JPH0468743B2 - - Google Patents
Info
- Publication number
- JPH0468743B2 JPH0468743B2 JP7006384A JP7006384A JPH0468743B2 JP H0468743 B2 JPH0468743 B2 JP H0468743B2 JP 7006384 A JP7006384 A JP 7006384A JP 7006384 A JP7006384 A JP 7006384A JP H0468743 B2 JPH0468743 B2 JP H0468743B2
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- arc tube
- lamp
- excessive current
- destroyed
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims 1
- 230000006866 deterioration Effects 0.000 description 17
- 230000006378 damage Effects 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 230000001066 destructive effect Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/50—Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はヒユーズを内蔵した高圧金属蒸気放電
灯に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a high pressure metal vapor discharge lamp with a built-in fuse.
一般に高圧金属蒸気放電灯は発光管自体で電流
を制限する機能をもたないので、限流器として安
定器と組み合わせて使用される。安定器は鉄心の
上に絶縁被覆を施した金属線を多層に巻回したチ
ヨークコイルが多用され、その他コンデンサを並
用したもの等が使用されている。
Generally, high-pressure metal vapor discharge lamps do not have the function of limiting the current in the arc tube itself, so they are used in combination with a ballast as a current limiter. Stabilizers are often made of chiyoke coils, which are made by winding insulated metal wire in multiple layers around an iron core, and other devices that also use capacitors.
ところで安定器の寿命は通常８〜10年とされて
おり、寿命原因の多くは絶縁物の劣化による限流
機能の低下である。たとえば高圧ナトリウムラン
プは始動電圧が高いので安定器またはランプの外
管内に収容したパルス発生器から始動用高圧パル
スを印加して起動させるようになつており、この
高圧パルスのために安定器の絶縁物の劣化を早め
る傾向があり、かつ劣化をはじめた安定器を高圧
パルスによつて強制的に絶縁破壊させることがあ
る。 By the way, the lifespan of a ballast is usually 8 to 10 years, and the main cause of the lifespan is a decline in current limiting function due to deterioration of the insulator. For example, high-pressure sodium lamps have a high starting voltage, so they are started by applying a starting high-voltage pulse from a ballast or a pulse generator housed inside the lamp's outer bulb. It tends to accelerate the deterioration of objects, and high-voltage pulses can force dielectric breakdown of ballasts that have begun to deteriorate.
安定器が寿命末期あるいは他の原因で限流機能
を失うとランプには多大な電流が流れ、この結
果、発光管に投入されるランプ入力が急増して発
光管内の封入物の圧力が急速に高まるため発光管
が破壊し、さらに外管までも破損させてこれらの
破片が落下するに至ることもある。 When the ballast loses its current limiting function at the end of its life or for other reasons, a large amount of current flows through the lamp, resulting in a rapid increase in the lamp input into the arc tube and the pressure of the fill in the arc tube. This can cause the arc tube to break and even the outer tube to fall, causing these pieces to fall.
このため、発光管の破壊を防止する手段とし
て、たとえば特開昭57−138767号公報、特開昭58
−146353号公報などは発光管への給電回路の途中
にヒユーズを挿入して過大電流突入時にこのヒユ
ーズが発光管が破壊するよりも先に溶断するよう
にした方法が提案されている。 For this reason, as a means to prevent the destruction of the arc tube, for example, Japanese Patent Laid-Open No. 57-138767 and Japanese Patent Laid-Open No. 58
Publication No. 146353 and others proposes a method in which a fuse is inserted in the middle of the power supply circuit to the arc tube so that when an excessive current rushes in, this fuse blows out before the arc tube is destroyed.
ヒユーズはこれ等公報にも示されているように
内部が不活性ガス雰囲気または真空となつている
外管内に収納した方が口金内に収納するよりも変
質することが少なく、さらに組立作業も容易で、
動作の確実性において優れている。 As indicated in these publications, it is better to store the fuse in an outer tube with an inert gas atmosphere or vacuum inside than to store it in the cap, and it is easier to assemble. in,
Excellent in reliability of operation.
しかしながら、このようにヒユーズを発光管の
点灯回路に対して直列に接続し、かつ同一の外管
内に収納したものにおいても、次のような不都合
を生じることが本発明等の試験の結果判明した。
すなわち、上記特開昭57−138767号公報所載のヒ
ユーズの溶断電流をＩ〔Ａ〕、溶断時間をｔ〔秒〕
としたとき、
log10I＋0.33log10t≦1.85（ただし0.05秒≦ｔ≦３
秒）の領域に溶断点を持つたヒユーズを用いて
種々のランプを作り実用試験を行つたところ、ヒ
ユーズの本来の機能においては問題は生じなかつ
たが、長時間点灯後において通常の点灯時すなわ
ち過大電流が流れなくてもヒユーズが溶断する現
象を生じた。この現象は早いものでは2000時間を
越えると、また遅いものでも8000時間を越えると
発生した。 However, as a result of tests conducted by the present invention, it has been found that even when the fuse is connected in series with the lighting circuit of the arc tube and housed in the same outer bulb, the following disadvantages occur. .
That is, the blowing current of the fuse described in JP-A-57-138767 is I [A], and the blowing time is t [seconds].
When, log 10 I＋0.33log 10 t≦1.85 (however, 0.05 seconds≦t≦3
When we made various lamps using fuses with a melting point in the region of This caused the fuse to blow even when no excessive current was flowing. This phenomenon occurred as early as over 2000 hours, and as late as over 8000 hours.
この溶断の原因について種々調査したところ、
ヒユーズがランプの長時間点灯の間に劣化が進
み、通常の点灯における電流においても溶断が生
じたものであることが判つた。この寿命中の劣化
は、発光管への給電回路に過大電流が流れた場合
に、ヒユーズは発光管が破壊するより先に確実に
溶断するように比較的小径（たとえば660Wのラ
ンプでニツケル線からなるヒユーズの径は0.6mm）
に設計してあるため、ランプ寿命中に繰返えされ
る始動時の電流（通常安定時電流の約1.5倍）に
より劣化すなわち線径が細ることによるものであ
る。 After various investigations into the causes of this meltdown, we found that
It was determined that the fuse had deteriorated as the lamp was being lit for a long period of time, and that it had blown out even when the current was applied during normal lighting. This deterioration during the lifespan is caused by the fact that the fuse has a relatively small diameter (for example, in a 660W lamp, it is made of nickel wire) to ensure that if excessive current flows in the power supply circuit to the arc tube, it will blow out before the arc tube is destroyed. (The diameter of the fuse is 0.6mm)
This is due to deterioration, or thinning of the wire diameter, due to the repeated starting current (usually about 1.5 times the stable current) during the life of the lamp.
このランプ寿命中の通常点灯でのヒユーズ溶断
は、外管内のヒユーズ取付け位置を変えてもさし
て効果はなかつた。すなわち、ヒユーズをステム
近傍などの比較的点灯中に低温となる個所に取付
けた場合はヒユーズの溶断が生じるまでの時間は
遅くはなるが、ランプの寿命までには上記溶断が
生じてしまい、一方、ヒユーズを発光管近傍に取
付けた場合は点灯中に発光管からの熱を受けてヒ
ユーズは高温となりヒユーズの通常の電流におけ
る溶断までの時間はより短かくなる傾向にある。 Changing the fuse mounting position within the outer tube did not have much effect on the fuse blowing during normal lighting during the life of the lamp. In other words, if the fuse is installed in a location that is relatively cold during lighting, such as near the stem, it will take longer for the fuse to blow out, but the above-mentioned blowout will occur within the life of the lamp. If the fuse is installed near the arc tube, the fuse receives heat from the arc tube during lighting and becomes hot, and the time it takes for the fuse to blow under normal current tends to be shorter.
このように安定器の絶縁劣化による過大電流が
ランプに流れた場合、発光管の破壊を確実に防止
し、しかもこの作用がランプの寿命末期に至るま
で他の悪影響を受けることなく確実に維持するこ
とができるようなヒユーズを得ることは困難であ
つた。 In this way, if excessive current flows through the lamp due to insulation deterioration in the ballast, destruction of the arc tube is reliably prevented, and this action is reliably maintained until the end of the lamp's life without any other negative effects. It was difficult to obtain such a fuse.
本発明は上期事情に対処してなされたもので、
安定器の絶縁劣化が生じてもヒユーズ機能がラン
プの始動時および点灯時のいづれの場合でもラン
プの寿命末期まで確実に作用して発光管の破壊を
防止することができる高圧金属蒸気放電灯を提供
することを目的とする。
This invention was made in response to the circumstances in the first half of the year.
Even if insulation deterioration occurs in the ballast, the fuse function works reliably until the end of the lamp's life, both when starting and lighting the lamp, to prevent damage to the arc tube. The purpose is to provide.
本発明は外管内に発光管および発光管の給電回
路に直列に過電流によつて溶断するヒユーズを収
納した高圧金属蒸気放電灯において、上記ヒユー
ズは周囲温度を常温にて作動させた場合にランプ
始動時には過大電流が突入しても発光管の破壊前
に溶断し、一方、ランプ安定点灯時には過大電流
が突入しても発光管の破壊前には溶断しない特性
を有し、かつこのようなヒユーズを発光管の近傍
に設置したことを特徴とする。
The present invention provides a high-pressure metal vapor discharge lamp in which an arc tube and a fuse that is blown by an overcurrent are housed in series with an arc tube and a power supply circuit for the arc tube in an outer bulb. This type of fuse has the characteristic that even if an excessive current rushes in at startup, it will blow out before the arc tube is destroyed, but when the lamp is stably lit, even if an excessive current rushes in, it will not blow out before the arc tube is destroyed. It is characterized in that it is installed near the arc tube.
本発明者等は発光管の破壊特性について詳細に
検討した結果、破壊特性は第１図に示すようにラ
ンプの始動時と安定点灯時とでは異なることを発
見した。第１図は横軸に過大電流値〔Ａ〕、縦軸
に発光管の破壊に至るまでの時間（秒）およびヒ
ユーズの溶断に至るまでの時間（秒）をとり、実
線ａは定格電力660Wの高圧ナトリウムランプの
安定点灯時における発光管の破壊特性を、実線ｂ
は同じく始動時の破壊特性を示す。図から明らか
な通り発光管に過大電流が流れた場合でも、安定
点灯時よりも始動時の方が破壊しにくいことが判
る。
The inventors of the present invention conducted a detailed study on the destructive characteristics of arc tubes, and found that the destructive characteristics differ between when the lamp is started and when the lamp is stably lit, as shown in FIG. In Figure 1, the horizontal axis is the excessive current value [A], the vertical axis is the time (seconds) until the arc tube is destroyed, and the time (seconds) until the fuse blows out, and the solid line a is the rated power 660W. The solid line b represents the breakdown characteristics of the arc tube during stable lighting of the high-pressure sodium lamp.
also shows the destructive characteristics at startup. As is clear from the figure, even if an excessive current flows through the arc tube, it is less likely to break down during startup than during stable lighting.
この理由は、始動時には発光管が冷えた状態に
あるから過大電流が流れても発光管の温度上昇に
は時間を要し、したがつて発光管が昇温している
安定点灯時に較べて破壊に至るまでの時間が長く
なり破壊しにくくなつているものと考えられる。 The reason for this is that the arc tube is in a cold state at the time of startup, so even if an excessive current flows, it takes time for the temperature of the arc tube to rise, and therefore the arc tube is more likely to be destroyed than during stable lighting when the temperature is rising. It is thought that the time it takes to reach this point is longer and it is becoming more difficult to destroy.
本発明者等は上記破壊特性の差を利用すること
によつて、長時間使用しても問題なく、かつ確実
に発光管の破壊を防止することができるヒユーズ
内蔵の高圧金属蒸気放電灯を得られるようにし
た。 By utilizing the above-mentioned difference in destruction characteristics, the present inventors have created a high-pressure metal vapor discharge lamp with a built-in fuse that can be used for a long time without any problems and that can reliably prevent destruction of the arc tube. I made it possible to do so.
次に上記発光管の角破壊特性とヒユーズの溶断
特性との関係について上記第１図を参照して説明
する。同図において各破線ｃ，ｄはヒユーズの溶
断特性を示し、破線ｄは径1.1mmのニツケル線か
らなるヒユーズ、破線ｃはより細い径0.6mmのニ
ツケル線からなるヒユーズの溶断特性である。 Next, the relationship between the angular breaking characteristics of the arc tube and the fusing characteristics of the fuse will be explained with reference to FIG. 1. In the figure, broken lines c and d indicate the fusing characteristics of the fuses, where the broken line d represents the fuse made of a nickel wire with a diameter of 1.1 mm, and the broken line c shows the fusing characteristics of a fuse made of a thinner nickel wire with a diameter of 0.6 mm.
いま破線ｃに示す細いヒユーズの溶断特性を実
線ａに示す安定点灯時の発光管の破壊特性に近づ
けようとするほどヒユーズの径は太くする必要が
あり、したがつてランプ寿命中のヒユーズの劣化
（線径の細り）は減少する。しかしながら、実線
ａを越えるほどにヒユーズ線径を太くし、たとえ
ば破線ｄの溶断特性を持つほどに太くすると、ヒ
ユーズ自体の劣化の問題は解消するとしても、ラ
ンプ安定点灯時に過大電流が流れた場合にこのヒ
ユーズでは発光管の破壊前には溶断しなくなり、
本来の目的が達成できなくなつてしまう。もつと
も、この破線ｄのヒユーズ溶断特性は実線ｄより
下方にあるから始動時の発光管破壊防止には十分
役立つものである。 In order to bring the fusing characteristics of the thin fuse shown by the broken line c closer to the destruction characteristics of the arc tube during stable lighting shown by the solid line a, the diameter of the fuse needs to be made larger, and therefore the deterioration of the fuse during the life of the lamp is reduced. (thinner wire diameter) decreases. However, if the diameter of the fuse wire is made thick enough to exceed the solid line a, for example, so that it has the fusing characteristics shown by the broken line d, the problem of deterioration of the fuse itself will be resolved, but if an excessive current flows when the lamp is stably lit, This fuse will no longer blow out before the arc tube is destroyed.
It becomes impossible to achieve the original purpose. However, since the fuse blowing characteristic indicated by the broken line d is below that of the solid line d, it is sufficiently useful for preventing destruction of the arc tube during startup.
このような実線ａとｂとの中間に溶断特性を有
するたとえば破線ｄのヒユーズ、すなわちランプ
の安定点灯時にはヒユーズとしての役目は果たさ
ないが、ランプの始動時には発光管の破裂を防止
することができるヒユーズを選び、このヒユーズ
をランプ外管内の各部位にその取り付け位置を変
えて試験したところ次のことが判明した。 For example, a fuse indicated by a broken line d, which has a fusing characteristic between solid lines a and b, does not function as a fuse when the lamp is stably lit, but can prevent the arc tube from bursting when the lamp is started. After selecting a fuse and testing it by changing the installation position of this fuse to various parts within the lamp outer bulb, the following was found.
すなわち、上記ヒユーズをランプ外管内の比較
的低温部であるたとえばステムの近傍に取り付け
た場合は、ランプの長期寿命中においても通常電
流による溶断は発生しなかつたが、ヒユーズ本来
の機能である安定点灯時に異常な過大電流が流れ
た場合の発光管破壊防止には役立たなかつた。と
ころが、ヒユーズを発光管の近傍部つまりランプ
外管内の高温部に取り付けると、上記低温部に取
り付けた場合と同様にランプの長期寿命中におい
ても通常電流による溶断が発生しないばかりか、
安定点灯時に過大電流が流れた場合にも確実にヒ
ユーズが先に溶断して発光管の破壊を防止するこ
とができた。また、ランプ始動時においても発光
管の破壊を防止できたことは言うまでもないこと
である。このような結果が得られた理由は次のよ
うに考えられる。 In other words, when the above-mentioned fuse was installed in a relatively low-temperature part of the lamp outer bulb, for example, near the stem, it did not melt due to normal current even during the long life of the lamp, but the fuse's original function of stability It was not useful in preventing the arc tube from being destroyed in the event that an abnormally excessive current flows during lighting. However, if the fuse is installed in the vicinity of the arc tube, that is, in the high-temperature part of the lamp's outer bulb, it will not only not blow out due to normal current even during the long life of the lamp, as when it is installed in the low-temperature part mentioned above.
Even if an excessive current flows during stable lighting, the fuse reliably blows out first, preventing damage to the arc tube. It goes without saying that the arc tube could be prevented from being destroyed even when the lamp was started. The reason why such a result was obtained is thought to be as follows.
まず、ヒユーズの長期寿命中の劣化については
上記ヒユーズの線径が従来のものに較べ太いため
ランプ始動時の電流による劣化の進行が少なくな
り、このためランプの長期寿命にわたり通常の電
流による溶断を生じない。また、点灯中に発光管
からの熱によりヒユーズの温度は高くなるが、こ
れによるヒユーズの劣化は問題とならない程度の
ものである。 First, regarding the deterioration of the fuse during its long life, the wire diameter of the fuse mentioned above is thicker than conventional ones, so deterioration progresses less due to the current when starting the lamp. Does not occur. Further, the temperature of the fuse increases due to heat from the arc tube during lighting, but the deterioration of the fuse due to this is not a problem.
一方、安定点灯時の過大電流については、ヒユ
ーズ自体の周囲温度が低いときは、その溶断特性
は第１図ｄに示す通りであるが、発光管の近傍に
設置し、発光管の熱により高温となつた場合はヒ
ユーズ自体の溶断特性が変化して、より溶断しや
すくなるためである。すなわち、ヒユーズを高温
で作動させる場合、より小径のヒユーズと同様の
溶断特性となり、安定点灯中に過大電流が流れる
と発光管の破壊よりも先にヒユーズが溶断するも
のである。 On the other hand, regarding excessive current during stable lighting, when the ambient temperature of the fuse itself is low, its fusing characteristics are as shown in Figure 1d. If this happens, the fusing characteristics of the fuse itself will change, making it more likely to blow out. That is, when a fuse is operated at high temperature, it has the same fusing characteristics as a smaller diameter fuse, and if an excessive current flows during stable lighting, the fuse will blow out before the arc tube is destroyed.
第２図は本発明の一実施例〔実施例１〕である
定格電力660Wの高圧ナトリウムランプを示す。 FIG. 2 shows a high-pressure sodium lamp with a rated power of 660 W, which is an embodiment of the present invention (Example 1).
図において１は一端に口金２を装着した外管、
３は透光性アルミナセラミクスからなる発光管
で、その両端部には一対の電極４ａ，４ｂを対設
し、内部には始動用希ガス、水銀およびナトリウ
ムが封入されている。発光管３の両端はホルダ５
ａ，５ｂによつて支持され、一方のホルダ５ａは
電極４ａと電気的に接続され、他方のホルダ５ｂ
は絶縁物６を介して支持している。 In the figure, 1 is an outer tube with a cap 2 attached to one end;
Reference numeral 3 denotes an arc tube made of translucent alumina ceramics, with a pair of electrodes 4a and 4b disposed opposite each other at both ends thereof, and a starting rare gas, mercury, and sodium sealed inside. Both ends of the arc tube 3 are holder 5
a, 5b, one holder 5a is electrically connected to the electrode 4a, and the other holder 5b
is supported via an insulator 6.
また、上記ホルダ５ａ，５ｂは導電線兼用のサ
ポート７に接続し、このサポート７はステム８に
封着した一方のウエルズ９に接続し、他方のウエ
ルズ１０には導電線１１を介して電極４ｂが連続
している。１２は発光管３に沿わせた近接導体、
１３は始動装置でフイラメント１４と常閉形バイ
メタルスイツチ１５との直列回路からなり、この
直列回路は発光管３と並列に接続されている。１
６はたとえば径1.1mmのニツケル線からなるヒユ
ーズで、絶縁被覆管１７内に収納され、その両端
はたとえばタングステン製の取出し線１８，１８
を介して電極４ｂと導電線１１との間、つまり発
光管３の点灯回路に対して直列に接続されてい
る。ヒユーズ１６の取付け位置は発光管３の近傍
にすることが必要で、通常の点灯状態でヒユーズ
１６自体の温度が400℃を越え、特には500℃以上
になるような位置に設置されることが望ましい。 Further, the holders 5a and 5b are connected to a support 7 which also serves as a conductive wire, and this support 7 is connected to one well 9 sealed to the stem 8, and an electrode 4b is connected to the other well 10 via a conductive wire 11. are continuous. 12 is a nearby conductor along the arc tube 3;
Reference numeral 13 denotes a starter device, which consists of a series circuit of a filament 14 and a normally closed bimetal switch 15, and this series circuit is connected in parallel with the arc tube 3. 1
Reference numeral 6 denotes a fuse made of, for example, a nickel wire with a diameter of 1.1 mm, which is housed in an insulated tube 17, and both ends of which are connected to lead wires 18, 18 made of, for example, tungsten.
It is connected in series between the electrode 4b and the conductive wire 11, that is, to the lighting circuit of the arc tube 3 via. The installation position of the fuse 16 must be near the arc tube 3, and it must not be installed in a location where the temperature of the fuse 16 itself exceeds 400°C, especially 500°C or higher under normal lighting conditions. desirable.
このランプはチヨークコイル形安定器を介して
交流電源に接続して使用される。 This lamp is used by connecting to an AC power source via a chiyoke coil ballast.
このように構成されたランプ50本につき点灯試
験をした結果、定格寿命12000時間の点灯におい
て、ヒユーズ１６の劣化にもとづく通常点灯時の
ヒユーズ溶断は発生しなかつたし、またランプ寿
命の初期、中間および末期において、安定点灯中
のものに過大電流を流して試験したところ、全数
が発光管の破壊よりも先にヒユーズが溶断して十
分にその目的を達成することができた。 As a result of lighting tests on 50 lamps configured in this way, no fuse blowout during normal lighting due to deterioration of the fuse 16 occurred during lighting with a rated life of 12,000 hours, and no fuse blowout occurred during normal lighting due to deterioration of the fuse 16. In the final stage, when we tested the lamps by passing an excessive current through them while they were stably lit, we found that in all cases the fuses fused before the arc tubes were destroyed, and we were able to fully accomplish our purpose.
なお、ヒユーズとしては第１図の実線ａとｂと
の間に溶断特性を有するものであれば、いずれも
ランプ寿命中のヒユーズ劣化による溶断もなく、
かつ安定点灯中の過大電流による発光管の破壊も
確実に防止することができる。 Note that as long as the fuse has fusing characteristics between the solid lines a and b in Figure 1, it will not blow out due to fuse deterioration during the life of the lamp.
Furthermore, destruction of the arc tube due to excessive current during stable lighting can be reliably prevented.
次に他の実施例〔実施例２〕として定格電力
220Wの高圧ナトリウムランプの場合について説
明する。 Next, as another example [Example 2], the rated power
The case of a 220W high-pressure sodium lamp will be explained.
第３図はこのランプの破壊特性を示すもので、
横軸に過大電流値Ａ、縦軸には発光管の破壊に至
るまでの時間（秒）およびヒユーズの溶断に至る
までの時間（秒）をとり、実線ａは上記ランプの
安定点灯時における発光管の破壊特性を、実線ｂ
は同じく始動時の破壊特性を、破線ｃはたとえば
径0.6mmのニツケル線からなるヒユーズの溶断特
性を示す。 Figure 3 shows the destructive characteristics of this lamp.
The horizontal axis is the overcurrent value A, the vertical axis is the time (seconds) until the arc tube is destroyed, and the time (seconds) until the fuse blows out, and the solid line a is the light emission when the lamp is stably lit. The fracture characteristics of the pipe are shown by the solid line b.
Similarly, the broken line c shows the breaking characteristics at the time of starting, and the broken line c shows the fusing characteristics of a fuse made of nickel wire with a diameter of 0.6 mm.
この〔実施例２〕の場合も〔実施例１〕と同様
に発光管に過大電流が流れた場合、発光管は安定
点灯時（実線ａ）よりも始動時（実線ｂ）の方が
破壊しにくいことが判る。 In the case of this [Example 2], as in [Example 1], if an excessive current flows through the arc tube, the arc tube is more likely to be destroyed during startup (solid line b) than during stable lighting (solid line a). It turns out to be difficult.
したがつて、実線ａとｂとの中間に溶断特性を
有する破線ｃのようなヒユーズを使用し、かつ発
光管近傍に設置するようにすれば、〔実施例１〕
と同様にランプ寿命中のヒユーズ劣化による溶断
もなく、かつ安定点灯中の過大電流による発光管
の破壊も確実に防止することができた。 Therefore, if a fuse like the one shown by the broken line c, which has a fusing characteristic between the solid lines a and b, is used and installed near the arc tube, [Example 1]
Similarly, there was no blowout due to fuse deterioration during the life of the lamp, and destruction of the arc tube due to excessive current during stable lighting was reliably prevented.
なお、本発明は上記実施例に限られるものでは
なく、ヒユーズとしては周囲温度を常温にて作動
させた場合にランプ始動時には過大電流が流れる
と発光管の破壊前に溶断し、ランプ安定点灯時に
は過大電流が流れても発光管の破壊前には溶断し
ない特性を有するものを選定し、しかもこのよう
なヒユーズを発光管の近傍の高温となる位置に設
置すれば良いのであるから、ヒユーズの形状は線
状に限らず箔状、板状のものでも良く、また材質
もニツケルに限らずニツケル合金、コンスタンタ
ン、モネルメタル等他のものでも良い。さらにラ
ンプ品種についても上記実施例に示した品種に限
定されるものでなく、他の大きさの高圧ナトリウ
ムランプにも適用でき、さらにメタルハライドラ
ンプ等の他の高圧金属蒸気放電灯にも適用できる
ものである。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and when the fuse is operated at room temperature, if an excessive current flows when starting the lamp, it will melt before the arc tube is destroyed, and when the lamp is stably lit, it will blow out. The shape of the fuse should be selected so that it will not blow out before the arc tube is destroyed even if an excessive current flows, and the fuse should be installed in a location near the arc tube where the temperature will be high. It is not limited to a wire shape, but may be a foil or plate shape, and the material is not limited to nickel, but may be other materials such as nickel alloy, constantan, monel metal, etc. Furthermore, the lamp types are not limited to those shown in the examples above, but can also be applied to high-pressure sodium lamps of other sizes, and can also be applied to other high-pressure metal vapor discharge lamps such as metal halide lamps. It is.
以上詳述したように本発明は外管内の発光管の
給電回路に直列に組込むヒユーズの特性とその設
置位置とを規制することによつて、安定器の絶縁
劣化による限流機能の低下によつて上記給電回路
に過大電流が流れるような事態が発生しても、ヒ
ユーズ機能がランプの始動時および点灯時のいづ
れの場合でもランプの寿命末期まで確実に作用し
て発光管の破壊を防止して、ランプの破片の飛散
による危険を未然に防ぐことができる。
As described in detail above, the present invention prevents the deterioration of the current limiting function due to insulation deterioration of the ballast by regulating the characteristics and installation position of the fuse that is installed in series with the power supply circuit of the arc tube in the outer bulb. Therefore, even if an excessive current flows in the above-mentioned power supply circuit, the fuse function will work reliably until the end of the lamp's life, preventing the arc tube from being destroyed, both when the lamp is started and when it is lit. This will prevent danger from flying lamp fragments.
第１図は本発明の一実施例における発光管の破
壊特性とヒユーズの溶断特性との関係説明図、第
２図は同実施例の正面図、第３図は他の実施例に
おける発光管の破壊特性とヒユーズの溶断特性と
の関係説明図を示す。
１……外管、３……発光管、４ａ，４ｂ……電
極、１１……導電線、１６……ヒユーズ、１７…
…絶縁被覆管。
Fig. 1 is an explanatory diagram of the relationship between the breakdown characteristics of the arc tube and the fusing characteristics of the fuse in one embodiment of the present invention, Fig. 2 is a front view of the same embodiment, and Fig. 3 is a diagram of the arc tube in another embodiment. An explanatory diagram showing the relationship between fracture characteristics and fuse blowing characteristics. DESCRIPTION OF SYMBOLS 1... Outer tube, 3... Arc tube, 4a, 4b... Electrode, 11... Conductive wire, 16... Fuse, 17...
...Insulating cladding tube.
Claims (1)
列に過大電流によつて溶断するヒユーズを収納し
た高圧金属蒸気放電灯において、上記ヒユーズは
周囲温度を常温にて作動させた場合に、ランプ始
動時には過大電流が流れると発光管の破壊前に溶
断し、またランプ安定点灯時には過大電流が流れ
ても発光管の破壊前には溶断しない特性を有し、
かつこのようなヒユーズを発光管の近傍に設置し
たことを特徴とする高圧金属蒸気放電灯。1. In a high-pressure metal vapor discharge lamp in which a fuse that melts due to excessive current is housed in the outer bulb in series with the arc tube and the arc tube's power supply circuit, the fuse cannot be started when the lamp is operated at room temperature. Sometimes, when an excessive current flows, it will melt before the arc tube is destroyed, and when the lamp is stably lit, even if an excessive current flows, it will not melt before the arc tube is destroyed.
A high-pressure metal vapor discharge lamp characterized in that such a fuse is installed near the arc tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7006384A JPS60216437A (en) | 1984-04-10 | 1984-04-10 | High pressure metal vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7006384A JPS60216437A (en) | 1984-04-10 | 1984-04-10 | High pressure metal vapor discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60216437A JPS60216437A (en) | 1985-10-29 |
| JPH0468743B2 true JPH0468743B2 (en) | 1992-11-04 |
Family
ID=13420704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7006384A Granted JPS60216437A (en) | 1984-04-10 | 1984-04-10 | High pressure metal vapor discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60216437A (en) |
-
1984
- 1984-04-10 JP JP7006384A patent/JPS60216437A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60216437A (en) | 1985-10-29 |
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