JPH1012193A - Electrodeless discharge lamp, electrodeless discharge lamp lighting device, and fluid treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly emit light from a thin electrodeless light emitting tube over the whole length. SOLUTION: Discharge gas is sealed inside a light emitting tube 1, and an induction coil 2a is wound around the light emitting tube 1 so as to exceed the whole length of the light emitting tube 1. When high frequency electric power is applied to the induction coil 2a, a magnetic flux density generating from the induction coil 2a is dense inside the induction coil 2a and coarse in the outside, but since the induction coil 2a is wound so as to exceed the whole length of the light emitting tube 1, the light emitting tube uniformly emits light over the whole length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeless discharge lamp in which an induction coil is wound around an elongated electrodeless arc tube, an electrodeless lamp lighting device, and ultraviolet light (UV) radiated from the arc tube. The present invention relates to a fluid processing apparatus that performs processing such as sterilization of a fluid such as water by light.

[0002]

2. Description of the Related Art In this type of electrodeless discharge lamp, as shown in FIG. 8, a discharge gas is sealed inside an elongated arc tube 1, but no electrode is provided. Then, in order to discharge and light the discharge gas inside the arc tube 1,
An induction coil 2 is wound around the arc tube 1 over the entire length L0 of the arc tube 1, and a high-frequency power of 1 MHz or more is applied to the coil 2 from a high-frequency power source 3 to an impedance matching circuit 4.
, A magnetic field M is generated from the induction coil 2 to discharge and light the discharge gas inside the arc tube 1 as shown in FIG. A conventional example of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 52-65082.

[0003]

As shown in FIG. 9, magnetic flux lines M generated from the induction coil 2 are dense inside the induction coil 2 and coarse outside the induction coil. However, in the above-described conventional electrodeless discharge lamp, the entire length L0
In this case, the induction coil 2 is wound only over the center of the arc tube 1, so that it becomes bright at the center of the arc tube 1 and dark at the ends thereof, so that there is a problem that uneven light emission occurs in the longitudinal direction of the arc tube 1.

Further, a discharge gas (for example, H
g) is sealed in the arc tube 1 and applied to a fluid processing apparatus for sterilizing and polymerizing by flowing a fluid such as water in the longitudinal direction of the arc tube 1. Since a sufficiently long exposure time cannot be obtained, sufficient sterilization and polymerization effects cannot be obtained.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an electrodeless discharge lamp and an electrodeless discharge lamp lighting device capable of emitting light uniformly over the entire length of an elongated arc tube. I do. Another object of the present invention is to provide a fluid treatment apparatus that can achieve a fluid treatment effect such as sufficient sterilization and polymerization.

[0006]

According to a first aspect of the present invention, there is provided an elongated arc tube in which a discharge gas is sealed, and at least one end extending from one end of the arc tube in a longitudinal direction. An electrodeless discharge lamp having an induction coil wound to extend. With the above configuration, even if the magnetic flux lines generated from the induction coil are rough outside the induction coil, at least one end of the induction coil is wound so as to extend longitudinally outward from one end of the arc tube,
At least the central portion and one end of the arc tube can emit light uniformly, and both ends of the induction coil are wound so as to extend from both ends of the arc tube to the outside in the longitudinal direction. Light can be emitted uniformly over the whole.

According to a second aspect of the present invention, there is provided an elongated arc tube in which a discharge gas is sealed, and an induction coil wound so as to extend from one end to the other end in the longitudinal direction of the arc tube. And an end of each of the coil and the arc tube is held by the same holding portion. With the above configuration, one end of the arc tube may be dark, and the other end can be used for uniform light emission.

According to a third aspect of the present invention, in the electrodeless discharge lamp of the first or second aspect, the arc tube is supported in an outer tube longer than the entire length of the arc tube, and the induction coil extends the entire length of the arc tube. The outer tube is wound around the outer tube so as to exceed the outer tube. With the above configuration, since the induction coil is wound long so as to exceed the entire length of the arc tube,
Light can be uniformly emitted over the entire length of the arc tube, and when applied to a fluid processing apparatus, a fluid can be flowed into the outer tube for processing.

According to a fourth aspect of the present invention, in the electrodeless discharge lamp according to the first or second aspect, the luminous tube has a cylindrical luminous space in which a discharge gas is sealed and has a cavity in a longitudinal direction inside. It is characterized by being formed in. According to the above configuration, since the induction coil is wound over the entire length of the arc tube, it is possible to emit light uniformly over the entire length of the arc tube. The fluid can also flow into the cavity of the arc tube for processing.

[0010] According to a fifth aspect of the present invention, there is provided an elongated arc tube in which a discharge space in which a discharge gas is sealed is formed in a cylindrical shape and has a cavity in a longitudinal direction of the interior thereof; An electrodeless discharge lamp having an induction coil wound at least at one end so as to extend longitudinally outward from one end of the arc tube. With the above configuration, even if the magnetic flux lines generated from the induction coil are rough outside the induction coil, at least one end of the induction coil is wound so as to extend longitudinally outward from one end of the arc tube, At least the central portion and one end of the arc tube can emit light uniformly, and the both ends of the induction coil are wound from both ends of the arc tube so as to extend outward in the longitudinal direction. Can emit light uniformly

According to a sixth aspect of the present invention, there is provided an elongated arc tube in which a discharge space in which a discharge gas is sealed is formed in a cylindrical shape and has a cavity in an internal longitudinal direction, and the entire length of the arc tube. An electrodeless discharge lamp in which an induction coil is wound around a core so as to exceed the above, and the induction coil and the core are provided in the cavity of the arc tube. According to the above configuration, since the induction coil is wound over the entire length of the arc tube, it is possible to emit light uniformly over the entire length of the arc tube. In this case, starting from the unlit state to the lit state can be efficiently performed.

According to a seventh aspect of the present invention, there is provided an electrodeless discharge lamp lighting apparatus having a high frequency power supply for supplying high frequency power to the induction coil according to the first to sixth aspects. With the above configuration, since the induction coil is wound over the entire length of the arc tube,
An electrodeless discharge lamp lighting device that can emit light uniformly over the entire length of the arc tube can be realized.

According to an eighth aspect of the present invention, the discharge gas enclosed in the arc tube according to the seventh aspect is a material which emits ultraviolet rays, and the discharge gas and the discharge tube are capable of emitting ultraviolet rays to a fluid to be treated with ultraviolet rays. A fluid treatment device having an induction coil disposed therein. With the above configuration, since the induction coil is wound over the entire length of the arc tube, it is possible to emit light uniformly over the entire length of the arc tube,
As a result, a sufficient fluid treatment effect such as sterilization and polymerization can be realized.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of an electrodeless discharge lamp and an electrodeless discharge lamp lighting device according to the present invention,
FIG. 2 is an explanatory diagram showing a magnetic field generated by the induction coil of FIG. 1 and light emission characteristics of the electrodeless discharge lamp, and FIG. 3 is a configuration diagram showing an embodiment of the fluid processing apparatus according to the present invention. The same members as those described in the conventional example are denoted by the same reference numerals.

In FIG. 1, a discharge gas is sealed inside the arc tube 1, and no electrodes are provided. In addition,
As a discharge gas, for example, when emitting UV light, H
g, and at least one of Ar, Kr, Xe, Ne, and the like. The induction coil 2a is wound around the arc tube 1 over the entire length L0 of the arc tube 1 (L1> L0). A high frequency power of 1 MHz or more, for example, a 2 MHz band or 13.56 MHz is applied to the induction coil 2 a from a high frequency power supply 3 via an impedance matching circuit 4.

In such a configuration, the induction coil 2a
When high frequency power is applied to the induction coil 2a as shown in FIG.
Is dense inside and coarse outside, but the induction coil 2
a is wound over the entire length L0 of the arc tube 1,
Light can be emitted uniformly over the entire length of the arc tube 1.

FIG. 3 shows a fluid processing apparatus to which the above-mentioned electrodeless discharge lamp and the electrodeless discharge lamp lighting device are applied.
By exposing the fluid 6 such as water or an organic solvent flowing in the fluid pipe 5 to UV light, processes such as sterilization and polymerization are performed. The fluid pipe 5 is formed of, for example, quartz that can transmit UV light, and the processing unit 5a of the fluid pipe 5 is configured such that the fluid 6 flowing from left to right flows downward, and then flows upward. It is formed so as to flow to the right and to form a U-shape so that the fluid 6 in this flow path can be exposed to UV light.

The arc tube 1 and the induction coil 2a are provided in the recess 5b of the processing section 5a, and the U-shaped processing section 5 is provided.
The fluid 6 passing through a is exposed to UV light that uniformly emits light from the upper end, the center, and the lower end of the arc tube 1. Therefore, since the exposure time is prolonged, it is possible to realize a sufficient fluid treatment effect such as sterilization and polymerization. In addition, as a target of this kind, for example, the present invention can be applied to a 24-hour bath in which water in a bath is heated and sterilized for 24 hours.

The second embodiment shown in FIG. 4 is a modification of the first embodiment. One end of the induction coil 2b does not exceed the entire length of the arc tube 1 at one end of the arc tube 1, and substantially coincides with each other. The other end of the arc tube 1 is wound so as to exceed the entire length L0 of the arc tube 1 as in the first embodiment (L2> L0). Further, both ends of the induction coil 2b and the arc tube 1 are supported by the same lamp holder 7.

Here, the concave portion 5b of the process 5a shown in FIG.
When the upper end of the arc tube 1 is provided so as to protrude from the concave portion 5b, the center of the arc tube 1 and the lower end thereof are U-shaped.
It is necessary to emit V light uniformly, but it is not necessary to emit light uniformly at the upper end. Therefore, according to the second embodiment, a sufficient fluid treatment effect can be realized by winding the induction coil 2b according to the usage mode, and the induction coil 2b and the arc tube 1 are shared. Lamp holder 7
The handling becomes convenient by instructing by. When the UV light needs to be emitted uniformly from the center and the lower end of the arc tube 1 as in the application shown in FIG. , 2b may be arranged such that the upper end thereof is located inside the upper end of the arc tube 1, and in this case, the coil 2
The lengths L1 and L2 of a and 2b may be equal to or shorter than the total length L0 of the arc tube 1 (L1, L2 ≦ L0).

Next, a third embodiment will be described with reference to FIG. In this example, the arc tube 1 is supported by the inside 11a of the outer tube 11 longer than the arc tube 1 (L1> L0), and the coil 2a extends around its entire length L1 around the outer tube 11, that is, the entire length L0 of the arc tube 1 It is wound to exceed. According to such a configuration, in addition to having the above-described effects, the fluid 6 can also pass through the inside 11a of the outer tube 11, so that a more sufficient fluid treatment effect can be realized.

FIG. 6 shows a fourth embodiment, in which an arc tube 1a is shown.
Is formed in a so-called bamboo ring shape in which the light emitting space in which the discharge gas is sealed is cylindrical and has a cavity 1b in the longitudinal direction inside. More specifically, the cavity 1b is in communication with the outside air, and a discharge gas is sealed inside the arc tube 1a having a cylindrical surface. Similarly, the coil 2a is wound around the arc tube 1a so as to exceed the entire length L0 of the arc tube 1 (L1> L0). In this case as well, as in the third embodiment, the above-described effect is obtained, and the fluid 6 can also pass through the cavity 1b of the arc tube 1a.
Further, a sufficient fluid treatment effect can be realized.

FIG. 7 shows a fifth embodiment, in which an arc tube 1a is shown.
Is similarly formed in a bamboo ring shape having a cavity 1b. The coil 2b has a length L1 around a cylindrical glass or carbonyl iron dust core 12 longer than the arc tube 1a.
, That is, over the entire length L0 of the arc tube 1a, and the coil 2b and the core 12 are provided in the cavity 1b. According to the fifth embodiment, while having the above-described effects, by further winding the coil 2b around the carbonyl iron dust core 12, more magnetic field can be generated. The operation of starting the lighting state can be simplified.

[0024]

As described above, according to the first aspect of the present invention, an elongated arc tube in which a discharge gas is sealed, and at least one end extending outward from the one end of the arc tube in the longitudinal direction. And an induction coil wound around the induction coil, even if the magnetic flux lines generated from the induction coil are rough outside the induction coil, it is possible to uniformly emit light at least at the center and one end of the arc tube. By winding both ends of the coil so as to extend outward in the longitudinal direction from both ends of the arc tube, light can be emitted uniformly over the entire length of the arc tube.

According to the second aspect of the present invention, the coil is wound so as to extend from substantially one end to the other end of the arc tube, and each end of the coil and the arc tube is held by the same holding portion. Therefore, one end of the arc tube may be dark, and the other end can be used for uniform light emission.

According to the third aspect of the present invention, the arc tube is supported in the outer tube longer than the entire length of the arc tube, and the induction coil is wound around the outer tube so as to exceed the entire length of the arc tube. It is possible to uniformly emit light over the entire length of the arc tube, and when applied to a fluid processing apparatus, it is possible to process by flowing a fluid also in the outer tube.

According to the fourth aspect of the present invention, the arc tube is formed such that the light emitting space in which the discharge gas is sealed is cylindrical and has a cavity in the longitudinal direction inside, so that the induction coil emits light. It is wound over the entire length of the tube, so that light can be emitted uniformly over the entire length of the arc tube. The fluid can be flowed and processed.

According to the fifth aspect of the present invention, at least one end of the induction coil extends longitudinally outward from one end of the arc tube even if the magnetic flux lines generated from the induction coil are rough outside the induction coil. As a result, at least the central portion and one end of the arc tube can emit light uniformly, and both ends of the induction coil are wound so as to extend longitudinally outward from both ends of the arc tube. As a result, light can be emitted uniformly over the entire length.

According to the sixth aspect of the present invention, the luminous space in which the discharge gas is sealed has a cylindrical shape and has an elongated luminous tube formed so as to have a cavity in the longitudinal direction inside the luminous space. Since the induction coil was wound around the core over the entire length of the tube and these induction coil and core were provided within the arc tube cavity, the induction coil was wound over the entire length of the arc tube and thus The light can be emitted uniformly over the entire length of the arc tube, and the induction coil is wound around the core of the magnetic body, thereby efficiently starting from the light-off state to the light-on state. be able to.

According to the seventh aspect of the present invention, it is possible to realize an electrodeless discharge lamp lighting device capable of emitting light uniformly over the entire length of the arc tube.

According to the seventh aspect of the present invention, the discharge gas sealed in the arc tube is a material that emits ultraviolet light,
Since the arc tube and the induction coil are arranged so that the ultraviolet rays can be emitted to the fluid to be subjected to the ultraviolet treatment, it is possible to realize a fluid treatment effect such as sufficient sterilization and polymerization.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of an electrodeless discharge lamp and an electrodeless discharge lamp lighting device according to the present invention.

FIG. 2 is an explanatory diagram showing a magnetic field generated by the induction coil of FIG. 1 and light emission characteristics of an electrodeless discharge lamp.

FIG. 3 is a configuration diagram showing one embodiment of a fluid processing apparatus according to the present invention.

FIG. 4 is a configuration diagram illustrating an electrodeless discharge lamp according to a second embodiment.

FIG. 5 is a configuration diagram illustrating an electrodeless discharge lamp according to a third embodiment.

FIG. 6 is a configuration diagram illustrating an electrodeless discharge lamp according to a fourth embodiment.

FIG. 7 is a configuration diagram illustrating an electrodeless discharge lamp according to a fifth embodiment.

FIG. 8 is a configuration diagram showing a conventional electrodeless discharge lamp and an electrodeless discharge lamp lighting device.

FIG. 9 is an explanatory diagram showing a magnetic field generated by the induction coil of FIG. 8 and light emission characteristics of the electrodeless discharge lamp.

[Explanation of symbols]

 1, 1a Arc tube 1b Cavity 2a, 2b Induction coil 3 High frequency power supply 4 Impedance matching circuit 6 Fluid 11 Outer tube 12 Core

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akihiro Inoue Toshiba Lighting & Technology Corporation 4-3-1 Higashishinagawa Shinagawa-ku Tokyo

Claims (8)

[Claims] 1. An electrodeless discharge lamp comprising: an elongated arc tube in which a discharge gas is sealed; and an induction coil wound so that at least one end extends longitudinally outward from one end of the arc tube. . 2. An elongated arc tube in which a discharge gas is sealed; and an induction coil wound so as to extend from one end of the arc tube to the other end in the longitudinal direction, and An electrodeless discharge lamp wherein one end of each of a coil and an arc tube is held by a same holding portion. 3. The arc tube is supported in an outer tube longer than the entire length of the arc tube, and the induction coil is wound around the outer tube so as to exceed the entire length of the arc tube. The electrodeless discharge lamp according to claim 1. 4. The luminous tube according to claim 1, wherein the luminous space in which the discharge gas is sealed is formed in a cylindrical shape and has a cavity in a longitudinal direction of the luminous space. Electrodeless lamp. 5. An elongated arc tube in which a discharge space in which a discharge gas is sealed is formed in a cylindrical shape and has a cavity in an internal longitudinal direction; and at least one end in the cavity of the arc tube. And an induction coil wound to extend longitudinally outward from one end of the electrodeless discharge lamp. 6. A light emitting space in which a discharge gas is sealed has an elongated light emitting tube formed to have a cylindrical shape and a cavity in a longitudinal direction thereof, and an induction coil extends over the entire length of the light emitting tube. Is wound around a core, and the induction coil and the core are provided in the cavity of the arc tube. 7. An electrodeless discharge lamp lighting device having a high frequency power supply for supplying high frequency power to the induction coil according to claim 1. 8. The discharge gas enclosed in the arc tube according to claim 7, wherein the discharge gas is a material that emits ultraviolet rays, and the arc tube and the induction coil are arranged so that ultraviolet rays can be emitted to a fluid to be subjected to ultraviolet treatment. A fluid treatment device characterized by the above-mentioned.