JPH10116692A - Discharge lamp lighting device for showcase - Google Patents

Discharge lamp lighting device for showcase

Info

Publication number
JPH10116692A
JPH10116692A JP30543096A JP30543096A JPH10116692A JP H10116692 A JPH10116692 A JP H10116692A JP 30543096 A JP30543096 A JP 30543096A JP 30543096 A JP30543096 A JP 30543096A JP H10116692 A JPH10116692 A JP H10116692A
Authority
JP
Japan
Prior art keywords
power supply
high frequency
inverter
voltage
showcase
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
JP30543096A
Other languages
Japanese (ja)
Inventor
Wataru Kitade
亘 北出
Yasuhisa Nomura
泰久 野村
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.)
Tozai Denko Co Ltd
Original Assignee
Tozai Denko Co Ltd
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 Tozai Denko Co Ltd filed Critical Tozai Denko Co Ltd
Priority to JP30543096A priority Critical patent/JPH10116692A/en
Publication of JPH10116692A publication Critical patent/JPH10116692A/en
Pending legal-status Critical Current

Links

Landscapes

  • Freezers Or Refrigerated Showcases (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce high frequency noises produced when a glow start type choke is replaced with a high frequency inverter using an existing wiring by installing a noise filter device between a power supply and the inverter. SOLUTION: When a power supply is put on, commercial AC is turned into DC voltage by a DC converter circuit in a high frequency inverter circuit, and with this voltage, an oscillator circuit is actuated to generate a high frequency voltage which is impressed on a fluorescent lamp. A high voltage is impressed on the lamp by resonance of the output transformer of the inverter circuit with a capacitor for preheating, and the lamp is lighted up. A noise filter device 6 is installed between the power supply and inverter, which allows reducing the high frequency noise flowing into the power supply via the power lines A and B. Because the inverter is connected to an insulated oscillation transformer, the high frequency noise is fed back to the power supply, but it is absorbed by the noise filter device.

Description

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

【産業上の利用分野】本発明は、ショーケースに陳列し
た商品を照明する高周波インバータを備えたショーケー
ス用放電灯点灯装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device for a showcase provided with a high-frequency inverter for illuminating a product displayed in the showcase.

【従来の技術】従来、ショーケース用点灯装置として
は、グロースタート式チョークコイルが使用されていた
が、省電力の見地から、既設のチョークコイルを高周波
インバータに取替えて使用されるようになってきた。し
かしながら、ショーケース内の配線が複雑なため、既設
の配線をそのまま変更せず使用してチョークコイルを高
周波インバータに取替える必要があった。そのため、高
周波インバータを第２図に示す回路構成とし、第３図の
ようにグロースタート式チョークの配線と同一配線で使
用していた。2. Description of the Related Art Conventionally, a glow-start type choke coil has been used as a lighting device for a showcase. However, from the viewpoint of power saving, an existing choke coil has been replaced with a high-frequency inverter. Was. However, since the wiring in the showcase is complicated, it is necessary to replace the choke coil with a high-frequency inverter using the existing wiring without any change. For this reason, the high-frequency inverter has the circuit configuration shown in FIG. 2 and is used with the same wiring as the wiring of the glow start type choke as shown in FIG.

【考案が解決しようとする課題】しかしながら、第２図
の回路構成の高周波インバータを１組以上組込んだショ
ーケースでは、絶縁型の発振トランス１の出力コイル１
２が電源の一端を介して蛍光ランプ２に接続されている
ため、出力側の高周波電流が電源電流に重畳して雑音端
子電圧が高くなる問題点があった。本発明の目的は、上
記問題点に鑑み、既設のグロースタート式チョークを使
用したショーケースで、既設の配線をそのまま使用しグ
ロースタート式チョークを高周波インバータに取替えた
とき発生する高周波ノイズを低くおさえる方法を提供す
ることにある。However, in a showcase incorporating one or more sets of high-frequency inverters having the circuit configuration shown in FIG. 2, the output coil 1 of the isolated oscillation transformer 1 is not provided.
2 is connected to the fluorescent lamp 2 via one end of the power supply, there is a problem that the high frequency current on the output side is superimposed on the power supply current and the noise terminal voltage increases. In view of the above problems, an object of the present invention is to reduce the high-frequency noise generated when a glow-start type choke is replaced with a high-frequency inverter using the existing wiring as it is in a showcase using an existing glow-start type choke. It is to provide a method.

【課題を解決するための手段】本発明は、上記の目的を
達成するため陳列した商品を照明する蛍光ランプと、該
蛍光ランプを所定の高周波で点灯させるグロースタート
式チョークと同一配線で使用できる高周波インバータと
を備えたショーケースにおいて高周波ノイズを低減する
ため、電源と高周波インバータとの間にノイズフィルタ
装置を挿入したものである。The present invention can be used with the same wiring as a fluorescent lamp for illuminating a displayed product and a glow start type choke for lighting the fluorescent lamp at a predetermined high frequency in order to achieve the above object. In order to reduce high frequency noise in a showcase including a high frequency inverter, a noise filter device is inserted between a power supply and a high frequency inverter.

【作用】本発明によれば、グロースタート式チョークと
同一配線で使用するため、高周波インバータは絶縁型の
発振トランスの出力コイルが電源の一端を介して蛍光ラ
ンプに接続されているため、高周波ノイズがこの接続線
を通じて電源に帰還される。しかし、この高周波ノイズ
は、電源側に設けられたノイズフィルタ装置により吸収
され、電源には殆ど高周波ノイズが重畳されない。According to the present invention, since the high frequency inverter is used with the same wiring as the glow start type choke, the output coil of the insulation type oscillation transformer is connected to the fluorescent lamp via one end of the power supply, so that the high frequency noise is reduced. Is returned to the power supply through this connection line. However, this high frequency noise is absorbed by the noise filter device provided on the power supply side, and the high frequency noise is hardly superimposed on the power supply.

【実施例】第１図は、本発明の実施例を示す配線図、第
２図はショーケースに使用される高周波インバータの回
路図である。第２図において、電源が投入されると、ノ
イズフィルタを介して商用電源は直流変換回路により直
流電圧に変換される。この電圧により発振回路が動作
し、絶縁型発振トランス１の出力コイル１２には高周波
電圧が発生する。出力コイル１２と予熱用コンデンサ３
との共振により、蛍光ランプ２には高電圧と十分な予熱
電流が流れ、蛍光ランプ２は点灯する。蛍光ランプ２が
点灯すると、高周波インバータの内部接続線４、電源の
一端および蛍光ランプ接続線５に高周波電流が流れる。
従ってこの高周波電流はノイズフィルタを通らないた
め、電源には高周波電流が重畳し、高周波ノイズが高く
なる。次に第１図に示すように、電源と高周波インバー
タとの間には、ノイズフィルタ装置６が接続されている
ため、電源ラインＡおよびＢを通して電源に流れ込む高
周波ノイズは軽減される。なお、副次的効果としては、
高周波インバータ内のノイズフィルタは省略することも
できる。FIG. 1 is a wiring diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram of a high-frequency inverter used in a showcase. In FIG. 2, when the power is turned on, the commercial power is converted into a DC voltage by a DC conversion circuit via a noise filter. The oscillation circuit operates by this voltage, and a high-frequency voltage is generated in the output coil 12 of the insulation type oscillation transformer 1. Output coil 12 and preheating capacitor 3
, A high voltage and a sufficient preheating current flow through the fluorescent lamp 2, and the fluorescent lamp 2 is turned on. When the fluorescent lamp 2 is turned on, a high-frequency current flows through the internal connection line 4 of the high-frequency inverter, one end of the power supply, and the fluorescent lamp connection line 5.
Therefore, since this high-frequency current does not pass through the noise filter, the high-frequency current is superimposed on the power supply, and the high-frequency noise increases. Next, as shown in FIG. 1, since the noise filter device 6 is connected between the power supply and the high-frequency inverter, high-frequency noise flowing into the power supply through the power supply lines A and B is reduced. As a side effect,
The noise filter in the high frequency inverter can be omitted.

【発明の効果】以上説明したように、本発明によれば、
既設のグロースタート式チョークを使用しているショー
ケースで、従来と同一配線でグロースタート式チョーク
を高周波インバータに取替えることができ、しかも電源
に流入する高周波ノイズを電源にノイズフィルタ装置を
入れるだけで軽減できる効果を有する。As described above, according to the present invention,
In a showcase that uses an existing glow-start type choke, the glow-start type choke can be replaced with a high-frequency inverter with the same wiring as before, and high-frequency noise flowing into the power supply can be replaced with a noise filter device. It has an effect that can be reduced.

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

【第１図】は本発明の一実施例を示す配線図，FIG. 1 is a wiring diagram showing one embodiment of the present invention,

【第２図】は本発明に使用する高周波インバータの回路
図，FIG. 2 is a circuit diagram of a high-frequency inverter used in the present invention,

【第３図】は従来の配線図，７および８はグローランプ
である。FIG. 3 is a conventional wiring diagram, and 7 and 8 are glow lamps.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 商用電源に接続された高周波インバータ
と、この高周波インバータより給電されて点灯する蛍光
ランプとを１組以上備えた放電灯点灯装置であって、前
記商用電源と、前記高周波インバータとの間にノイズフ
ィルタ装置を挿入してなるショーケース用放電灯点灯装
置。1. A discharge lamp lighting device comprising: a high-frequency inverter connected to a commercial power supply; and at least one set of a fluorescent lamp that is powered and lit by the high-frequency inverter, wherein the commercial power supply, the high-frequency inverter, A discharge lamp lighting device for a showcase comprising a noise filter device inserted between them. 【請求項２】 高周波インバータは、絶縁型の発振トラ
ンスを有し、前記発振トランスの出力コイルの一端が電
源の一端を介して蛍光ランプに接続されてなる請求項１
記載のショーケース用放電灯点灯装置。2. The high-frequency inverter has an insulation type oscillation transformer, and one end of an output coil of the oscillation transformer is connected to a fluorescent lamp via one end of a power supply.
A discharge lamp lighting device for a showcase as described in the above.
JP30543096A 1996-10-11 1996-10-11 Discharge lamp lighting device for showcase Pending JPH10116692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30543096A JPH10116692A (en) 1996-10-11 1996-10-11 Discharge lamp lighting device for showcase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30543096A JPH10116692A (en) 1996-10-11 1996-10-11 Discharge lamp lighting device for showcase

Publications (1)

Publication Number Publication Date
JPH10116692A true JPH10116692A (en) 1998-05-06

Family

ID=17945047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30543096A Pending JPH10116692A (en) 1996-10-11 1996-10-11 Discharge lamp lighting device for showcase

Country Status (1)

Country Link
JP (1) JPH10116692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150305112A1 (en) * 2012-12-06 2015-10-22 Tridonic Gmbh & Co Kg Operating device for illuminant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150305112A1 (en) * 2012-12-06 2015-10-22 Tridonic Gmbh & Co Kg Operating device for illuminant

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