CN1963987A - Metal halide arc discharge lamp - Google Patents
Metal halide arc discharge lamp Download PDFInfo
- Publication number
- CN1963987A CN1963987A CN 200610164604 CN200610164604A CN1963987A CN 1963987 A CN1963987 A CN 1963987A CN 200610164604 CN200610164604 CN 200610164604 CN 200610164604 A CN200610164604 A CN 200610164604A CN 1963987 A CN1963987 A CN 1963987A
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- CN
- China
- Prior art keywords
- guard shield
- arc tube
- electric arc
- metal halide
- discharge lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
A metal halide arc discharge lamp ( 10 ) having a lamp envelope ( 12 ) and an arc tube ( 14 ) mounted within the envelope; a shroud ( 20 ) surrounding the arc tube ( 14 ); electrical lead-ins ( 26, 28 ) for supplying electrical energy to the arc tube ( 14 ); and a chemical fill within the arc tube to produce light when an arc is formed within the arc tube; the improvement comprising: the shroud ( 20 ) having a given thickness T and a given inside diameter ID having a relationship such that T is less than 2 mm and ID/T is less than 22.
Description
Technical field
The present invention relates to metal halide arc discharge lamp, and relate more particularly to use this lamp of guard shield (shroud).More particularly, the present invention relates to have increase is provided under the situation of the non-passive fault of electric arc tube volume can this lamp of guard shield.
Background technology
The sequence number that the application requires to submit on November 16th, 2005 is the priority of the temporary patent application of No 60/735,233.
Metal halide arc discharge lamp is owing to usually are used in commercial the application in its high-luminous-efficiency and long useful life.Typical metal halide arc discharge lamp comprises and is sealed the silica electric arc tube that is sealed in quartzy in the Pyrex shell or fuse is housed.The electric arc tube of airtight sealing itself has and is sealed to the tungsten electrode in the opposite end and comprises filler, and this filler comprises the rare gas of mercury, metal halide additives and promotion starting.In some cases, particularly in high-wattage lamp, shell is full of subatmospheric nitrogen or other inert gases.In other cases, particularly in low watt electric light, shell is evacuated.
Have been found that to it is desirable to that this guard shield comprises and be generally columniform, light-permeable element (such as quartz) that this element can bear elevated operating temperature to metal halide arc discharge lamp equipment guard shield.By coaxial installation, wherein, electric arc tube is positioned at guard shield in lamp housing for electric arc tube and guard shield.Preferably, guard shield is the pipe of both ends open.In other cases, guard shield one end opening and the other end has hemispheric structure.The guard shield of metal halide arc discharge lamp is disclosed in people such as Fohl in laid-open U.S. Patents No.4 on February 12nd, 1985,499,396, people such as Fohl is in laid-open U.S. Patents No.4 on April 8th, 1986,580,989 and people such as Keeffe in laid-open U.S. Patents No.4 on December 19th, 1989, in 888,517.Also can be referring to people such as Bechard in laid-open U.S. Patents No.4 on July 28th, 1981,281,274.People's such as Parrott U.S. Patent No. 5,122,706 instruction, if the external diameter of electric arc tube (OD) than the little 3mm of internal diameter (ID) of guard shield, then volume can be increased.
Guard shield has some benefit for the work of lamp.In the lamp with inflation shell, thereby guard shield has reduced the colour temperature that the convective heat loss of electric arc tube has also improved luminous output and lamp.In having the lamp of rarefied shell, guard shield helps the temperature of balanced electric arc tube.At last, under the situation that electric arc tube is smashed, guard shield can strengthen the fail safe of lamp by serving as storing apparatus; Yet when having been found that the non-passive fault of electric arc tube, its fragment can make the guard shield fragmentation, and the fragment of guard shield may become the reason that can make the shell fragmentation, and expectation stops the guard shield present case.
Summary of the invention
Therefore, the objective of the invention is to get rid of the deficiencies in the prior art.
Another object of the present invention is to reduce the cost of metal halide arc discharge lamp.
In one aspect of the invention, these purposes realize that by metal halide arc discharge lamp is provided this metal halide arc discharge lamp has: lamp housing and the electric arc tube that is installed in the described shell; Guard shield around described electric arc tube; Be used for electric lead-in to the power supply of described electric arc tube; With the chemical fill in the described electric arc tube, when being used in electric arc is formed on described electric arc tube, this chemical fill produces light; Improvement project comprises: described guard shield has given thickness T and given inner diameter, ID, this given thickness T and given inner diameter, ID have T less than 2mm and ID/T less than 22 relation.
Thin guard shield has reduced the kinetic energy of the guard shield fragment under the situation of the non-passive fault of electric arc tube, and wall thickness that should be thin and the ID that is reduced reduce the total weight of guard shield together and reduce cost, have surpassed the desired value of people such as Parrot even the distance between the ID of the OD of electric arc tube and guard shield has increased.
Description of drawings
Fig. 1 is a perspective view of using discharge light with metal halide of the present invention;
Fig. 2 is the sectional view of arc tube shield according to an aspect of the present invention; And
Fig. 3 is a sectional view of using the interchangeable embodiment of discharge light with metal halide of the present invention.
Embodiment
In order to understand the present invention better, and understand other purpose of the present invention or further purpose, advantage and performance better, can be in conjunction with following disclosure of above-mentioned referenced drawings and appended claim.
Now in more detail with reference to the accompanying drawings, Fig. 1 shows the first exemplary metal halides arc discharge lamp 10, and this metal halide arc discharge lamp 10 comprises lamp housing 12 and is mounted in the enclosure electric arc tube 14 by installation frame 16.This electric arc tube is placed in the guard shield 20, and this guard shield 20 also can be supported by installation frame 16.By pedestal 22, lamp stand 24 and electric lead 26 and 28 couple electrical energy is arrived electric arc tube 14.As everyone knows, electric arc tube comprises the material of chemical fill or doses, to send light when electric arc is activated therein.Guard shield 20 comprises the printing opacity such as quartz, the cylindrical tube of heat proof material.But as mentioned above, guard shield has a lot of functions, and its major function is to hold the electric arc tube fragment under the situation of unlikely non-passive electric arc tube fault.
As described, in this specific example, electric arc tube 14 and guard shield 20 that installation frame 16 supports in the lamp housing 12.Installation frame 16 comprises the metallic support rod 30 that is attached to lamp stand 24 by belt 31.This support bar engages with inwardly protruding thing 32 in lamp housing 12 upper ends.Support bar 30 therebetween partial parallel in the central shaft of electric arc tube 14 and guard shield 20.Installation frame 16 also comprises folder 40 and following folder 42, on press from both sides 40 and down folder 42 electric arc tube 14 and guard shield 20 are fixed to support bar 30.Clip 40 and 42 is attached on the support bar 30, preferably is attached on the support bar 30 by welding.
Use guard shield 20 in a plurality of examples of non-passive electric arc tube fault, to be proved to be and successfully held the fragment that the electric arc tube explosion produces; But, find that also the fragment that broken guard shield sends usually makes the shell fragmentation, this is that guard shield is expected protected truth.
Have been found that thickness (T) and internal diameter (ID) by control guard shield wall, so that T＜2 and ID/T be less than 22, afterwards a problem can be eliminated, and the cost of guard shield can significantly reduce.
In the specific embodiment of 400 watts of protected electric lights, thereby be that 1.5mm and ID are that the quartzy guard shield that 32mm obtains 21.33 ID/T can satisfy these conditions by wall thickness.
The present invention can be used for other forms of metal halide lamp, shown in Fig. 3 like that, wherein lamp 10a has shell 12a, this shell 12a has the electric arc tube 14a that guard shield 20a is installed.Electric arc tube 14a is just like in U.S. Patent No. 4,888, the thick outer wall described in 517.Shell 12a has dome 32a, and the stop 40 on the framework 16a is inserted among this dome 32a, so that electric arc tube and cover assembly to be installed.
Utilize the present invention by dwindling guard shield, reduce Master Cost, also when from pipe cutting guard shield, causing spending to hang down reducing cost.In addition, as the patent of above-cited Parrot is instructed, have been found that the distance between electric arc tube OD and the guard shield ID is increased to greater than 3mm, in guard shield, assemble electric arc tube by improving snapping the tolerance that (tip-off) waits, still can and making things convenient for by volume test.
Though illustrated and illustrated the preferred embodiments of the present invention of present consideration, but, do not breaking away under the situation of scope of the present invention as defined by the appended claims, to its multiple variation made from revise apparent to those skilled in the art.
Claims (5)
1. wattage metal halide arc discharge lamp, it has: lamp housing and be installed in electric arc tube in the described shell; Guard shield around described electric arc tube; Be used for electric lead-in to the power supply of described electric arc tube; With the chemical fill in the described electric arc tube, when being used in electric arc is formed on described electric arc tube, this chemical fill produces light; Improvement project comprises:
Described guard shield has given thickness T and given inner diameter, ID, this given thickness T and given inner diameter, ID have T less than 2mm and ID/T less than 22 relation.
2. metal halide arc discharge lamp as claimed in claim 1, wherein, described electric arc tube and described guard shield are installed in the described shell by common framework.
3. metal halide arc discharge lamp as claimed in claim 2, wherein, described guard shield is quartzy.
4. metal halide arc discharge lamp as claimed in claim 3, wherein, described guard shield thickness is 1.5mm.
5. metal halide arc discharge lamp as claimed in claim 4, wherein, described guard shield ID is 32mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73523305P | 2005-11-09 | 2005-11-09 | |
| US60/735233 | 2005-11-09 | ||
| US11/450678 | 2006-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1963987A true CN1963987A (en) | 2007-05-16 |
Family
ID=38082992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610164604 Pending CN1963987A (en) | 2005-11-09 | 2006-11-09 | Metal halide arc discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1963987A (en) |
-
2006
- 2006-11-09 CN CN 200610164604 patent/CN1963987A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |