 includes tungsten oxide.
According to present embodiment, metallic compound will not occur chemical reaction in gas-tight container 10 and can stablize and deposit
, it is thus possible to detect devitrification or the deformation of gas-tight container 10.
Hereinafter, with reference to the accompanying drawings of the various embodiments of the utility model.
(the 1st implementation method)
Below, the discharge lamp 1 with reference to involved by Fig. 1 illustrates the 1st implementation method.Discharge lamp 1 is shown in Fig. 1.
As shown in figure 1, the discharge lamp 1 involved by present embodiment has：Gas-tight container 10, a pair of discharge electrodes 20,20.
In the present embodiment, exemplified with the reality of the long arc discharge lamp that metal halide lamp has been used as discharge lamp 1
Apply mode.
Gas-tight container 10 is formed as straight tube-like, has discharge space 12 in the inside of gas-tight container 10.Also, by gas
The two ends of close container 10 form sealing 14,14, discharge space 12 are remained airtight.Gas-tight container 10 is by through ultraviolet
Material is made, for example, be made up of quartz glass.The external diameter of gas-tight container is 23mm, and length of illumination is (between sparking electrode 20,20
Distance) it is 375mm.
By applying electric power from a pair of discharge electrodes 20,20 to discharge space 12, make mercury, gold of the inclosure in discharge space 12
Category halide 16 and rare gas are (not shown) luminous.Discharge space 12 is configured to internal diameter for example, 20mm, length of illumination for example
It is 375mm.
Mercury seal enters discharge space 12, and applies electric power by from the outside of discharge lamp 1, radiate such as 254nm,
The ultraviolet of 365nm.The enclosed volume of mercury is, for example, 1~5mg/cm2。
Rare gas promotes electric discharge when discharge lamp 1 starts, and contributes to maintain to discharge after electric discharge starts.Rare gas
The inclosure pressure of body is, for example, 0.6kPa~7.0kPa.In addition, rare gas can be any one in xenon, argon gas, neon
Gas is planted, or can also be two or more mixed gas.
Sealing 14,14 is formed at the two ends of discharge space 12.Sealing 14,14 is by quartzy with the identical of gas-tight container 10
Glass is made.After electrode 20,20 to be arranged at desired position, by being burnt with gas (not shown) under a reduced pressure
The so-called collapsed seal that the melting plants such as device are melted and sealed forms sealing 14,14.In addition, sealing 14,14
Can be made up of quartz glass different from gas-tight container 10 etc..Also, can also be molded by based on pliers (not shown) etc.
The so-called pinch seal of device forms sealing 14,14.The length of sealing 14,14 is, for example, 30mm.
Metal halide 16 is enclosed in the inside of gas-tight container 10.Metal halide 16 is mainly fed with discharge lamp 1
Contribute to maintenance that is luminous and discharging during electric power.When not being fed with electric power on discharge lamp 1, metal halide 16 is in airtight appearance
It is most of in device 10 to exist with solid or liquid form.On the other hand, when being fed with electric power on discharge lamp 1, metal halide
16 gas-tight container 10 inner molten, one part exists in gaseous form.Metal halide 16 mainly includes mercury or iron, iodine
Change thallium.In addition, metal halide 16 can also be free from the so-called mercury-free type of mercury.
Metallic compound 18 is different from metal halide 16, helps even if being fed with electric power on discharge lamp 1 and there will not be
Luminous and electric discharge maintenance.Even if that is, being fed with electric power on discharge lamp 1, metallic compound 18 will not also be melted, gold
Category compound 18 is just melted when the excessive temperature of discharge lamp 1 is raised.That is, on fusing point, metallic compound 18 is clearly distinguishable from
Metal halide 16.As long as the fusing point of metallic compound 18 is at such as more than 1450 DEG C and less than 1500 DEG C.If metallization
The fusing point of compound 18 is less than 1450 DEG C, the then part of the metallic compound 18 for melting meeting and electric arc in the electric discharge of discharge lamp 1
Contact with and help light, the change of the characteristics of luminescence etc. can be caused, therefore the fusing point of not preferred metallic compound 18 is less than 1450
℃.On the other hand, if the fusing point of metallic compound 18 is more than 1500 DEG C, even if the deformable metal compound 18 of gas-tight container 10
Will not melt, thus the deformation of gas-tight container 10 cannot be detected, thus also the fusing point of not preferred metallic compound 18 more than 1500
℃.Therefore, as long as the fusing point of metallic compound 18 is more than 1450 DEG C and less than 1500 DEG C.Metallic compound 18 is preferably
Fusing point is more than 1450 DEG C and less than 1500 DEG C and can stably enclose in the material of gas-tight container 10.Metallic compound 18
For example preferably comprise tungsten oxide.Because metallic compound 18 includes tungsten oxide, therefore, it is possible to stably enclose in gas-tight container 10,
And the devitrification or deformation that can more accurately detect gas-tight container 10 are excessive temperature and raise.
A pair of discharge electrodes 20,20 will imported into discharge space 12 from the outside electric power for applying to come of discharge lamp 1, so that
Arc discharge is produced in discharge space 12.A pair of discharge electrodes 20,20 is arranged to a part and is embedded in sealing 14,14, and
And the both ends of discharge space 12 are arranged in mode opposite each other.A pair of discharge electrodes 20,20 has：Axial wood 22,22；Line
Circle 24,24；Paillon foil 26,26；Outer lead 28,28.
Axial wood 22,22 is used to apply electric power to discharge space 12.One end of axial wood 22,22 is prominent to discharge space 12, separately
One end is embedded in sealing 14,14.Also, it is provided with coil on one end prominent to the side of discharge space 12 of axial wood 22,22
24、24.In addition, the other end of axial wood 22,22 is connected by welding with paillon foil 26,26.Axial wood 22,22 is for example made up of tungsten.
Coil 24,24 is arranged at a side of axial wood 22,22, and coil 24,24 is put from the front end of the axial wood 22,22 in electric discharge
Temperature is penetrated, so that the temperature for suppressing axial wood 22,22 rises.One end of coil 24,24 is arranged at a side of axial wood 22,22 (i.e.,
The side of discharge space 12), the other end is arranged at the another side of axial wood 22,22.Coil 24,24 is for example made up of tungsten.
Paillon foil 26,26 is embedded in sealing 14,14 and is sealed by sealing 14,14, so as to gas-tight container 10 be remained
It is airtight.The other end welding of one end of paillon foil 26,26 and axial wood 22,22, the other end of paillon foil 26,26 and outer lead 28,28
One end is welded, and paillon foil 26,26 is embedded in sealing 14,14.Paillon foil 26,26 is for example made up of molybdenum.
A part for outer lead 28,28 is embedded in sealing 14,14, and the electrical connection gas-tight container 10 of outer lead 28,28
Inside and wire 40.One end of outer lead 28,28 and paillon foil 26,26 are welded, and the other end is connected with wire 40,40.Outer lead
28th, 28 for example it is made up of molybdenum.
Pedestal 30,30 be arranged at gas-tight container 10 sealing 14,14, outer lead 28,28 and wire 40,40 it is outer
In week, prevent the connecting portion between outer lead 28,28 and wire 40,40 from exposing.Pedestal 30,30 is for example made up of ceramics.In addition,
In order that pedestal 30,30 is more firm with the chimeric of gas-tight container 10, adhesive fixed base can be for example used in pedestal 30,30
Seat 30,30 and sealing 14,14.
Wire 40,40 is used to be electrically connected to power circuit (not shown) the inside of gas-tight container 10.The one of wire 40,40
End is connected with the other end of outer lead 28,28, and the other end of wire 40,40 and power circuit etc. are connected.Wire 40,40 for example by
Annealed copper wire is made.In addition, for easy connecting wire 40,40 and power circuit, end can be set in the other end of wire 40,40
Son 50,50.
Conveyed by air blower (not shown) etc. when the discharge lamp 1 of said structure is fed with electric power and lights on discharge lamp 1
Cooling wind W and cool down.
Here, being described in more details to gas-tight container 10.
The outside wall temperature of gas-tight container 10 is preferably less than 850 DEG C.Because, if with the outside wall temperature of gas-tight container 10
Lighting is carried out as more than 900 DEG C of conditions, then gas-tight container 10 produces devitrification or the possibility of deformation to uprise.Especially, in group
In putting the inside of the irradiation unit for carrying out lighting after electric light 1, if for example, occurring in the cooling body for being arranged at irradiation unit different
Often or be input under the excessively high abnormal use condition of the electric power of discharge lamp 1 and carry out lighting, then gas-tight container 10 produce devitrification or
The possibility of deformation can be uprised.It is therefore preferable that scope of the outside wall temperature of the outer surface of discharge lamp 1 at 650 DEG C~850 DEG C or so.
Therefore, if the outside wall temperature for meeting gas-tight container 10 is less than 850 DEG C of condition, gas-tight container 10 can be suppressed
Produce devitrification or deformation etc..On the other hand, if the outside wall temperature of gas-tight container 10 turns into more than 900 DEG C, the meeting of gas-tight container 10
Produce devitrification or deformation etc..
However, gas-tight container 10 is also possible to produce devitrification or deformation in the case of in addition to being raised except excessive temperature.
For example, it is possible to the devitrification of gas-tight container 10 can be produced because enclosing in the enclosure of discharge lamp 1.Or, it is possible to can because
The heat that is produced during lighting and produce the deformation of gas-tight container 10.
Therefore, cause in order to the devitrification or deformation that detect gas-tight container 10 are raised by excessive temperature, discharge lamp 1 has
There is metallic compound 18.Because discharge lamp 1 has metallic compound 18, it is thus possible to detect devitrification or the change of gas-tight container 10
Shape is raised by excessive temperature and caused.
Here, changing the outside wall temperature of the gas-tight container 10 of discharge lamp 1 and have studied illumination sustainment rate.Appreciation condition is such as
Under.In addition, for illumination sustainment rate, by the brightness value of the main wavelength 365nm in lighting 0 hour, (ORC makes and is produced
Illumination photometer UV-35) used as 100%, and illumination when accordingly will be arbitrarily small is standardized.Also, maintained as illumination
It is more than 80% that the benchmark of rate is preferably the illumination sustainment rate after 2000 hours lighting time.
Discharge lamp 1 (general)：Internal diameter=22mm, the length=1140mm of discharge space, discharge lamp 1 entire length=
1260mm, modulating voltage=1800V, lamp current=8.3A, lamp power=16.5kW.
Outside wall temperature=750 DEG C of gas-tight container 10,850 DEG C, 900 DEG C, 1000 DEG C.Also, determined using thermocouple
The outside wall temperature of the gas-tight container 10 of discharge lamp 1.
The results are shown in Fig. 2.It is clear that by Fig. 2, if the outside wall temperature for meeting gas-tight container 10 is less than 850 DEG C of bar
Part, though then the lighting time be can also ensure that within 2000 hours more than 85% illumination sustainment rate.On the other hand, if gas-tight container
10 outside wall temperature turns into more than 900 DEG C, then when the lighting time being 2000 hours, illumination sustainment rate becomes less than 75%.Especially
It, if the outside wall temperature of gas-tight container 10 turns into 1000 DEG C, when the lighting time being 1000 hours, illumination sustainment rate has just become
Into less than 70%.Therefore, it is at 1000 hours in the lighting time when being 1000 DEG C for the outside wall temperature of gas-tight container 10
Just stopped evaluation.It follows that it is preferred that lighting discharge lamp with the condition that the outside wall temperature of gas-tight container 10 turns into less than 850 DEG C
1。
Then, calculate under identical conditions change cooling capacity when discharge lamp 1 gas-tight container 10 outside wall temperature
And the presumed value of the inner wall temperature of gas-tight container 10.In addition, for the inner wall temperature T of gas-tight container 10innerFor, due to difficulty
To measure its temperature, thus inner wall temperature T is calculated by following formulainner。
【Number 1】
Wherein, TouterFor the outside wall temperature of gas-tight container 10, γ are the ratio between the energy that is discharged in heat transfer form (dimensionless
Amount), Ws be tube wall load (W/cm), λ are the thermal conductivity factor (W/ DEG C of m) of quartz, t is quartz thickness (mm).
In addition, used as the air-supply condition of cooling wind W, the flow that will cool down wind W is 6 (m3/ min) when state be set to
100%, and the utilization rate of cooling wind W is represented with this.
Figure 3 illustrates the outside wall temperature T of the gas-tight container 10 according to actual measurementouterThe inner wall temperature T for calculatinginner
Result.It follows that the outside wall temperature of outer surface be 901 DEG C when, thus it is speculated that internal surface temperature reaches 1460 DEG C, as with oxidation
1473 DEG C of roughly the same temperature of fusing point of tungsten.
Preliminary experiment result based on the above, the outside wall temperature DEG C of utilization rate (%) and gas-tight container 10 to cooling wind W,
And whether metallic compound 18 melts and is evaluated.Specifically, the utilization of cooling wind W is changed under these experimental conditions
Rate, so that the outside wall temperature of gas-tight container 10 is gradually increasing.
Figure 4 illustrates experimental result.In addition, in fig. 4, "○" represents that metallic compound 18 is not melted, "×"
Represent that metallic compound 18 is melted.It is clear that by Fig. 4, if the utilization rate of cooling wind W is reduced to 67%, gas-tight container 10
Outside wall temperature can become 901 DEG C.Now, if reckoning result according to Fig. 3, the inner wall temperature of gas-tight container 10 turns into 1460
DEG C, it is only lower than the fusing point of tungsten oxide 13 DEG C, thus predict that tungsten oxide is not melted, but a little higher than calculating of the inner wall temperature of reality
Value, it is thus regarded that tungsten oxide has been melted.According to result it can be seen that there is association between calculated value and actual phenomenon, airtight
The inner wall temperature of container 10 is under conditions of less than 1400 DEG C, i.e., the outside wall temperature in gas-tight container 10 is less than 850 DEG C of bar
Under part, tungsten oxide is not melted.And, it is believed that reach the fusing point identical with tungsten oxide in the inner wall temperature of gas-tight container 10
Material melts at 1460 DEG C.
As the explanation carried out according to above-mentioned implementation method, according to the utility model, even if in abnormal use environment
Under carry out lighting, the condition for especially turning into more than 900 DEG C with the hull-skin temperature of gas-tight container 10 carries out lighting, it is also possible to detect
The devitrification or deformation for going out gas-tight container are raised by excessive temperature and caused.
In addition, according to the utility model, because the fusing point of metallic compound 18 is more than 1450 DEG C and less than 1500 DEG C, because
This, even if carrying out lighting with the condition that the hull-skin temperature of gas-tight container 10 turns into more than 900 DEG C, metallic compound 18 also will not
Help to light, the devitrification or deformation that can more accurately detect gas-tight container 10 are to be raised by excessive temperature and caused
's.
In addition, metallic compound 18 is enclosed in gas-tight container 10 as metallic compound 18 by using tungsten oxide
Also will not cause and chemically react and stable existence, it is thus possible to more accurately detect the devitrification of gas-tight container 10 or deform i.e.
For excessive temperature is raised.
In the above-described embodiment, the input density of per unit length has been used for the long arc lamp of 145W/cm, but, if
The use of the input density of the lamp such as per unit length of more high capacity is 160~280W/cm lamps, then needs more reasonably to control
Cooling condition is reducing temperature, it is thus possible to be applicable the utility model.Even conversely, the input density of per unit length is
The less lamp of load of below 120W/cm, it is contemplated that because of cooling device failure etc. without cooling or the relatively low shape of cooling capacity
The situation of lighting is carried out under state, it is also possible to be applicable the utility model.
In addition, in the above-described embodiment, discharge lamp 1 is the structure of so-called metal halide lamp, but can also be
Mercury and rare gas, the so-called high-pressure sodium lamp of metallic compound 18 are only sealed with without metal halide 16.
More than, some implementation methods of the present utility model are illustrated, but these implementation methods are merely illustrative,
The intention of utility model scope is not limited.These new implementation methods can be implemented in other various modes, not depart from
In the range of the utility model objective, various omissions, displacement, change etc. can be carried out.These implementation methods or its deformation are belonged to
In scope of the present utility model or objective, and it is also contained in the utility model described in technical scheme and its equivalent scope
It is interior.
Claims (2)
1. a kind of long arc discharge lamp, it radiates ultraviolet, and the discharge lamp is characterised by possessing：
Inside is hermetically sealed and the gas-tight container of a pair of electrodes is engaged in mode opposite each other at two ends；
Enclose in the metal halide of the inside of the gas-tight container；
Fusing point is higher than the fusing point of the metal halide, and fusing point is the metal compound of more than 1450 DEG C and less than 1500 DEG C
Thing.
2. long arc discharge lamp according to claim 1, it is characterised in that
The metallic compound includes tungsten oxide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-035356 | 2016-02-26 | ||
| JP2016035356A JP2017152289A (en) | 2016-02-26 | 2016-02-26 | Discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206194694U true CN206194694U (en) | 2017-05-24 |
Family
ID=58728465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621056938.6U Active CN206194694U (en) | 2016-02-26 | 2016-09-14 | Discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2017152289A (en) |
| CN (1) | CN206194694U (en) |
-
2016
- 2016-02-26 JP JP2016035356A patent/JP2017152289A/en active Pending
- 2016-09-14 CN CN201621056938.6U patent/CN206194694U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017152289A (en) | 2017-08-31 |
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