JP3728796B2 - Lighting equipment - Google Patents

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Publication number
JP3728796B2
JP3728796B2 JP10059096A JP10059096A JP3728796B2 JP 3728796 B2 JP3728796 B2 JP 3728796B2 JP 10059096 A JP10059096 A JP 10059096A JP 10059096 A JP10059096 A JP 10059096A JP 3728796 B2 JP3728796 B2 JP 3728796B2
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Prior art keywords
power supply
lighting
lighting device
detection circuit
fuse
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JP10059096A
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JPH09289092A (en
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弘之 松本
一行 松川
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Circuit Arrangements For Discharge Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Description

【０００１】
【発明の属する利用分野】
本発明は照明装置に関するものであり、更に詳しくは、交流電源通電時及び遮断時共用のインバータ回路で照明負荷を点灯させる照明装置に関する。
【０００２】
【従来の技術】
本発明に係る第１従来例の回路図を図４に示す。
【０００３】
本回路は、交流電源Ｖａｃの２つの電源線と、例えば壁スイッチＳＷ１などのオンオフにより、交流電源Ｖａｃの通電時（以下、平常時と呼ぶ。）に照明負荷の点灯と不点灯とを切り換える為の１線とを接続する３線方式を有し、平常時及び交流電源Ｖａｃの遮断時（以下、非常時と呼ぶ。）を１つのインバータ回路で共用で照明負荷を高周波点灯させる照明装置であり、交流電源Ｖａｃと、交流電源Ｖａｃに直列接続された壁スイッチＳＷ１と、照明負荷の非常点灯の点検の為の点検スイッチＳＷ２と、壁スイッチＳＷ１と点検スイッチＳＷ２とを介して交流電源Ｖａｃの両端に並列接続され、照明負荷Ｌａを平常時点灯させる安定器７と、点検スイッチＳＷ２を介して交流電源Ｖａｃの両端に並列接続され、照明負荷Ｌａを非常時点灯させる非常点灯ブロック８とから構成される。なお、照明負荷Ｌａには放電灯Ｌａを用いている。
【０００４】
非常点灯ブロック８は、点検スイッチＳＷ２を介して交流電源電圧Ｖａｃを電力変換して直流電圧を出力するＡＣ／ＤＣコンバータ５と、ＡＣ／ＤＣコンバータ５の直流電圧出力を交流の高周波電圧に変換して放電灯Ｌａに供給するインバータ回路ＩＮＶと、非常時にインバータ回路ＩＮＶに直流電圧を供給する二次電池Ｖｏと、ＡＣ／ＤＣコンバータ５により二次電池Ｖｏを充電する為の充電回路部３と、ＡＣ／ＤＣコンバータ５の直流電圧出力及び二次電池Ｖｏの直流電圧出力を切り替えてインバータ回路ＩＮＶに接続する為の切替回路部６とから構成される。また、安定器７の出力とインバータ回路ＩＮＶの出力とを切り替えて放電灯Ｌａに接続する切替部４を設けている。更に、点検スイッチＳＷ２は、交流電源Ｖａｃから安定器７及び非常点灯ブロック８への交流電源電圧の供給を遮断できる位置に設けられている。
【０００５】
次に動作を簡単に説明する。
平常時は、壁スイッチＳＷ１をオンすると、交流電源Ｖａｃから壁スイッチＳＷ１と点検スイッチＳＷ２と安定器７と切替部４とを介して放電灯Ｌａを高周波点灯させると共に、交流電源Ｖａｃから点検スイッチＳＷ２とＡＣ／ＤＣコンバータ５と充電回路部３と切替回路部６とを介して二次電池Ｖｏを充電する。また、壁スイッチＳＷ１をオフすると、交流電源Ｖａｃから安定器７への交流電源電圧の供給が遮断されるので放電灯Ｌａは消灯すると共に、交流電源Ｖａｃから点検スイッチＳＷ２とＡＣ／ＤＣコンバータ５と充電回路部３と切替回路部６とを介して二次電池Ｖｏを充電する。非常時は、交流電源Ｖａｃが遮断されるので、安定器７への交流電源電圧の供給が遮断されるので、二次電池Ｖｏがインバータ回路ＩＮＶの電源となってインバータ回路ＩＮＶを発振動作させて放電灯Ｌａを高周波で非常点灯させる。
【０００６】
上述の様な構成を有する照明装置を多灯用とした場合、複数の安定器７と非常点灯ブロック８とが必要となるが、点検スイッチＳＷ２を介して互いの安定器７及び非常点灯ブロック８への電流の廻り込み現象を解決するものとして、特公昭５６−１６５１６号公報と、特公昭５６−４７６７８号公報とに示したものがある。
【０００７】
本発明に係る第２従来例の回路図を図５に示す。
本回路は、交流電源Ｖａｃの２つの電源線と、例えば壁スイッチＳＷ１などのオンオフにより平常時に照明負荷の点灯と不点灯とを切り換える為の１線とを接続する３線方式を有し、平常時及び非常時共用で複数の照明負荷を高周波点灯させる照明装置であり、交流電源Ｖａｃと、交流電源Ｖａｃに直列接続された壁スイッチＳＷ１と、交流電源Ｖａｃの両端に並列接続された複数の点灯装置Ａ１〜Ａｎ（ｎは正の整数）と、壁スイッチＳＷ１のオンオフを検出する３線検出回路１１〜１ｎとから構成され、各々の点灯装置Ａ１〜Ａｎの照明負荷には放電灯Ｌａ１〜Ｌａｎを用いている。なお、３線検出回路１１〜１ｎは、例えばフォトカプラを用いたものがある。また、図５には点灯装置Ａ１，Ａ２だけを図示している。
【０００８】
点灯装置Ａ１は、異常時に交流電源Ｖａｃからの電源電圧の供給を遮断することにより３線検出回路１１及び点灯装置Ａ１を保護するヒューズＦ１と、ヒューズＦ１を介して交流電源電圧Ｖａｃを整流する整流器ＤＢ１と、整流器ＤＢ１の出力電圧を電力変換して直流電圧を出力するＤＣ／ＤＣコンバータ２１と、ＤＣ／ＤＣコンバータ２１の直流電圧出力を交流の高周波電圧に変換して放電灯Ｌａ１に供給するインバータ回路ＩＮＶ１と、非常時にインバータ回路ＩＮＶ１に直流電圧を供給する二次電池Ｖ１と、ＤＣ／ＤＣコンバータ２１により二次電池Ｖ１を充電する為の充電回路３１と、ＤＣ／ＤＣコンバータ２１の直流電圧出力及び二次電池Ｖ１の直流電圧出力を切り替えてインバータ回路ＩＮＶ１に接続する為の切替回路４１と、３線検出回路１１からの検出信号を受けてインバータ回路ＩＮＶ１の発振動作を制御する制御部６１とから構成される。なお、点灯装置Ａ２〜Ａｎも点灯装置Ａ１と同様の構成であるので説明は省略する。
【０００９】
次に動作を簡単に説明する。
平常時は、壁スイッチＳＷ１をオンすると、３線検出回路１１で壁スイッチＳＷ１のオンを検知してインバータ回路ＩＮＶ１を発振動作させて放電灯Ｌａ１を点灯させると共に、交流電源Ｖａｃから整流器ＤＢ１とＤＣ／ＤＣコンバータ２１と充電回路３１とを介して二次電池Ｖ１を充電する。壁スイッチＳＷ１をオフすると、３線検出回路１１で壁スイッチＳＷ１のオフを検知してインバータ回路ＩＮＶ１を発振停止するなどして放電灯Ｌａ１を消灯させると共に、交流電源Ｖａｃから整流器ＤＢ１とＤＣ／ＤＣコンバータ２１と充電回路３１とを介して二次電池Ｖ１を充電する。非常時は、交流電源Ｖａｃが遮断されるので、交流電源Ｖａｃからインバータ回路ＩＮＶ１への電源電圧の供給が遮断され、二次電池Ｖ１がインバータ回路ＩＮＶの電源となってインバータ回路ＩＮＶ１を発振動作させて放電灯Ｌａを高周波で非常点灯させる。
【００１０】
【発明が解決しようとする課題】
しかし、上記従来例においては、ヒューズＦ１を３線検出回路１１の一端及び交流電源Ｖａｃの一端の接点よりも交流電源Ｖａｃ側に設けているので、平常時且つ壁スイッチＳＷ１のオフ時にヒューズＦ１が断線しても、図４に示す矢印の様に、交流電源Ｖａｃ→ヒューズＦ２→３線検出回路１２→３線検出回路１１→整流器ＤＢ１→交流電源Ｖａｃの経路により３線検出回路１１に電流が流れ、３線検出回路１１では壁スイッチＳＷ１がオンしている様な検知をしてしまい、ヒューズＦ１の断線により交流電源Ｖａｃからの電源電圧の供給が遮断されているにもかかわらず、上述の様に制御部６１を介してインバータ回路ＩＮＶ１を発振動作させて放電灯Ｌａ１を点灯させてしまう、という廻り込み現象の問題点が生じてしまう。
【００１１】
本発明は上記問題点に鑑みてなされたもので、その目的とするところは、３線式を有し、廻り込み現象による誤動作を防止可能な照明装置を提供することである。
【００１２】
【課題を解決するための手段】
上記問題点を解決するために、請求項１記載の発明によれば、交流電源の２つの電源線と、前記交流電源の２つの電源線に接続され照明負荷を点灯させる複数の点灯装置と、スイッチを介して前記交流電源に接続される１線と、前記交流電源の１つの電源線と前記１線との間に接続され前記スイッチのオンオフを検出して前記点灯装置の出力を制御する３線検出回路と、を備える３線方式の照明装置において、前記交流電源と前記点灯装置との接続を遮断する第１のヒューズを、前記交流電源の１つの電源線及び前記３線検出回路の接続点と前記点灯装置との間に設けたことを特徴とする。
【００１３】
請求項２記載の発明によれば、前記３線検出回路と、前記交流電源の１つの電源線及び前記３線検出回路の接続点と、の間に、さらに第２のヒューズを設けたことを特徴とする。
【００１４】
請求項３記載の発明によれば、前記点灯装置は、少なくとも整流器と、前記整流器の後段に接続されるコンバータと、を備え、前記第１のヒューズを、前記交流電源の１つの電源線及び前記３線検出回路の接続点と前記点灯装置との間に設けることに代えて、前記整流器と前記コンバータとの間に設け、さらに、前記照明負荷の非常点灯点検を確認する為の点検スイッチを前記第１のヒューズと直列に設けたことを特徴とする。
【００１７】
請求項４記載の発明によれば、照明負荷は放電灯であることを特徴とする。
【００１８】
【実施の形態】
（実施の形態１）
本発明に係る第１の実施の形態に係る回路図を図１に示す。
【００１９】
図５に示す従来例と異なる点は、ヒューズＦ１の代わりに、交流電源Ｖａｃ及び３線検出回路１１の入力端の接点ｂ点と整流器ＤＢ１の入力端との間に第１ヒューズ（以下、ヒューズと呼ぶ。）Ｆ１１を新たに設けて、異常時に交流電源Ｖａｃと点灯装置Ａ１とを遮断することにより、点灯装置Ａ１を保護する様に構成したことであり、その他の従来例と同一構成には同一符号を付すことにより説明を省略する。なお、点灯装置Ａ２〜Ａｎも点灯装置Ａ１と同様の構成を有しているので説明は省略する。
【００２０】
（実施の形態２）
本発明に係る第２の実施の形態の回路図を図２に示す。
【００２１】
図１に示した第１の実施の形態と異なる点は、ｂ点と３線検出回路１１の入力端との間に第２ヒューズＦ２１（以下、ヒューズと呼ぶ。）を新たに設けて、異常時に交流電源Ｖａｃと３線検出回路１１とを遮断することにより、３線検出回路１１を保護する様に構成したことであり、その他の第１の実施の形態と同一構成には同一符号を付すことにより説明を省略する。なお、点灯装置Ａ２〜Ａｎも点灯装置Ａ１と同様の構成を有しているので説明は省略する。
【００２２】
（実施の形態３）
本発明に係る第３の実施の形態の回路図を図３に示す。
【００２３】
図１に示した第１の実施の形態と異なる点は、整流器ＤＢ１の出力端とＤＣ／ＤＣコンバータ２１の入力端との間に、ヒューズＦ１１と放電灯Ｌａ１の非常点灯点検の為の点検スイッチＳＷ２１との直列回路を設けたことであり、その他の第１の実施の形態と同一構成には同一符号を付すことにより説明を省略する。なお、ヒューズＦ１１と点検スイッチＳＷ２１とを一体形成してもよく、一体形成することにより装置の更なる小型化が可能となる。また、点灯装置Ａ２〜Ａｎも点灯装置Ａ１と同様の構成を有しているので説明は省略する。
【００２４】
上記全ての実施の形態においては、ヒューズＦ１１〜Ｆ１ｎを、交流電源Ｖａｃ及び３線検出回路１１〜１ｎの入力端の接点ｂ点よりも負荷側に設けたので、ヒューズ断線時には確実に交流電源Ｖａｃからインバータ回路ＩＮＶ１〜ＩＮＶｎへの電圧供給を遮断でき、壁スイッチＳＷ１オフ時の点灯装置Ａ１〜Ａｎの誤動作を防止可能、つまり廻り込み現象による放電灯Ｌａ１〜Ｌａｎの誤点灯を防止できる。なお、ヒューズＦ１１〜Ｆ１ｎは、交流電源Ｖａｃ及び３線検出回路１１〜１ｎの入力端の接点ｂ点よりも負荷側に設けたので、ヒューズ断線時には確実に交流電源Ｖａｃからインバータ回路ＩＮＶ１〜ＩＮＶｎへの電圧供給を遮断できる構成であれば何でもよく、ＤＣ／ＤＣコンバータ２１〜２ｎは降圧コンバータでも昇圧コンバータでも何でもよく、インバータ回路ＩＮＶ１〜ＩＮＶｎはどの様な構成を用いてもよく、照明負荷としては放電灯を用いたが、他の種類の光源を用いてもよい。
【００２５】
【発明の効果】
請求項１記載の発明によれば、３線式を有し、廻り込み現象による誤動作を防止可能であると共に、異常時に交流電源と点灯装置とを遮断することにより点灯装置を保護することが可能な照明装置を提供できる。
【００２６】
請求項２記載の発明によれば、３線式を有し、廻り込み現象による誤動作を防止可能であると共に、異常時に交流電源と３線検出回路とを遮断することにより３線検出回路を保護することが可能な照明装置を提供できる。
【００２７】
請求項３に記載の発明によれば、３線式を有し、廻り込み現象による誤動作を防止可能であると共に、点検スイッチを操作することにより照明負荷の非常点灯を確認することが可能な照明装置を提供できる。
【００２９】
請求項４記載の発明によれば、３線式を有し、廻り込み現象による誤動作を防止可能な照明装置を提供できる。
【図面の簡単な説明】
【図１】本発明に係る第１の実施の形態の回路図を示す。
【図２】本発明に係る第２の実施の形態の回路図を示す。
【図３】本発明に係る第３の実施の形態の回路図を示す。
【図４】本発明に係る第１従来例の回路図を示す。
【図５】本発明に係る第２従来例の回路図を示す。
【符号の説明】
Ｆ ヒューズ
ＩＮＶ インバータ回路
Ｌａ 照明負荷
Ｖａｃ 交流電源
Ｖ１ 二次電池
ＳＷ スイッチ
１ｎ ３線検出回路[0001]
FIELD OF THE INVENTION
The present invention relates to a lighting device, and more particularly, to a lighting device in which a lighting load is turned on by an inverter circuit that is commonly used when an AC power supply is turned on and off.
[0002]
[Prior art]
FIG. 4 shows a circuit diagram of a first conventional example according to the present invention.
[0003]
This circuit switches on and off the lighting load when the AC power supply Vac is energized (hereinafter referred to as normal) by turning on and off the two power supply lines of the AC power supply Vac and, for example, the wall switch SW1. Is a lighting device that uses a single inverter circuit to share the lighting load at high frequency during normal times and when the AC power supply Vac is shut off (hereinafter referred to as an emergency). , An AC power supply Vac, a wall switch SW1 connected in series to the AC power supply Vac, an inspection switch SW2 for checking the emergency lighting of the lighting load, and both ends of the AC power supply Vac via the wall switch SW1 and the inspection switch SW2. And a ballast 7 that normally turns on the lighting load La, and is connected in parallel to both ends of the AC power supply Vac via the check switch SW2 to turn on the lighting load La in an emergency. That consists of very lit block 8. A discharge lamp La is used as the illumination load La.
[0004]
The emergency lighting block 8 converts the AC power supply voltage Vac through the inspection switch SW2 to output a DC voltage, and converts the DC voltage output of the AC / DC converter 5 into an AC high frequency voltage. An inverter circuit INV for supplying a discharge lamp La to the inverter circuit INV, a secondary battery Vo for supplying a DC voltage to the inverter circuit INV in an emergency, and a charging circuit unit 3 for charging the secondary battery Vo with an AC / DC converter 5; And a switching circuit section 6 for switching between the DC voltage output of the AC / DC converter 5 and the DC voltage output of the secondary battery Vo and connecting to the inverter circuit INV. Further, a switching unit 4 for switching between the output of the ballast 7 and the output of the inverter circuit INV and connecting to the discharge lamp La is provided. Further, the inspection switch SW2 is provided at a position where the supply of the AC power supply voltage from the AC power supply Vac to the ballast 7 and the emergency lighting block 8 can be cut off.
[0005]
Next, the operation will be briefly described.
In normal times, when the wall switch SW1 is turned on, the discharge lamp La is turned on at a high frequency from the AC power supply Vac via the wall switch SW1, the inspection switch SW2, the ballast 7, and the switching unit 4, and the inspection switch SW2 is switched from the AC power supply Vac. The secondary battery Vo is charged via the AC / DC converter 5, the charging circuit 3, and the switching circuit 6. Further, when the wall switch SW1 is turned off, the supply of the AC power supply voltage from the AC power supply Vac to the ballast 7 is cut off, so that the discharge lamp La is turned off and the inspection switch SW2 and the AC / DC converter 5 are switched from the AC power supply Vac. The secondary battery Vo is charged via the charging circuit unit 3 and the switching circuit unit 6. In an emergency, the AC power supply Vac is cut off, so that the supply of the AC power supply voltage to the ballast 7 is cut off. Therefore, the secondary battery Vo becomes the power supply of the inverter circuit INV and oscillates the inverter circuit INV. The discharge lamp La is turned on at high frequency.
[0006]
When the lighting device having the above-described configuration is used for multiple lamps, a plurality of ballasts 7 and an emergency lighting block 8 are required. However, each ballast 7 and the emergency lighting block 8 are connected via the inspection switch SW2. Japanese Patent Publication No. Sho 56-16516 and Japanese Patent Publication No. Sho 56-47678 disclose a method of solving the phenomenon of the current sneak into the device.
[0007]
A circuit diagram of a second conventional example according to the present invention is shown in FIG.
This circuit has a three-wire system in which two power lines of an AC power supply Vac are connected to one line for switching between lighting and non-lighting of a lighting load in a normal state by turning on and off a wall switch SW1, for example. This is a lighting device for high frequency lighting of a plurality of lighting loads for both time and emergency use, and includes an AC power supply Vac, a wall switch SW1 connected in series to the AC power supply Vac, and a plurality of lightings connected in parallel to both ends of the AC power supply Vac. Each of the lighting devices A1 to An (n is a positive integer) and three-wire detection circuits 11 to 1n for detecting the on / off state of the wall switch SW1 is provided with a discharge lamp La1 to Lan. Is used. Some of the three-wire detection circuits 11 to 1n use, for example, a photocoupler. FIG. 5 shows only the lighting devices A1 and A2.
[0008]
The lighting device A1 includes a fuse F1 that protects the three-wire detection circuit 11 and the lighting device A1 by interrupting supply of a power supply voltage from the AC power supply Vac when an abnormality occurs, and a rectifier that rectifies the AC power supply voltage Vac via the fuse F1. DB1, DC / DC converter 21 that converts the output voltage of rectifier DB1 to output a DC voltage, and an inverter that converts the DC voltage output of DC / DC converter 21 to an AC high-frequency voltage and supplies it to discharge lamp La1 A circuit INV1, a secondary battery V1 for supplying a DC voltage to the inverter circuit INV1 in an emergency, a charging circuit 31 for charging the secondary battery V1 by the DC / DC converter 21, and a DC voltage output of the DC / DC converter 21 A switching circuit 41 for switching the DC voltage output of the secondary battery V1 to connect to the inverter circuit INV1; And a control unit 61 which controls the oscillation of the inverter circuit INV1 receives the detection signal from the line detection circuit 11. Since the lighting devices A2 to An have the same configuration as the lighting device A1, the description is omitted.
[0009]
Next, the operation will be briefly described.
In normal times, when the wall switch SW1 is turned on, the three-wire detection circuit 11 detects that the wall switch SW1 is turned on, oscillates the inverter circuit INV1, turns on the discharge lamp La1, and switches the rectifier DB1 and DC from the AC power supply Vac. The secondary battery V1 is charged via the / DC converter 21 and the charging circuit 31. When the wall switch SW1 is turned off, the discharge lamp La1 is turned off by, for example, stopping the oscillation of the inverter circuit INV1 by detecting the off of the wall switch SW1 by the three-wire detection circuit 11, and rectifier DB1 and DC / DC from the AC power supply Vac. The secondary battery V1 is charged through the converter 21 and the charging circuit 31. In an emergency, the AC power supply Vac is cut off, so that the supply of power supply voltage from the AC power supply Vac to the inverter circuit INV1 is cut off, and the secondary battery V1 becomes the power supply of the inverter circuit INV to oscillate the inverter circuit INV1. The discharge lamp La is lit at high frequency.
[0010]
[Problems to be solved by the invention]
However, in the above conventional example, the fuse F1 is provided on the AC power supply Vac side with respect to the contact of one end of the three-wire detection circuit 11 and one end of the AC power supply Vac. Even if the wire is disconnected, as indicated by the arrow in FIG. 4, the current is supplied to the three-wire detection circuit 11 through the path of the AC power supply Vac → the fuse F2 → the three-wire detection circuit 12 → the three-wire detection circuit 11 → the rectifier DB1 → Although the three-line detection circuit 11 detects that the wall switch SW1 is turned on and the supply of the power supply voltage from the AC power supply Vac is interrupted by the disconnection of the fuse F1, the above-described operation is performed. As described above, there is a problem of the sneaking phenomenon that the discharge lamp La1 is turned on by oscillating the inverter circuit INV1 via the control unit 61.
[0011]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting device having a three-wire system and capable of preventing a malfunction due to a wraparound phenomenon.
[0012]
[Means for Solving the Problems]
In order to solve the above problem, according to the invention described in claim 1, two power supply lines of the AC power supply, and a plurality of lighting devices that are connected to the two power supply lines of the AC power supply and light the illumination load, A line connected to the AC power supply via a switch, and connected between one power supply line of the AC power supply and the one line to detect on / off of the switch and control an output of the lighting device; And a line detection circuit, wherein a first fuse that cuts off connection between the AC power supply and the lighting device is connected to one power supply line of the AC power supply and the three-wire detection circuit. It is provided between the point and the lighting device .
[0013]
According to the invention described in claim 2 , a second fuse is further provided between the three-wire detection circuit and a connection point between one power supply line of the AC power supply and the three-wire detection circuit. Features.
[0014]
According to a third aspect of the invention, the lighting device includes at least a rectifier and a converter connected to a subsequent stage of the rectifier, and the first fuse is connected to one power supply line of the AC power supply and the Instead of providing between the connection point of the three-wire detection circuit and the lighting device, the check switch is provided between the rectifier and the converter, and further includes an inspection switch for confirming an emergency lighting inspection of the lighting load. It is provided in series with the first fuse .
[0017]
According to a fourth aspect of the present invention, the lighting load is a discharge lamp.
[0018]
Embodiment
(Embodiment 1)
FIG. 1 shows a circuit diagram according to a first embodiment of the present invention.
[0019]
5 is different from the conventional example shown in FIG. 5 in that, instead of the fuse F1, a first fuse (hereinafter referred to as a fuse) is provided between the contact point b of the input terminal of the AC power supply Vac and the three-wire detection circuit 11 and the input terminal of the rectifier DB1. F11 is newly provided, and the AC power supply Vac and the lighting device A1 are cut off in the event of an abnormality to protect the lighting device A1, and the same configuration as the other conventional examples The description is omitted by giving the same reference numerals. Note that the lighting devices A2 to An also have the same configuration as the lighting device A1, and a description thereof will be omitted.
[0020]
(Embodiment 2)
A circuit diagram of a second embodiment according to the present invention is shown in FIG.
[0021]
1 is different from the first embodiment shown in FIG. 1 in that a second fuse F21 (hereinafter referred to as a fuse) is newly provided between the point b and the input end of the three-line detection circuit 11, and an abnormality occurs. Sometimes, the AC power supply Vac and the three-wire detection circuit 11 are cut off to protect the three-wire detection circuit 11, and the same components as those of the first embodiment are denoted by the same reference numerals. Thus, the description is omitted. Note that the lighting devices A2 to An also have the same configuration as the lighting device A1, and a description thereof will be omitted.
[0022]
(Embodiment 3)
A circuit diagram of a third embodiment according to the present invention is shown in FIG.
[0023]
The difference from the first embodiment shown in FIG. 1 is that a check switch for checking the emergency lighting of the fuse F11 and the discharge lamp La1 is provided between the output terminal of the rectifier DB1 and the input terminal of the DC / DC converter 21. This is because a series circuit with the SW 21 is provided, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. Note that the fuse F11 and the inspection switch SW21 may be formed integrally, and by forming them integrally, the size of the apparatus can be further reduced. Further, the lighting devices A2 to An also have the same configuration as the lighting device A1, and a description thereof will be omitted.
[0024]
In all of the above-described embodiments, the fuses F11 to F1n are provided on the load side of the AC power supply Vac and the point of contact b at the input terminals of the three-wire detection circuits 11 to 1n. , The voltage supply to the inverter circuits INV1 to INVn can be cut off, and malfunctions of the lighting devices A1 to An when the wall switch SW1 is turned off can be prevented, that is, erroneous lighting of the discharge lamps La1 to Lan due to the sneaking phenomenon can be prevented. Since the fuses F11 to F1n are provided on the load side with respect to the contact point b of the input terminals of the AC power supply Vac and the three-wire detection circuits 11 to 1n, when the fuse is disconnected, the AC power supply Vac is reliably connected to the inverter circuits INV1 to INVn. The DC / DC converters 21 to 2n may be any step-down converters or step-up converters, and any configuration may be used for the inverter circuits INV1 to INVn. Although a discharge lamp is used, other types of light sources may be used.
[0025]
【The invention's effect】
According to the first aspect of the present invention, it has a three-wire system, can prevent malfunction due to the wraparound phenomenon, and can protect the lighting device by shutting off the AC power source and the lighting device in the event of an abnormality. Lighting device can be provided.
[0026]
According to the second aspect of the present invention, it has a three-wire system and can prevent malfunction due to a wraparound phenomenon, and protects the three-wire detection circuit by shutting off the AC power supply and the three-wire detection circuit in the event of an abnormality. And a lighting device capable of performing such operations.
[0027]
According to the invention described in claim 3, comprising a 3-wire, as well as a possible prevent malfunction due to sneak phenomenon, which can be confirmed very lighting of the lighting load by operating the test switch illumination Equipment can be provided.
[0029]
According to the fourth aspect of the present invention, it is possible to provide a lighting device that has a three-wire system and can prevent malfunction due to a wraparound phenomenon.
[Brief description of the drawings]
FIG. 1 shows a circuit diagram of a first embodiment according to the present invention.
FIG. 2 shows a circuit diagram of a second embodiment according to the present invention.
FIG. 3 shows a circuit diagram of a third embodiment according to the present invention.
FIG. 4 shows a circuit diagram of a first conventional example according to the present invention.
FIG. 5 shows a circuit diagram of a second conventional example according to the present invention.
[Explanation of symbols]
F Fuse INV Inverter circuit La Lighting load Vac AC power supply V1 Secondary battery SW switch 1n 3-wire detection circuit

Claims (4)

交流電源の２つの電源線と、前記交流電源の２つの電源線に接続され照明負荷を点灯させる複数の点灯装置と、スイッチを介して前記交流電源に接続される１線と、前記交流電源の１つの電源線と前記１線との間に接続され前記スイッチのオンオフを検出して前記点灯装置の出力を制御する３線検出回路と、を備える３線方式の照明装置において、前記交流電源と前記点灯装置との接続を遮断する第１のヒューズを、前記交流電源の１つの電源線及び前記３線検出回路の接続点と前記点灯装置との間に設けたことを特徴とする照明装置。 Two power supply lines of an AC power supply, a plurality of lighting devices connected to the two power supply lines of the AC power supply to light a lighting load, one line connected to the AC power supply via a switch, and the AC power supply A three-wire detection circuit that is connected between one power supply line and the one wire and that detects on / off of the switch and controls an output of the lighting device; The lighting device according to claim 1, wherein a first fuse for interrupting connection with the lighting device is provided between a connection point of one power supply line of the AC power supply and the three-wire detection circuit and the lighting device. 前記３線検出回路と、前記交流電源の１つの電源線及び前記３線検出回路の接続点と、の間に、さらに第２のヒューズを設けたことを特徴とする請求項１記載の照明装置。The lighting device according to claim 1, wherein a second fuse is further provided between the three-wire detection circuit and a connection point between one power supply line of the AC power supply and the three-wire detection circuit. . 前記点灯装置は、少なくとも整流器と、前記整流器の後段に接続されるコンバータと、を備え、前記第１のヒューズを、前記交流電源の１つの電源線及び前記３線検出回路の接続点と前記点灯装置との間に設けることに代えて、前記整流器と前記コンバータとの間に設け、さらに、前記照明負荷の非常点灯点検を確認する為の点検スイッチを前記第１のヒューズと直列に設けたことを特徴とする請求項１記載の照明装置。 The lighting device includes at least a rectifier and a converter connected to a stage subsequent to the rectifier, and connects the first fuse to a connection point between one power supply line of the AC power supply and the three-wire detection circuit. Instead of providing between the rectifier and the converter, an inspection switch for confirming an emergency lighting inspection of the lighting load is provided in series with the first fuse. The lighting device according to claim 1. 前記照明負荷は放電灯であることを特徴とする請求項１から請求項３のいずれかに記載の照明装置。The lighting device according to any one of claims 1 to 3 , wherein the lighting load is a discharge lamp .
JP10059096A 1996-04-23 1996-04-23 Lighting equipment Expired - Fee Related JP3728796B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10059096A JP3728796B2 (en) 1996-04-23 1996-04-23 Lighting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10059096A JP3728796B2 (en) 1996-04-23 1996-04-23 Lighting equipment

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JPH09289092A JPH09289092A (en) 1997-11-04
JP3728796B2 true JP3728796B2 (en) 2005-12-21

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Publication number Priority date Publication date Assignee Title
JP2009163962A (en) * 2007-12-28 2009-07-23 Panasonic Electric Works Co Ltd Emergency lighting system
JP5214544B2 (en) * 2009-06-19 2013-06-19 株式会社日立製作所 Break detector added to train detector for three-wire track circuit using digital telegram
US8274227B2 (en) * 2010-05-06 2012-09-25 Nextek Power Systems, Inc. High-efficiency DC ballast arrangement with automatic polarity protection and emergency back-up for lighting fixture in a suspended DC-powered ceiling system

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