JPH1012196A - Electrodeless discharge lamp, electrodeless discharge lamp device, electrodeless discharge lamp lighting device, ultraviolet ray irradiation device, and fluid treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively radiate ultraviolet rays from an electrodeless discharge lamp. SOLUTION: A housing 2 of a discharge lamp 1 is constituted with an inner wall part 2a and an outer wall part 2b concentrically formed as the inner wall part 2a, the upper end surface between the inner wall part 2a and the outer wall part 2b is closed, each lower end surface is connected in a recessed shape, and an exciting coil 9 is arranged within the inner wall part 2a. A discharge lamp device constituted like this is immersed in a treating bath 3, contact of the fluid 6 in the treating bath 3 with the exciting coil 9 is prevented, and the ultraviolet ray radiation efficiency of the discharge lamp 1 is enhanced.

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, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, an ultraviolet irradiation device and a fluid treatment device using the same, and more particularly to a sterilization system used in a sterilization system. The present invention relates to an electrodeless discharge lamp and the like, which enhances the effect and greatly improves the service life of the system.

[0002]

2. Description of the Related Art As a conventional sterilization system for circulating bath water, for example, the one shown in FIGS. 3 to 5 is known. These sterilize water flowing in the sterilization tank by ultraviolet rays emitted from an ultraviolet radiation lamp.

[0003] In the conventional example shown in FIG. 3, an arc tube 102 radiating ultraviolet rays in the axial direction is provided at the center of a substantially cylindrical sterilization tank 101.
Is arranged. A water inlet 103 is provided on the upper side surface of the sterilization tank 101, and a water outlet 104 is provided on the bottom surface of the sterilization tank 101. A lid 105 is screwed on the upper end surface of the sterilization tank 101, and a rubber waterproof plate 106 is mounted between the upper end surface of the sterilization tank 101 and the inner surface of the lid 105.

[0004] A quartz outer tube 107 is concentrically arranged on the outer periphery of the arc tube 102, and the upper end of the quartz outer tube 107 has a lid 1.
05. The lower end of the quartz outer tube 107 is sealed. Further, electrodes 108 and 109 are provided at both ends of the arc tube 102, respectively.
Is connected to a power supply (not shown).

[0005] In the fluid treatment apparatus in the conventional sterilization system configured as described above, water flowing into the sterilization tank 101 from the inflow port 103 flows around the outer quartz tube 107 and is discharged from the water outlet 104. . During this time, the arc tube 1
Water sterilization is performed by ultraviolet rays radiated from 02.
At this time, since the arc tube 102 is formed in a long columnar shape, the ultraviolet rays are emitted almost uniformly, and uniform sterilization is performed.

In the conventional example shown in FIGS. 4 and 5, a cylindrical water passage 202 formed of quartz glass which penetrates the center of a rectangular box-shaped lamp body 201 and transmits infrared rays is arranged.
Arc tubes 203 parallel to water channel 202 on both sides of
204 is provided. Reflecting plates 205 and 206 are disposed around the outer circumferences of the arc tubes 203 and 204, respectively, and the ultraviolet rays radiated from the arc tubes 203 and 204 pass through the water channel 2.
02 is reflected.

[0007] The fluid treatment apparatus in the conventional sterilization system configured as described above can also uniformly sterilize the water flowing in the water channel 202 as in the case of the conventional example shown in FIG.

In the conventional example shown in FIGS. 6 and 7, arc tubes 102, 203, and 2 having electrodes at both ends shown in FIGS.
An inductive coupling type electrodeless discharge lamp 301 is provided in place of 04. The electrodeless discharge lamp 301 is formed of a transparent material such as quartz glass in a closed cylindrical shape, and has a discharge medium made of mercury and a rare gas sealed therein. An excitation coil 302 is wound around the outer periphery of the lamp 301, and the excitation coil 302 is connected to a high-frequency power source (not shown). The electrodeless discharge lamp 301 is inserted into a sterilization tank 303 having the same structure as that of the conventional example shown in FIG. Then, by passing a high-frequency current through the excitation coil 302, ultraviolet light is output from the electrodeless discharge lamp 301.

The excitation coil 302 is an electrodeless discharge lamp 30
The electrodeless discharge lamp 301 is wound in the water flowing in the sterilization tank 303 in the conventional example shown in FIG.
It is soaked with. In the conventional example shown in FIG. 7, the center of the sterilization tank 303 is formed in a concave shape made of quartz glass or the like, and the electrodeless discharge lamp 301 around which the excitation coil 302 is wound is disposed in the concave section 304. It does not come into direct contact with the water in 303.

[0010]

In the conventional examples shown in FIGS. 3 to 5, since the arc tube is provided with electrodes,
There is a problem that the life is shortened due to the consumption of the electrodes.
In addition, in the conventional examples shown in FIGS. 6 and 7, an electrodeless discharge lamp is used instead of the arc tube, so that the life can be extended. However, in the conventional example shown in FIG. 6, since the excitation coil is exposed to the water which is the sterilizing medium, turbulence occurs when the water passes, causing irregularities in the passage time of the water, and the sterilizing effect is stable. There was a problem not to do.

In the conventional example shown in FIG. 7, since a lamp having an excitation coil wound in a recess formed of quartz glass or the like is arranged at the center of a sterilizing tank, the excitation coil does not come into direct contact with water. No turbulence occurs and the above problem is solved. However, there was a drawback that the structure of the sterilization tank became complicated and the cost increased. Further, in both cases shown in FIGS. 6 and 7, there is a problem that the sterilizing effect is reduced because the ultraviolet rays emitted from the lamp are blocked by the excitation coil.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an electrodeless discharge lamp capable of prolonging the life of a discharge lamp and effectively and uniformly irradiating emitted ultraviolet rays. An electrodeless discharge lamp device used, an electrodeless discharge lamp lighting device for lighting the electrodeless discharge lamp device, an ultraviolet irradiation device using the electrodeless discharge lamp device and the lighting device, and a fluid treatment device having the ultraviolet irradiation device. The purpose is to provide.

[0013]

According to the first aspect of the present invention, there is provided an electrodeless discharge lamp having an inner wall having a cylindrical inner wall, an outer wall formed concentrically with the inner wall, and an outer wall having the outer wall. And a discharge medium that outputs ultraviolet light by being discharged in the enclosure.

In the electrodeless discharge lamp according to the second aspect of the invention, one end between the inner wall and the outer wall is sealed.
The other end is concavely connected.

According to a third aspect of the invention, there is provided an electrodeless discharge lamp, wherein both ends between the inner wall and the outer wall are sealed.
It is formed in a double cylindrical shape.

In the electrodeless discharge lamp according to a fourth aspect of the present invention, the inner wall and the outer wall are each formed of quartz or ceramic having ultraviolet transmittance.

According to a fifth aspect of the invention, an electrodeless discharge lamp device includes the electrodeless discharge lamp according to any one of the first to fourth aspects, and an excitation coil housed in the inner wall.

According to a sixth aspect of the present invention, there is provided an electrodeless discharge lamp lighting device including the electrodeless discharge lamp device according to the fifth aspect, and lighting means for applying a high frequency voltage to the excitation coil.

According to a seventh aspect of the present invention, there is provided an ultraviolet irradiation apparatus including the electrodeless discharge lamp device according to the fifth aspect and the electrodeless discharge lamp lighting device according to the sixth aspect.

The fluid processing apparatus according to the invention of claim 8 includes a fluid to be processed, and a fluid processing section into which the fluid flows in and out and into which the ultraviolet irradiation device according to claim 7 is inserted.

In the fluid processing apparatus according to the ninth aspect of the present invention, the inner wall of the electrodeless discharge lamp and the fluid are separated from each other so as not to contact with each other.

In each of the above inventions, since the electrodeless discharge lamp is used, the lamp life can be extremely extended. In addition, by forming the envelope constituting the discharge lamp into a concave or double cylindrical shape and disposing the excitation coil in the inner wall portion, the excitation coil does not come into contact with the processing fluid, and turbulent flow of the processing fluid is prevented. Can be prevented. Further, the excitation coil does not block ultraviolet rays generated from the discharge lamp.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the configuration of the first embodiment of the fluid treatment apparatus of the present invention. In FIG. 1, an envelope 2 of a discharge lamp 1 includes a concentric cylindrical inner wall portion 2a and an outer wall portion 2b.
One end (upper end in the figure) on one side between the inner wall 2a and the outer wall 2b is sealed. The other end (lower end in the figure) is connected in a concave shape, forming a concave lamp. At least the inner wall portion 2a and the outer wall portion 2 of the envelope 2
b is formed of quartz or ceramic that transmits ultraviolet light.

The envelope 2 is inserted and held in the vertical direction at the center of a cylindrical processing tank 3 which is a fluid processing section. Further, a lid 4 is integrally provided on the upper end surface of the processing tank 3 in a liquid-tight manner, and the envelope 2 penetrates. Further, the envelope 2 of the lid 4
A liquid blocking gasket 5 is mounted between the inner periphery of the hole portion through which the fluid passes and the outer periphery of the outer wall portion 2b. It does not touch the coil. Processing tank 3
An inflow port 7 into which the fluid 6 flows is provided at the upper part of the outer periphery
An outlet 8 from which the fluid 6 flows out is provided on the bottom surface of the processing tank 3.

A plurality of excitation coils 9 formed of a conductor are mounted in the inner wall 2a of the envelope 2. Both ends of the excitation coil 9 are connected to a commercial power supply 12 (for example, 100 V, 50 cycles) via a matching circuit 10 and an RP switch circuit 11 as lighting means. The current supplied from the power supply 12 is converted to a high frequency by the RP switch circuit 11,
, And high-frequency power is effectively transmitted to the discharge lamp 1.

When high-frequency power is supplied to the excitation coil 9, ultraviolet rays due to discharge are emitted from a discharge medium 13 made of mercury and a rare gas sealed in the envelope 2 of the discharge lamp 1. Since this ultraviolet radiation has a discharge shape close to the tube surface, that is, a donut shape, the ultraviolet radiation is efficiently radiated out of the tube. The high frequency frequency at this time is several hundred KHz
To several tens of MHz.

According to the present embodiment, since the excitation coil 9 is housed in the inner wall 2a of the envelope 2, the processing tank 3
There is no direct contact with the fluid 6 inside. Therefore, the flow of the fluid 6 flowing in the processing tank 3 is not disturbed by the excitation coil 9, and the ultraviolet rays can be uniformly irradiated.
Further, since the ultraviolet rays emitted from the discharge lamp 1 toward the fluid 6 in the processing tank 3 are not blocked by the excitation coil 9, the ultraviolet rays can be efficiently irradiated. Further, the structure of the processing tank 3 is simplified, and the cost can be reduced.

The above-mentioned fluid treatment apparatus is effective in sterilizing a liquid, but the same effect can be obtained by applying it to ultraviolet irradiation for other purposes. The same effect can be obtained even when applied alone when used alone as an electrodeless discharge lamp, an electrodeless discharge lamp device, and an ultraviolet irradiation device.

FIG. 2 is a longitudinal sectional view showing the structure of a second embodiment of the fluid treatment apparatus of the present invention. In FIG. 2, parts corresponding to those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. In the present embodiment, the shape of the envelope 2 of the discharge lamp 1 is a double cylindrical shape, and the configuration of other parts is the same as that of the first embodiment. That is, in FIG. 2, the inner wall portion 2a and the outer wall portion 2b are formed concentrically in a double cylindrical shape, and both ends between the inner wall portion 2a and the outer wall portion 2b are sealed, and the lower portion of the inner wall portion 2a is closed. The end face is closed by packing 21.

According to this embodiment, the same operation and effect as those of the first embodiment can be obtained.

[0031]

According to the first to seventh aspects of the present invention, since the excitation coil is disposed in the inner wall of the discharge lamp, the ultraviolet light emitted from the discharge lamp is not blocked by the excitation coil, so that the ultraviolet light is efficiently emitted. be able to.

According to the eighth and ninth aspects of the present invention, the discharge lamp is configured so that the fluid in the fluid processing section does not come into contact with the excitation coil, and the discharge lamp is inserted into the fluid processing tank. As a result, it is possible to prevent the turbulent flow of the fluid flow from being generated by the excitation coil, and it is possible to efficiently treat the fluid with ultraviolet rays.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a first embodiment of a fluid treatment apparatus of the present invention.

FIG. 2 is a longitudinal sectional view showing a configuration of a second embodiment of the fluid treatment apparatus of the present invention.

FIG. 3 is a longitudinal sectional view showing a configuration of a first example of a conventional fluid processing apparatus.

FIG. 4 is a longitudinal sectional view showing a configuration of a second example of the conventional fluid processing apparatus.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a longitudinal sectional view showing a configuration of a third example of a conventional fluid processing apparatus.

FIG. 7 is a longitudinal sectional view showing a configuration of a fourth example of a conventional fluid processing apparatus.

[Explanation of symbols]

Reference Signs List 1 electrodeless discharge lamp 2 envelope 2a inner wall 2b outer wall 3 fluid treatment tank (fluid treatment unit) 6 fluid 9 excitation coil 10 matching circuit (lighting means) 11 RP switch circuit (lighting means)

Claims (9)

[Claims] 1. An envelope having a cylindrical inner wall portion and an outer wall portion formed concentrically with the inner wall portion; and a discharge medium sealed in the outer envelope and outputting ultraviolet light by discharging. An electrodeless discharge lamp comprising: 2. The electrodeless device according to claim 1, wherein an end on one side between the inner wall and the outer wall is closed, and an end on the other side is connected in a concave shape. Discharge lamp. 3. The electrodeless discharge lamp according to claim 1, wherein both end portions between the inner wall portion and the outer wall portion are sealed and formed in a double cylindrical shape. 4. The electrodeless discharge lamp according to claim 1, wherein the inner wall portion and the outer wall portion are each formed of quartz or ceramic having ultraviolet transmittance. 5. An electrodeless discharge lamp device comprising: the electrodeless discharge lamp according to claim 1; and an excitation coil housed in the inner wall. 6. An electrodeless discharge lamp lighting device, comprising: the electrodeless discharge lamp device according to claim 5; and lighting means for applying a high-frequency voltage to an excitation coil. 7. An ultraviolet irradiation apparatus comprising: the electrodeless discharge lamp device according to claim 5; and the electrodeless discharge lamp lighting device according to claim 6. 8. A fluid processing apparatus comprising: a fluid to be processed; and a fluid processing unit into which the fluid flows and from which the ultraviolet irradiation device according to claim 7 is inserted. 9. The fluid processing apparatus according to claim 8, wherein an inner wall portion of the electrodeless discharge lamp and the fluid are separated from each other so as not to be in contact with each other.