JPH10112292A - Electrodeless fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress degradation of a lamp and prolong the life by arranging a heat insulating material with low heat conductivity, between the lighting circuit of a discharge container cylindrical part and an electrolytic capacitor in an Edison base and preventing a rise in heat of the electrolytic capacitor. SOLUTION: A lighting circuit 6 is installed from the lower side of the cylindrical part 2 of a discharge container 1 to an Edison base 9, high frequencies are generated, and an exciting coil 4 wound on ferrite 5 is excited. The storing part of the lighting circuit 6 is covered with a metal container, so as to prevent high-frequency electromagnetic field from leaking to the outside of a lamp. Further, an electrolytic capacitor 7 to be the part of the lighting circuit 6 is provided in the Edsion base 9. Between the capacitor 7 and the lighting circuit 6, a heat-insulating material 8 such as glass wool with low heat conductivity is arranged, and heat is prevented from being conducted to the electric field capacitor 7. Heat at the center part of the lighting circuit can be released with a material with superior heat conductivity, such as an aluminum plate to the outside of a case. Thus, degradation of the lamp due to a rise in heat of the electrolytic capacitor is suppressed, and its life time can be prolonged.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、放電容器内に電極
を持たない長寿命の照明用無電極蛍光ランプに関する。
特に、高周波電源を一体構成とした電球形無電極蛍光ラ
ンプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long-life electrodeless fluorescent lamp having no electrodes in a discharge vessel.
In particular, the present invention relates to a bulb-type electrodeless fluorescent lamp having an integrated high-frequency power supply.

【０００２】[0002]

【従来の技術】近年、長寿命形のランプとして無電極蛍
光ランプが検討されている。例えば、特開平7−192627
号公報などがある。無電極蛍光ランプは放電気体を封入
した放電容器に近接して配置した励起コイルに高周波電
流を流し、または、放電容器に近接して配置した一対の
対向電極に高周波電圧を印加し、発生する高周波電磁界
で放電容器内の放電気体を放電，発光させるものであ
る。上記高周波の周波数は数ＭＨzから数十ＭＨz程度で
ある。この無電極蛍光ランプは、放電容器内に電極を持
たないため、長寿命であることが特徴である。2. Description of the Related Art In recent years, electrodeless fluorescent lamps have been studied as long-life lamps. For example, JP-A-7-192627
No. Gazette. An electrodeless fluorescent lamp generates a high-frequency current by applying a high-frequency current to an excitation coil disposed close to a discharge vessel filled with a discharge gas or applying a high-frequency voltage to a pair of opposed electrodes disposed close to the discharge vessel. It discharges and emits a discharge gas in a discharge vessel by an electromagnetic field. The frequency of the high frequency is about several MHz to several tens MHz. This electrodeless fluorescent lamp has a feature that it has a long life because it has no electrode in the discharge vessel.

【０００３】一般の白熱電球の代替えとして、エジソン
ベースを用いた小型の電球形蛍光ランプの開発が行われ
ている。また、無電極蛍光ランプでもエジソンベースを
用いた高周波電源内蔵の小型形状のものの開発が行われ
ている。小型形状にすると放電容器の温度は上昇し、高
周波電源部の温度も上昇し、部品や特性の劣化が問題に
なる。この対策は各所で進められてきている。例えば、
特開昭60−117539号公報がある。また、高周波電源を別
置き形にしたり、高周波電源内部に放熱板を設けたりす
ることで対策を行っている。[0003] As a substitute for a general incandescent lamp, a compact compact fluorescent lamp using an Edison base has been developed. Also, a small-sized electrodeless fluorescent lamp with a built-in high-frequency power supply using an Edison base has been developed. If the size is reduced, the temperature of the discharge vessel rises, and the temperature of the high-frequency power supply also rises. This measure has been implemented in various places. For example,
There is JP-A-60-117539. In addition, countermeasures are taken by using a separate high-frequency power supply or providing a heat sink inside the high-frequency power supply.

【０００４】[0004]

【発明が解決しようとする課題】電球形無電極蛍光ラン
プでは、電極を有さないため放電容器の劣化は少ない
が、高周波電源部の、電解コンデンサの温度上昇による
部品劣化から寿命が決まっていた。本発明は、上記温度
上昇を抑え、より長寿命の電球形無電極蛍光ランプを提
供することを目的とする。In a bulb-type electrodeless fluorescent lamp, the discharge vessel has little deterioration because it has no electrodes, but its life is determined by the deterioration of parts of the high-frequency power supply due to the temperature rise of the electrolytic capacitor. . An object of the present invention is to provide a bulb-type electrodeless fluorescent lamp that suppresses the above temperature rise and has a longer life.

【０００５】[0005]

【課題を解決するための手段】高周波電力を供給するた
めの高周波電源とより成る一体構成の無電極蛍光ランプ
で、高周波電源に含まれ低温部に配置される電解コンデ
ンサの近傍の高温部側に、高温部側からの熱を上記電解
コンデンサに伝えないための断熱構造を設ける。An integrated electrodeless fluorescent lamp comprising a high-frequency power supply for supplying high-frequency power, which is included in the high-frequency power supply and located on the high-temperature side near the electrolytic capacitor disposed in the low-temperature section. A heat insulation structure is provided to prevent heat from the high temperature part from being transmitted to the electrolytic capacitor.

【０００６】[0006]

【発明の実施の形態】図１は、本発明の一実施例である
無電極蛍光ランプの断面図である。放電容器１は、通常
の蛍光ランプと同等のガラス容器からできている。外観
は略球形をしており、その底辺から内側に向かって円筒
状に伸びている部分２を有している。放電容器１の内部
には、アルゴン等の希ガスと水銀又はアマルガムが封入
されている。放電容器内側には、外側ガラス内面３に光
透過性の導電膜，蛍光体が塗布され、円筒状部分２に蛍
光体が塗布されている。光透過性の導電膜は、放電容器
から高周波電磁界がランプの外側に漏れる量を減少させ
るように構成されている。導電膜は、酸化スズ膜または
ＩＴＯ膜などでできている。FIG. 1 is a sectional view of an electrodeless fluorescent lamp according to an embodiment of the present invention. The discharge vessel 1 is made of a glass vessel equivalent to a normal fluorescent lamp. The appearance is substantially spherical, and has a portion 2 that extends cylindrically from the bottom side toward the inside. A rare gas such as argon and mercury or amalgam are sealed inside the discharge vessel 1. A light-transmitting conductive film and a fluorescent material are applied to the inner surface 3 of the outer glass, and the fluorescent material is applied to the cylindrical portion 2 inside the discharge vessel. The light transmissive conductive film is configured to reduce the amount of the high frequency electromagnetic field leaking out of the lamp from the discharge vessel. The conductive film is made of a tin oxide film, an ITO film, or the like.

【０００７】放電容器１の下部には、商用電源に接続す
るためのエジソンベース９が設けられ、ここから円筒状
部分２の下部にかけて点灯回路６が設置されている。点
灯回路６の収容部分は高周波電磁界がランプ外側に漏れ
ないように金属容器で覆われている。点灯回路６は商用
電源から数ＭＨｚの高周波を発生し、その高周波出力は
円筒状部分の中へ設けられた励起コイル４に接続されて
いる。励起コイル４は円筒状のフェライト５の周りに巻
かれ、例えばテフロン被覆が施された線である。[0007] An Edison base 9 for connecting to a commercial power supply is provided at a lower portion of the discharge vessel 1, and a lighting circuit 6 is provided from the Edison base 9 to a lower portion of the cylindrical portion 2. The housing portion of the lighting circuit 6 is covered with a metal container so that the high-frequency electromagnetic field does not leak outside the lamp. The lighting circuit 6 generates a high frequency of several MHz from a commercial power supply, and the high frequency output is connected to the excitation coil 4 provided in the cylindrical portion. The excitation coil 4 is a wire wound around a cylindrical ferrite 5 and coated with, for example, Teflon.

【０００８】点灯回路６の一部である電解コンデンサ７
は、エジソンベース９の内側に設けられ、点灯回路６と
電解コンデンサ７との間には断熱材８を設けることで、
点灯回路６側からの熱を電解コンデンサ７に伝えないよ
うにする。断熱材８は、熱伝導率の低い物質で構成され
る。またガラスウール等を用いることもできる。さら
に、点灯回路６が樹脂製のケースで囲まれている場合、
このケースを断熱材８の位置まで囲むようにして断熱構
造とすることができる。The electrolytic capacitor 7 which is a part of the lighting circuit 6
Is provided inside the Edison base 9, and by providing a heat insulating material 8 between the lighting circuit 6 and the electrolytic capacitor 7,
The heat from the lighting circuit 6 is not transmitted to the electrolytic capacitor 7. The heat insulating material 8 is made of a material having a low thermal conductivity. Further, glass wool or the like can be used. Further, when the lighting circuit 6 is surrounded by a resin case,
A heat insulating structure can be formed by surrounding this case to the position of the heat insulating material 8.

【０００９】実施例は一例であり、例えば図２の実施例
では、図１の実施例の断熱材８を中空の板１０にするこ
とでも同等の効果が得られる。The embodiment is merely an example. For example, in the embodiment of FIG. 2, the same effect can be obtained by replacing the heat insulating material 8 of the embodiment of FIG. 1 with a hollow plate 10.

【００１０】高温部側からの断熱効果を上げるために、
断熱構造のさらに高温部側に、例えばアルミニウム板な
どの熱伝導性の良い物質で、回路中央部の熱をケース等
の周辺部に逃がすようにした構造とすることもできる。In order to increase the heat insulating effect from the high temperature part side,
Further, on the high-temperature portion side of the heat insulating structure, a structure in which heat of a central portion of the circuit is released to a peripheral portion such as a case by using a material having good thermal conductivity such as an aluminum plate may be employed.

【００１１】[0011]

【発明の効果】本発明によれば、高周波電源に含まれ低
温部に配置される電解コンデンサの近傍の高温部側に、
断熱材を設けることにより、高温部側からの熱が電解コ
ンデンサに伝わらなくなり、電解コンデンサの劣化を抑
え、より長寿命とすることができる。According to the present invention, the high-temperature part near the electrolytic capacitor included in the high-frequency power supply and arranged in the low-temperature part has:
By providing the heat insulating material, the heat from the high-temperature portion side is not transmitted to the electrolytic capacitor, so that the deterioration of the electrolytic capacitor can be suppressed and the life can be further extended.

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

【図１】本発明の一実施例の無電極放電灯の断面図。FIG. 1 is a sectional view of an electrodeless discharge lamp according to an embodiment of the present invention.

【図２】本発明の他の実施例の無電極放電灯の断面図。FIG. 2 is a sectional view of an electrodeless discharge lamp according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１…放電容器、２…円筒状部分、３…放電容器の外側ガ
ラス部分、４…励起コイル、５…フェライトコア、６…
点灯回路、７…電界コンデンサ、８…断熱材、９…エジ
ソンベース口金、１０…中空の板。DESCRIPTION OF SYMBOLS 1 ... Discharge container, 2 ... cylindrical part, 3 ... outer glass part of discharge container, 4 ... excitation coil, 5 ... ferrite core, 6 ...
Lighting circuit, 7: electric capacitor, 8: heat insulating material, 9: Edison base base, 10: hollow plate.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹清 敦 東京都青梅市藤橋888番地 株式会社日立 製作所熱器ライティング事業部内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Takekiyo 888 Fujibashi, Ome-shi, Tokyo Heating Lighting Division, Hitachi, Ltd.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】内部に発光物質と励起し得るガス充填物を
設けた放電容器と、上記放電容器に密接して放電させる
ための高周波電磁界を発生させるコイルと、高周波電力
を供給するための高周波電源とより成る一体構成の無電
極蛍光ランプにおいて、上記高周波電源に含まれ低温部
に配置される電解コンデンサの近傍の高温部側に、上記
高温部側からの熱を上記電解コンデンサに伝えないため
の断熱構造を設けたことを特徴とする無電極蛍光ラン
プ。A discharge vessel provided with a gas filling capable of being excited by a luminescent substance therein; a coil for generating a high-frequency electromagnetic field for discharging closely to the discharge vessel; and a coil for supplying high-frequency power. In an integrated electrodeless fluorescent lamp including a high-frequency power supply, heat from the high-temperature part is not transmitted to the high-temperature part near the electrolytic capacitor included in the high-frequency power supply and arranged in the low-temperature part. Electrodeless fluorescent lamp provided with a heat insulating structure for the electrode. 【請求項２】請求項１において、上記高温部からの熱を
上記電解コンデンサに伝えないための手段として、複数
の断熱構造を設ける無電極蛍光ランプ。2. The electrodeless fluorescent lamp according to claim 1, wherein a plurality of heat insulating structures are provided as means for preventing heat from said high-temperature portion from being transmitted to said electrolytic capacitor. 【請求項３】請求項１又は２において、上記電解コンデ
ンサを口金部に近接して設置した無電極蛍光ランプ。3. The electrodeless fluorescent lamp according to claim 1, wherein said electrolytic capacitor is installed close to a base. 【請求項４】請求項１，２または３において、回路部を
覆う樹脂製ケースを有し、上記断熱構造として上記樹脂
製ケースの一部が兼用している無電極蛍光ランプ。4. The electrodeless fluorescent lamp according to claim 1, further comprising a resin case for covering the circuit portion, wherein a part of the resin case also serves as the heat insulating structure.