JPH0471308B2 - - Google Patents
Info
- Publication number
- JPH0471308B2 JPH0471308B2 JP18635483A JP18635483A JPH0471308B2 JP H0471308 B2 JPH0471308 B2 JP H0471308B2 JP 18635483 A JP18635483 A JP 18635483A JP 18635483 A JP18635483 A JP 18635483A JP H0471308 B2 JPH0471308 B2 JP H0471308B2
- Authority
- JP
- Japan
- Prior art keywords
- low
- pressure mercury
- pressure
- inert gas
- present
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Landscapes
- Apparatus For Disinfection Or Sterilisation (AREA)
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、食品及びその包装の表面殺菌や、薬
品、化粧品の原水殺菌等に用いられる低圧水銀灯
の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in low-pressure mercury lamps used for surface sterilization of foods and their packaging, sterilization of raw water for medicines and cosmetics, and the like.
従来、各種の殺菌に用いられる低圧水銀灯に
は、一般に熱陰極が使用されている。 Conventionally, a hot cathode has generally been used in low-pressure mercury lamps used for various sterilization purposes.
一方、最近、低圧水銀灯の高出力化の要求が高
まり、電極間距離１cmあたり２〜8Wの入力の
中・高出力形低圧水銀灯が開発され使用されはじ
めた。 On the other hand, recently, there has been a growing demand for higher output low-pressure mercury lamps, and medium-to-high output low-pressure mercury lamps with an input of 2 to 8 W per centimeter of electrode distance have been developed and put into use.
ところが、かかる放電灯の電極として熱陰極を
用いると、ランプ入力、ランプ電流が大きいため
電極が焼損したり、電子放射物質が飛散して放電
灯の寿命が著しく短くなるという問題が生ずる。 However, when a hot cathode is used as an electrode in such a discharge lamp, problems arise in that the lamp input and lamp current are large, so that the electrode burns out and electron emitting substances are scattered, significantly shortening the life of the discharge lamp.
そこで、前記のような中・高出力形の低圧水銀
灯では、これまで、熱陰極の部分を水冷して焼損
を防いだり、管内の不活性ガスの封入圧を高めて
電子放射物質の飛散を防止していた。 Therefore, in the medium- and high-output low-pressure mercury lamps mentioned above, the hot cathode part has been cooled with water to prevent burnout, and the pressure of inert gas sealed inside the tube has been increased to prevent the scattering of electron-emitting substances. Was.
しかし、熱陰極の部分を水冷すると構造が複雑
で大形かつコスト高となる欠点がある。また管内
の不活性ガス封入圧を高めると紫外線出力が低下
し始動性能が低下するという欠点がある。 However, water-cooling the hot cathode part has the disadvantage of making the structure complicated, large, and expensive. Furthermore, there is a drawback that increasing the inert gas filling pressure inside the tube lowers the ultraviolet output and lowers the starting performance.
本発明は、以上の点に鑑みてなされたもので、
構造が簡単でコンパクトかつ経済的であり、紫外
線出力も大きく、始動性能も良好である、中・高
出力形の低圧水銀灯を提供せんとするものであ
る。 The present invention has been made in view of the above points, and
It is an object of the present invention to provide a medium- to high-output low-pressure mercury lamp that is simple, compact, and economical in structure, has a large ultraviolet output, and has good starting performance.
第１図に本発明に係る低圧水銀灯の外観図を示
す。同図において、１は石英ガラス等の耐熱性で
紫外線透過性の材料からなる発光管である。この
発光管１の両端には電極２ａ，２ｂが封着してあ
り、管内には適量の水銀と共にアルゴンガスのご
とき不活性ガスが封入してある。そして、電極２
ａ，２ｂ間距離１cmあたりの入力は２〜8W程度
に設定してある。かかるランプ入力とすること
は、例えば発光管１を直接水冷する等の手段によ
り実現することができる。ただし、このような入
力とすると、ランプ電流は１〜10A程度となり従
来の放電灯に比べて著しく大きくなる。このため
電極として熱陰極を使用することはできなくな
る。そこで、本発明は電極として高圧放電灯で使
用されているような冷陰極を使用する。そのう
え、更に紫外線出力を上げるために管内の不活性
ガス圧を5torr以下に選定する。第２図は不活性
ガスの封入圧と紫外線出力の関係を示すものであ
るが、従来約5torr程度であつた不活性ガス圧を
前記のように5torr以下とすることによつて紫外
線出力を上げうることは明らかである。しかし、
不活性ガスの封入圧を下げると、電極に塗布した
電子放射物質の飛散も著しくなる。特に電極温度
が上昇したときにこの傾向がみられる。そこで、
本発明は、冷陰極２ａ，２ｂに近接して補助陽極
３ａ，３ｂを設けて冷陰極の温度を下げるように
してある。 FIG. 1 shows an external view of a low-pressure mercury lamp according to the present invention. In the figure, reference numeral 1 denotes an arc tube made of a heat-resistant and ultraviolet-transparent material such as quartz glass. Electrodes 2a and 2b are sealed at both ends of the arc tube 1, and an appropriate amount of mercury and an inert gas such as argon gas are sealed inside the tube. And electrode 2
The input power per 1 cm distance between a and 2b is set to about 2 to 8 W. Such a lamp input can be realized by, for example, directly cooling the arc tube 1 with water. However, if such an input is used, the lamp current will be approximately 1 to 10 A, which is significantly larger than that of a conventional discharge lamp. Therefore, it is no longer possible to use a hot cathode as an electrode. Therefore, the present invention uses a cold cathode, such as that used in high-pressure discharge lamps, as an electrode. Furthermore, in order to further increase the ultraviolet output, the inert gas pressure inside the tube is selected to be 5 torr or less. Figure 2 shows the relationship between the inert gas fill pressure and the ultraviolet output.The ultraviolet output can be increased by reducing the inert gas pressure, which used to be about 5 torr, to below 5 torr as described above. It is clear that this is possible. but,
When the sealing pressure of the inert gas is lowered, the scattering of the electron emitting material coated on the electrodes becomes significant. This tendency is especially seen when the electrode temperature rises. Therefore,
In the present invention, auxiliary anodes 3a and 3b are provided close to the cold cathodes 2a and 2b to lower the temperature of the cold cathodes.
その結果、本発明に係る低圧水銀灯は先に述べ
たような入力で、中・高出力化を実現することが
でき、しかも電極の焼損を皆無とし高い紫外線出
力を得ることができるものである。 As a result, the low-pressure mercury lamp according to the present invention can achieve medium to high output with the above-mentioned input, and can obtain high ultraviolet output without burning out the electrodes.
第３図は本発明に係る低圧水銀灯と従来の低圧
水銀灯の紫外線出力の動程特性を示すものであ
る。図中、Ａは本発明に係る低圧水銀灯、Ｂは電
極に冷陰極のみを使用したもの、Ｃは電極に熱陰
極を使用したものの特性を示す。 FIG. 3 shows the dynamic characteristics of the ultraviolet output of the low-pressure mercury lamp according to the present invention and the conventional low-pressure mercury lamp. In the figure, A shows the characteristics of a low-pressure mercury lamp according to the present invention, B shows the characteristics of a lamp using only a cold cathode as an electrode, and C shows the characteristics of a lamp using a hot cathode as an electrode.
第１図は本発明に係る低圧水銀灯の側面図、第
２図は低圧水銀灯における不活性ガス封入圧と紫
外線出力の関係図、第３図は本発明に係る低圧水
銀灯と従来の低圧水銀灯の点灯時間と紫外線出力
の特性比較図である。
Fig. 1 is a side view of the low-pressure mercury lamp according to the present invention, Fig. 2 is a diagram showing the relationship between inert gas filling pressure and ultraviolet output in the low-pressure mercury lamp, and Fig. 3 is the lighting of the low-pressure mercury lamp according to the present invention and the conventional low-pressure mercury lamp. It is a characteristic comparison diagram of time and ultraviolet output.
Claims (1)
ｂとこれに近接する補助陽極３ａ，３ｂを封着す
るとともに、該発光管１の内部に適量の水銀と共
に不活性ガスを5torr以下の圧力で封入してなり、
電極間１cmあたり２〜8Wの入力で点灯されるこ
とを特徴とする低圧水銀灯。1 Cold cathodes 2a, 2 are installed at both ends of the arc tube 1, respectively.
b and the auxiliary anodes 3a and 3b adjacent thereto are sealed, and an appropriate amount of mercury and an inert gas are sealed inside the arc tube 1 at a pressure of 5 torr or less,
A low-pressure mercury lamp characterized by being lit with an input of 2 to 8 W per 1 cm between electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18635483A JPS6079664A (en) | 1983-10-05 | 1983-10-05 | low pressure mercury lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18635483A JPS6079664A (en) | 1983-10-05 | 1983-10-05 | low pressure mercury lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6079664A JPS6079664A (en) | 1985-05-07 |
| JPH0471308B2 true JPH0471308B2 (en) | 1992-11-13 |
Family
ID=16186892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18635483A Granted JPS6079664A (en) | 1983-10-05 | 1983-10-05 | low pressure mercury lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6079664A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053106U (en) * | 1991-07-02 | 1993-01-19 | 雅保 高見 | Sealing machine |
| JPH1015548A (en) * | 1996-07-01 | 1998-01-20 | Janome Sewing Mach Co Ltd | Sterilizing apparatus of around-the-clock purifying and heat insulating apparatus |
| JP4020993B2 (en) * | 1996-09-12 | 2007-12-12 | 蛇の目ミシン工業株式会社 | UV sterilizer for running water |
-
1983
- 1983-10-05 JP JP18635483A patent/JPS6079664A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6079664A (en) | 1985-05-07 |
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