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JPH0432154A - Metal halide lamp device - Google Patents

Metal halide lamp device

Info

Publication number
JPH0432154A
JPH0432154A JP2134150A JP13415090A JPH0432154A JP H0432154 A JPH0432154 A JP H0432154A JP 2134150 A JP2134150 A JP 2134150A JP 13415090 A JP13415090 A JP 13415090A JP H0432154 A JPH0432154 A JP H0432154A
Authority
JP
Japan
Prior art keywords
emission tube
cap
arc tube
reflecting mirror
temperature
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.)
Pending
Application number
JP2134150A
Other languages
Japanese (ja)
Inventor
Kyoichi Sakugi
教一 柵木
Kazutoshi Kurosawa
和俊 黒澤
Tsugi Urushibara
嗣 漆原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwasaki Denki KK
Original Assignee
Iwasaki Denki KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iwasaki Denki KK filed Critical Iwasaki Denki KK
Priority to JP2134150A priority Critical patent/JPH0432154A/en
Publication of JPH0432154A publication Critical patent/JPH0432154A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

PURPOSE:To effectively reducing the temperature of the part of an emission tube that will be a high temperature part, and to achieve the longevity of a lamp device with little variation in luminous flux, color temperature, and in color rendering by introducing a high pressure air from a blowing pipe, and by blowing the air to an emission tube wall. CONSTITUTION:A reflecting mirror 10 having a paraboloid surface coated with an infrared light transmission reflecting film is provided in such a way that an emission tube will be a substantial focal point thereof, and the light distribution is directed to a specified region by the reflecting mirror 10. After the emission tube 1 is mounted on the reflecting mirror 10, a base 5 of the emission tube 1 as well as a mounting hole 11 of the reflecting mirror 10 are covered with a metal cap 13 in such a way that they are surrounded by the cap, and the cap is fixed in the outer periphery of the mounting hole 11 through a sealant 14. A blowing pipe 19 is mounted on the outer surface of the metal cap 13, in such a way that the blowing pipe 18 is communicating with the inside of the metal cap 13, and a compressed air is blown through the blowing pipe 18, and is blown into an emission tube wall through an air duct 8 of the base 5, so as to blow and cool the emission tube wall effectively. The devitrification of the emission tube can be prevented for a long time, and the deterioration in the variation of luminous flux, and in color temperature, as well as in color rendering can be prevented, and the longevity of the device can thus be achieved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、コンパクトな送風冷却手段を備え発光管の
失透速度を大幅に遅(した長寿命の高負荷メタルハライ
ドランプ装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a long-life, high-load metal halide lamp device that is equipped with a compact air cooling means and that significantly slows down the devitrification rate of the arc tube.

〔従来の技術〕[Conventional technology]

従来、外管を用いることなく発光管と反射膜とを組み合
わせて構成した比較的小型で高負荷を印加する、いわゆ
るショートアークメタルハライドランプは、その演色性
の良さと発光効率が大きいことなどの特徴により、オー
バーへラドプロジェクタやオーバーヘッドタイプのプロ
ジェクションテレビなどの光源として用いられ、普及し
つつある。
Conventionally, so-called short-arc metal halide lamps, which are relatively small and can apply high loads, are constructed by combining an arc tube and a reflective film without using an outer tube, and are characterized by good color rendering and high luminous efficiency. As a result, it is being used as a light source for overhead rad projectors and overhead-type projection televisions, and is becoming popular.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、かかるメタルハライドランプは高演色性を得る
ために希土類金属のハロゲン化物を封入しており、この
ため希土類金属特有の石英製発光管との強い反応性によ
り早期に石英管壁の高温部で失透を起こす。特に小型で
入力電力の大きい、例えば内容積当たりの電力が150
〜1500 W / cc程度のランプにおいては、こ
の現象が顕著に現れる。
However, such metal halide lamps contain rare earth metal halides in order to obtain high color rendering properties, and due to the strong reactivity of rare earth metals with the quartz arc tube, they quickly dissipate at the high temperature part of the quartz tube wall. Wake up Tooru. Particularly compact and high input power, for example, power per internal volume is 150
This phenomenon is noticeable in lamps of ~1500 W/cc.

したがって反射膜を施した放物面あるいは楕円面等の反
射面を有する反射鏡を用いて、ある特定領域に配光をも
たせても、早期に散乱を呈し、画面上のスクリーン光束
が低下してしまうという大きな問題点があった。また添
加したハロゲン化物の反応により、光源色も変化し、演
色性が低下することもあり、実用上大きな問題点となっ
ている。
Therefore, even if a reflective mirror with a reflective surface such as a parabolic or elliptical surface coated with a reflective film is used to distribute light in a specific area, scattering occurs early and the screen luminous flux on the screen decreases. There was a big problem with it. Further, due to the reaction of the added halide, the color of the light source may also change and the color rendering properties may deteriorate, which is a major problem in practical use.

この発明は、従来のメタルハライドランプ装置における
上記問題点を解消するためになされたもので、早期失透
を防止し、寿命中画面上のスクリーン光束変化1包温度
変化、並びに演色性の変化の少ない、コンパクトな送風
冷却手段を備えたメタルハライドランプ装置を提供する
ことを目的とする。
This invention was made in order to solve the above-mentioned problems in conventional metal halide lamp devices, and it prevents early devitrification and reduces the change in luminous flux on the screen during its life, the change in temperature, and the change in color rendering property. An object of the present invention is to provide a metal halide lamp device equipped with a compact air cooling means.

〔課題を解決するための手段及び作用〕上記問題点を解
決するため、本発明は、少なくとも金属ハロゲン化物を
封入した発光管を反射鏡と共に用いたメタルハライドラ
ンプ装置において、発光管の一端に送風孔を形成した口
金を設け、該口金を反射鏡の取付穴に固着して発光管を
反射鏡に取り付けると共に、前記口金及び取付穴部分を
囲むようにして送風パイプを備えた金属キャップを被せ
、該送風パイプより高圧空気を導入して発光管を送風冷
却するように構成するものである。
[Means and effects for solving the problem] In order to solve the above-mentioned problems, the present invention provides a metal halide lamp device that uses an arc tube filled with at least a metal halide together with a reflector, in which a ventilation hole is provided at one end of the arc tube. A metal cap with a blower pipe is provided so as to surround the cap and the mounting hole, and the arc tube is attached to the reflector by fixing the cap to the mounting hole of the reflector. The structure is such that higher pressure air is introduced to cool the arc tube.

このように構成したメタルハライドランプ装置において
は、金属キャップの送風パイプより高圧空気を導入する
ことにより、口金の送風孔を通して発光管の最も高温の
口金側の電極部の管壁より他方の電極部の管壁に向けて
送風が行われ、発光管管壁が効率的に送風冷却される。
In a metal halide lamp device configured in this way, high-pressure air is introduced from the air pipe of the metal cap, so that the electrode area on the arc tube's highest temperature side than the tube wall of the other electrode area passes through the air outlet of the cap. Air is blown toward the tube wall, and the wall of the arc tube is efficiently cooled.

これにより長期間に亘り発光管の失透が防止され、更に
は光束変化1色部度及び演色性の劣化が防止され、長寿
命化が計られる。
This prevents devitrification of the arc tube over a long period of time, and furthermore prevents deterioration of luminous flux change in one color area and color rendering properties, resulting in a longer service life.

〔実施例〕〔Example〕

次に実施例について説明する。第1図は、本発明に係る
メタルハライドランプ装置の一実施例の一部を破断して
示す斜視図である0図において、lは内容積0.5cc
、アーク長5.5m、発光部最大径が11.5腸の石英
からなる200W定格ランプ電力の発光管で、両端に電
極2.2′を備え、水銀及びアルゴンの他に希土類金属
ハロゲン化物として沃化ディスプロシウム、沃化ネオジ
ム、沃化セシウムを重量比で4:’2:3に選定して1
.0■封入している。電極2はエツジ付モリブデン箔3
.3′に電気的に接続され、該モリブデン箔3.3′は
更にモリブデンワイヤー4.4′に接続されている。そ
して該ワイヤー4は、発光管1の一端部に設けられた口
金5に接続され、一方ワイヤー4′には電極2の周囲の
発光管管壁に巻がれた始動補助手段として働くトリガー
線6と、ニッケルリード線7が接続されている。なお上
記口金5には直径3閣程度の送風孔8が発光管1の封止
部の薄い側に沿って2つ設けられており、また発光管1
の電極2′部分の管壁には白色耐熱酸化物からなる保温
膜9が設けられている。
Next, an example will be described. FIG. 1 is a partially cutaway perspective view of an embodiment of a metal halide lamp device according to the present invention, and in FIG. 0, l is an internal volume of 0.5 cc.
, a 200 W rated lamp power arc tube made of quartz with an arc length of 5.5 m and a maximum diameter of the light emitting part of 11.5 m, equipped with electrodes 2.2' at both ends, and containing rare earth metal halides in addition to mercury and argon. Dysprosium iodide, neodymium iodide, and cesium iodide were selected in a weight ratio of 4:'2:3.
.. 0 ■ Enclosed. Electrode 2 is edged molybdenum foil 3
.. 3', the molybdenum foil 3.3' is further connected to a molybdenum wire 4.4'. The wire 4 is then connected to a cap 5 provided at one end of the arc tube 1, while the wire 4' has a trigger wire 6 wound around the arc tube wall around the electrode 2 and serving as a starting aid. and nickel lead wire 7 are connected. The cap 5 is provided with two ventilation holes 8 having a diameter of about 3 mm along the thin side of the sealed portion of the arc tube 1.
A heat insulating film 9 made of white heat-resistant oxide is provided on the tube wall of the electrode 2' portion.

このように構成した発光管1には、該発光管lがほぼそ
の焦点となるように、赤外線透過光反射膜をコートした
放物面を有する反射鏡10が設けられ、その反射鏡10
により、ある特定領域に配光するように設定されている
。この発光管lと反射鏡10との取り付けは、該反射鏡
10に設けられている取付穴11に発光管1の口金5を
無機質接着剤12で固着して行うようにしている。
The arc tube 1 configured in this manner is provided with a reflecting mirror 10 having a parabolic surface coated with an infrared transmitting light reflecting film so that the arc tube 1 is almost at its focal point.
It is set to distribute light to a certain specific area. The arc tube 1 and the reflecting mirror 10 are attached to each other by fixing the cap 5 of the arc tube 1 to a mounting hole 11 provided in the reflecting mirror 10 with an inorganic adhesive 12.

そして、上記のように発光管1を反射鏡1oに取り付け
た後、発光管1の口金5と反射鏡10の取付穴11部分
を取り囲むようにして金属キャップ13を被せ、取付穴
11の外周との間にシール材14を介して固着している
。なお前記口金5の上端面と金属キャップ13の内底面
との間にはばね部材15が配置され両者を電気的に接続
しており、そして金属キャップ13の外端面には外部接
続端子16が設けられている。また前記ワイヤー4′に
接続されたリード線7は反射鏡10の外部へ引き出され
て、反射鏡10の外壁面に設けられた接続端子板17に
接続され、発光管1へはこの端子板17と前記外部接続
端子16から電力を供給するようになっている。更に前
記金属キャップ13の外側面には送風パイプ18が金属
キャップ13の内部と連通ずるように取り付けられてい
て、該送風パイプ18を介して圧縮空気を送り込み、口
金5の送風孔8を通して発光管管壁へ送風できるように
構成されている。
After attaching the arc tube 1 to the reflector 1o as described above, the metal cap 13 is placed so as to surround the base 5 of the arc tube 1 and the mounting hole 11 of the reflector 10, and the outer circumference of the mounting hole 11 is covered with the metal cap 13. They are fixed with a sealing material 14 in between. A spring member 15 is arranged between the upper end surface of the cap 5 and the inner bottom surface of the metal cap 13 to electrically connect the two, and an external connection terminal 16 is provided on the outer end surface of the metal cap 13. It is being Further, the lead wire 7 connected to the wire 4' is pulled out to the outside of the reflecting mirror 10 and connected to a connecting terminal plate 17 provided on the outer wall surface of the reflecting mirror 10. Power is supplied from the external connection terminal 16. Further, a blower pipe 18 is attached to the outer surface of the metal cap 13 so as to communicate with the inside of the metal cap 13, and compressed air is sent through the blower pipe 18 to the arc tube through the blowhole 8 of the base 5. It is constructed so that air can be blown to the pipe wall.

次にこのように構成されたメタルハライドランプ装置の
作用効果を確認するため、比較実験と共に行った測定実
験について説明する。まず送風を行わずに上記構成のメ
タルハライドランプを25〇七矩形波電子安定器を用い
てランプ電力150Wで点灯して、第1図においてAで
示す部分の石英発光管外表面温度を測定してみたところ
、915℃であった。仮にこのままオーバーヘッドプロ
ジェクタなどの装置に組み込んで使用すると、更に40
℃程度上昇して956”Cとなった。この温度は、発光
管内圧が従来のものと同様に25気圧の場合、約200
時間で変形を起こす温度であり、数10時間の点灯で著
しく発光管内面が白色失透を引き起こす。
Next, in order to confirm the effects of the metal halide lamp device configured as described above, a measurement experiment conducted together with a comparative experiment will be described. First, without blowing air, a metal halide lamp with the above configuration was lit with a lamp power of 150 W using a 2507 square wave electronic ballast, and the temperature of the outer surface of the quartz arc tube was measured at the part indicated by A in Fig. 1. When I looked at it, it was 915°C. If it were to be used as is in a device such as an overhead projector, it would require an additional 40
The temperature rose to 956"C by about 1.5°C. If the internal pressure of the arc tube was 25 atm as in the conventional case, this temperature would be approximately 200"C.
This is the temperature at which deformation occurs over time, and after several tens of hours of lighting, the inner surface of the arc tube becomes significantly white and devitrified.

上記実験は、定格ランプ電力以下の150Wで点灯させ
た場合であり、当初予定の200W定格ランプ電力で点
灯させた場合は、発光管管壁外表面温度は更に50’C
上昇するので、装置内に組み込み使用した場合は100
0℃を越えてしまい、失透が著しく、早期に寿命を迎え
てしまう。
The above experiment was performed when the lamp was lit at 150W, which is less than the rated lamp power.If the lamp was lit at the originally planned rated lamp power of 200W, the outer surface temperature of the arc tube wall was further increased by 50'C.
100 when used built into a device.
If the temperature exceeds 0°C, devitrification will be significant and the life will end prematurely.

これに対して本発明においては、ランプ電力150Wで
点灯させて、送風パイプ18より圧力0.1 kg/−
の空気を導入し、発光管lの同じ測定点Aの温度を測定
したところ、821℃であり、著しく温度が低下するこ
とが判った。また定格ランプ電力200Wにして測定し
たところ、送風なしの場合には上記のように50℃上昇
したのに対し、23°Cしか上昇しなかった。また装置
内に組み込み、上記のように送風を行って同じ測定点A
の温度を測定したところ、装置外において測定した温度
に比べ18°Cしか上昇していなかった。すなわち、装
置内に組み込み送風を行い定格200Wで点灯した場合
は、管壁温度(A点)は862℃にしかならず、発光管
に対してはあまり温度的な負担をかけていないことが判
明した。
In contrast, in the present invention, the lamp is lit with a power of 150 W, and the pressure from the blower pipe 18 is 0.1 kg/-.
When air was introduced and the temperature at the same measurement point A of the arc tube 1 was measured, it was found to be 821° C., indicating a significant temperature drop. Further, when the lamp was measured at a rated lamp power of 200 W, the temperature increased by only 23° C., whereas the temperature increased by 50° C. as mentioned above in the case without air blowing. In addition, it is installed in the device and blows air as described above to measure the same measurement point A.
When the temperature was measured, it was found to have increased by only 18°C compared to the temperature measured outside the apparatus. In other words, when the device was built into the device and air was blown and the lamp was lit at a rated power of 200 W, the tube wall temperature (point A) was only 862° C., and it was found that there was not much of a temperature burden on the arc tube.

また装置内に組み込み、定格ランプ電力200Wで10
00時間点灯を行ったのち、光束5色部度及び演色性を
測定したところ、それぞれ165001 m 。
In addition, it is built into the device, and the rated lamp power is 200W.
After 00 hours of lighting, the luminous flux, 5 color areas, and color rendering properties were measured and were 165,001 m, respectively.

7500に、  Ra =87から155004! m
、  7200に、  Ra=88に変わった程度であ
まり変化せず、また1000時間点灯後ランプを取り出
して調査したところ、失透も少なく発光管の変形も生じ
ていないことが確認された。
To 7500, Ra = 87 to 155004! m
, 7200, Ra=88, but not much change, and when the lamp was taken out and examined after being lit for 1000 hours, it was confirmed that there was little devitrification and no deformation of the arc tube.

〔発明の効果〕〔Effect of the invention〕

以上実施例に基づいて説明したように、本発明によれば
、送風パイプより高圧空気を導入し、発光管管壁に当て
ることにより、発光管の高温部となる部分の温度を効率
的に下げることができ、これにより長期間に亘り失透を
少なく抑えることができるので、光束3色部度、演色性
の変化が少なく長寿命で簡単な構成の反射鏡付のメタル
ハライドランプ装置が得られる。
As described above based on the embodiments, according to the present invention, high-pressure air is introduced from the blower pipe and applied to the wall of the arc tube, thereby efficiently lowering the temperature of the high temperature portion of the arc tube. As a result, devitrification can be suppressed over a long period of time, so that a metal halide lamp device with a reflecting mirror that has a long life and a simple structure with little change in luminous flux trichromaticity and color rendering properties can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明に係るメタルハライドランプ装置の一
実施例の一部を破断して示す斜視図である0図において
、1は発光管、2.2′は電極、33′はエツジ付モリ
ブデン箔、4.4′はモリブデンワイヤー、5は口金、
6はトリガー線、7はニッケルリード線、8は送風孔、
9は保温膜、10は反射鏡、11は取付穴、12は接着
剤、13は金属キャップ、14はシール材、15はばね
部材、16は外部接続端子、17は接続端子板、18は
送風パイプを示す。 1:発光管 2.2:電極 5: 口金 6: トリガー線 8:送風孔 9:保温膜 第1図 10:反射鏡 11;取付穴 12:接着剤 13:金属キャップ 14: ンール材 16:外部接続端子 18:送風パイプ
FIG. 1 is a partially cutaway perspective view of an embodiment of the metal halide lamp device according to the present invention. In FIG. Foil, 4.4' is molybdenum wire, 5 is cap,
6 is the trigger wire, 7 is the nickel lead wire, 8 is the ventilation hole,
9 is a heat insulating film, 10 is a reflective mirror, 11 is a mounting hole, 12 is an adhesive, 13 is a metal cap, 14 is a sealing material, 15 is a spring member, 16 is an external connection terminal, 17 is a connection terminal board, 18 is an air blower Showing pipes. 1: Arc tube 2.2: Electrode 5: Base 6: Trigger wire 8: Air hole 9: Heat insulating film Fig. 1 10: Reflector 11; Mounting hole 12: Adhesive 13: Metal cap 14: Nol material 16: External Connection terminal 18: Air blower pipe

Claims (1)

【特許請求の範囲】[Claims] 1、少なくとも金属ハロゲン化物を封入した発光管を反
射鏡と共に用いたメタルハライドランプ装置において、
発光管の一端に送風孔を形成した口金を設け、該口金を
反射鏡の取付穴に固着して発光管を反射鏡に取り付ける
と共に、前記口金及び取付穴部分を囲むようにして送風
パイプを備えた金属キャップを被せ、該送風パイプより
高圧空気を導入して発光管を送風冷却するようにしたこ
とを特徴とするメタルハライドランプ装置。
1. In a metal halide lamp device using an arc tube containing at least a metal halide together with a reflector,
A metal having a cap with a ventilation hole formed at one end of the arc tube, the cap being fixed to a mounting hole of a reflector to attach the arc tube to the reflector, and a vent pipe surrounding the cap and the mounting hole. 1. A metal halide lamp device, characterized in that the arc tube is cooled by cooling the arc tube by introducing a cap and introducing high-pressure air from the blowing pipe.
JP2134150A 1990-05-25 1990-05-25 Metal halide lamp device Pending JPH0432154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2134150A JPH0432154A (en) 1990-05-25 1990-05-25 Metal halide lamp device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2134150A JPH0432154A (en) 1990-05-25 1990-05-25 Metal halide lamp device

Publications (1)

Publication Number Publication Date
JPH0432154A true JPH0432154A (en) 1992-02-04

Family

ID=15121641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2134150A Pending JPH0432154A (en) 1990-05-25 1990-05-25 Metal halide lamp device

Country Status (1)

Country Link
JP (1) JPH0432154A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002541630A (en) * 1999-03-31 2002-12-03 イマックス コーポレーション Arc lamp cooling method
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