JPH1050269A - Electrodeless discharge lamp, electrodeless discharge lamp device, electrodeless discharge lamp lighting device, and fluid treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent attaching dirt in low-priced constitution. SOLUTION: A light emitting tube 1 is manufactured by sealing a discharge gas G in a tube made of ultraviolet ray transmitting type fluororesin, then pinch-sealing both ends. A plurality of light emitting tubes 1-1-1-9 are arranged in parallel in one pipe 4, and an induction coil 2 is wound around the pipe 4. High frequency electric power is applied to the induction coil 2 from a high frequency power source 3, and the discharge gas within the light emitting tube 1 is discharged by a magnetic field from the induction coil 2, and the light emitting tube 1 is lit. Fluid 5 such as water and an organic solvent flows in the pipe 4, and ultraviolet rays are irradiated to the fluid 5 to conduct sterilization or polymerization.

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 apparatus, and an electrodeless discharge lamp for performing a treatment such as sterilization on a fluid such as water, sewage, or air by ultraviolet (UV) light. The present invention relates to an apparatus and a fluid treatment apparatus.

[0002]

2. Description of the Related Art A method of disposing a luminous tube for emitting UV light in a fluid to be treated such as water, sewage, air, etc. for sterilization or the like is disclosed in, for example, JP-A-8-57477. A method using an electroded lamp,
As shown in JP-A-37660, a method using an electrodeless lamp having an induction coil disposed outside is known.

[0003]

By the way, when the arc tube is disposed inside the object to be treated and the treatment is performed, there is a problem that the outer surface of the arc tube tends to be stained. If used continuously,
At most 13,000 hours is the limit. Then, in order to prevent the outer surface of the arc tube from being stained, a method of using a fluorine resin which is less likely to be stained as a material of the electrode lamp is considered. However, when manufacturing a lamp using such a material, even if a rare gas is sealed by a pinch seal and the electrode is fixed, it cannot be sealed due to a difference in thermal expansion coefficient between the electrode and the fluororesin. There is a problem.

[0004] Quartz and ceramics are generally used as the material of the electrodeless lamp. Quartz is a material itself, and ceramic is an inexpensive material, but a rare gas is sealed by a pinch seal. However, there is a problem in that an adhesive is required because of the inability to perform the process, and as a result, the manufacturing cost is high.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides an electrodeless discharge lamp, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, and a fluid treatment device, which can be prevented from being stained with an inexpensive structure. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided a discharge medium which emits ultraviolet rays by discharging, and wherein the discharge medium is sealed, An electrodeless discharge lamp, comprising: an envelope in which a main part through which ultraviolet rays emitted by the discharge medium are transmitted is made of an ultraviolet-permeable fluororesin. According to the above configuration, since the ultraviolet transmitting fluororesin is hardly stained, it is possible to prevent the surface of the tube wall from being stained.

According to a second aspect of the present invention, in the electrodeless discharge lamp according to the first aspect, at least one of the envelopes has a pinch seal portion. According to the above configuration, the electrodeless discharge lamp does not need to be pinch-sealed, and therefore can be manufactured using an inexpensive pinch-seal method.

According to a third aspect of the present invention, in the electrodeless discharge lamp according to the first or second aspect, the tube wall is a single tube. With the above configuration, it is possible to prevent the surface of the tube wall of the single tube made of the ultraviolet-transmitting fluororesin from being stained.

According to a fourth aspect of the present invention, in the electrodeless discharge lamp of the first or second aspect, the tube wall has an outer tube and an inner tube, and the discharge medium is provided between the outer tube and the inner tube. It is a sealed double tube. With the above configuration, it is possible to prevent the surfaces of the outer tube and the inner tube of the double tube made of the ultraviolet-transmitting fluororesin from being stained.

According to a fifth aspect of the present invention, in the electrodeless discharge lamp according to any one of the first to fourth aspects, the inner surface of the tube wall is coated with ceramics. With the above-described configuration, it is possible to prevent mercury ions from entering the tube wall and to prevent the tube wall from deteriorating. As a result, the life can be prolonged.

According to a sixth aspect of the present invention, there is provided an electrodeless discharge lamp device wherein an induction coil is wound around a tube wall according to any one of the first to fifth aspects. With the above configuration, it is possible to realize an electrodeless discharge lamp device that is inexpensive and does not stain the electrodeless discharge lamp.

According to a seventh aspect of the present invention, there is provided an electrodeless discharge lamp lighting device including a high frequency power supply for supplying high frequency power to the induction coil according to the sixth aspect. According to the above configuration, it is possible to realize an electrodeless discharge lamp lighting device in which the electrodeless discharge lamp is not stained with an inexpensive configuration.

According to an eighth aspect of the present invention, there is provided an electrodeless discharge lamp lighting device comprising a microwave supply means for supplying a microwave to the electrodeless discharge lamp according to any one of the first to fifth aspects. It is. According to the above configuration, it is possible to realize an electrodeless discharge lamp lighting device in which the electrodeless discharge lamp is not stained with an inexpensive configuration.

According to a ninth aspect of the present invention, there is provided a fluid processing apparatus wherein the electrodeless discharge lamp according to any one of the first to eighth aspects is disposed in a pipe for flowing a fluid to be processed. It is. With the above configuration, the fluid to be treated can be treated for a long time.

[0015] The invention according to claim 10 is the invention according to claims 1 to 5.
The electrodeless discharge lamp according to any one of the above, is disposed in a pipe for flowing a fluid to be treated, and an induction coil is wound around the pipe, and a high frequency power supply for supplying a high frequency power to the induction coil A fluid processing apparatus having a power supply. With the above configuration, the fluid to be treated can be treated for a long time.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of an electrodeless discharge lamp, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, and a fluid treatment device according to the present invention.
3 is a perspective view showing the fluid processing apparatus of FIG. 1, FIG. 3 is an explanatory view showing a method of manufacturing the arc tube of FIG. 1, and FIG. 4 is an explanatory view showing another method of manufacturing the arc tube of FIG.

1 and 2, a discharge gas G is sealed in each of a plurality of elongated arc tubes 1 (1-1 to 1-9), and the tube walls are made of Teflon (registered by DuPont, USA). (Trademark) or the like. For example, when emitting UV light, the discharge gas G is filled with Hg and at least one of Ar, Kr, Xe and Ne.

The plurality of arc tubes 1 are connected to one pipe 4
The induction coil 2 is wound around a pipe 4. High frequency power of 1 MHz or more, for example, 2 MHz band or 13.56 MHz is applied to the induction coil 2 from the high frequency power supply 3, and the magnetic field from the induction coil 2 discharges and lights the discharge gas G in the arc tube 1. A fluid 5 such as water or an organic solvent flows through the pipe 4 and the fluid 5
Exposure to V light performs treatments such as sterilization and polymerization.

Here, the arc tube 1 constitutes the electrodeless discharge lamp according to the present invention. The arc tube 1 and the induction coil 2 constitute an electrodeless discharge lamp device according to the present invention.
According to such an electrodeless discharge lamp device, the arc tube 1 and the induction coil 2 are supported by the support member, and sockets for connecting to the high-frequency power supply 3 are provided at both ends of the induction coil 2. Can be. The arc tube 1, the induction coil 2, and the high-frequency power source 3 constitute an electrodeless discharge lamp lighting device according to the present invention. Further, the arc tube 1
Discharges itself due to the microwave generated by the magnetron,
Since the lamp is turned on, the arc tube 1 can be provided without providing the induction coil 2.
And a microwave generator (not shown) alone can constitute an electrodeless discharge lamp lighting device. The electrodeless discharge lamp lighting device and the pipe 4 constitute a fluid processing device according to the present invention.

Such an arc tube 1 is, for example, shown in FIG.
A tube 1 'made of an ultraviolet-transmissive fluororesin as shown in FIG. 3 is cut into appropriate lengths, and then, as shown in FIG. It can be manufactured by pinch sealing (P shown by a broken line). Further, as another manufacturing method, as shown in FIG. 4, the other end is pinch-sealed while the discharge gas G is sealed in a tube 1 ″ made of an ultraviolet-transmitting fluororesin having one end terminated in advance. Therefore, according to the present invention, since the tube wall of the arc tube 1 is formed of the ultraviolet transmitting fluororesin, it is possible to prevent the surface of the arc tube 1 from being contaminated by the fluid 5, and the arc tube 1 Since it is an electrodeless discharge lamp, it is not necessary to seal the electrodes unlike the electrodeed discharge lamp, so that it can be manufactured at a low cost by using the pinch seal method.

Next, a second embodiment will be described with reference to FIGS. In the second embodiment, only the configuration of the arc tube 10 is different.
And the pipe 4 is the same as that of the first embodiment. Arc tube 1
Reference numeral 0 denotes a so-called bamboo ring shape having an outer tube 10b and an inner tube 10c such that a light emitting space (discharge space) in which the discharge gas G is sealed is cylindrical and a cavity (hollow portion) 10a is formed in the longitudinal direction of the inside. It is formed with. More specifically, the cavity 10a
Are electrically connected to the outside air, and a discharge gas is sealed inside the arc tube 10 having a cylindrical surface. According to such a configuration, since the fluid 5 can be exposed by the UV light radiated both outside and inside from the discharge space of the arc tube 10, the UV light can be more effectively used. Further, depending on the application, the fluid 5 may flow only to one of the outside and the inside.

Here, the present inventor has proposed a bamboo ring-shaped arc tube 1.
0 was experimentally produced as follows. Outer diameter of outer tube 10b: 100 mm Outer diameter of inner tube 10c: 60 mm Full length: 500 mm Filled gas: Hg, Ar 133 Pa Both Teflon lamp input of outer tube 10 b and inner tube 10 c: 1000 W Lighting frequency: 13.3 MHz Inner diameter of pipe 4: 300mm

Three luminous tubes 10 were arranged in the pipe 4, and the flow rate and the lighting time of the treated water capable of achieving the sterilization efficiency of 99.99% were measured. 0Hr: 3000m3 / day 10,000Hr: 2700m3 / day 30000Hr: 2400m3 / day 50000Hr: 2100m3 / day According to the experimental results, the life of the conventional electrodeless lamp (13000)
Hr) and was found to maintain a very long life. The life can be extended by coating the inner surfaces of the arc tubes 1 and 10 with ceramics on the inner surfaces of the arc tubes 1 and 10, that is, the surfaces to which the discharge gas G contacts.

Next, a third embodiment will be described with reference to FIGS. In the first and second embodiments, the induction coil 2 is wound around the pipe 4, but in the third embodiment, the induction coil 2 is wound around each of the arc tubes 10. Further, the plurality of arc tubes 10 are arranged in parallel in one pipe 4, and high-frequency power 3 is supplied to each induction coil 2. Also in this case, similarly, since the tube wall of the arc tube 10 is formed of an ultraviolet transmitting fluororesin, it is possible to prevent the surface of the arc tube 10 from being contaminated by the fluid 5, and the arc tube 10 is an electrodeless discharge lamp. In addition, since it is not necessary to seal the electrodes unlike the electrodeed discharge lamp, it can be manufactured at a low cost using the pinch seal method.

[0025]

As described above, according to the first aspect of the present invention, the main part of the tube wall for sealing the discharge medium therein is made of the ultraviolet-permeable fluororesin, so that the ultraviolet-permeable fluororesin is free from dirt. Therefore, it is possible to prevent the surface of the tube wall from being stained.

According to the second aspect of the present invention, since the mercury and the rare gas are sealed inside by pinch-sealing at least one of both ends of the ultraviolet-transparent fluororesin cylinder, it is manufactured using an inexpensive pinch seal method. be able to.

According to the third aspect of the present invention, it is possible to prevent the surface of the wall of the single tube made of the ultraviolet-permeable fluororesin from being stained.

According to the fourth aspect of the present invention, it is possible to prevent the surface of the outer tube and the inner tube of the double tube made of the ultraviolet-permeable fluororesin from being stained.

According to the fifth aspect of the present invention, since the inner surface of the tube wall is coated with ceramics, the life can be extended.

According to the sixth aspect of the present invention, since the induction coil is wound around the tube wall, it is possible to realize an electrodeless discharge lamp device which is inexpensive and does not stain the electrodeless discharge lamp.

According to the seventh and eighth aspects of the present invention, it is possible to realize an electrodeless discharge lamp lighting device which is inexpensive and does not stain the electrodeless discharge lamp.

According to the ninth and tenth aspects of the present invention, the fluid to be treated can be treated for a long time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an electrodeless discharge lamp, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, and a fluid treatment device according to the present invention.

FIG. 2 is a perspective view showing the fluid processing apparatus of FIG. 1;

FIG. 3 is an explanatory view showing a method of manufacturing the arc tube of FIG. 1;

FIG. 4 is an explanatory view showing another method for manufacturing the arc tube of FIG. 1;

FIG. 5 is a cross-sectional view illustrating an electrodeless discharge lamp, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, and a fluid processing device according to a second embodiment.

6 is a side sectional view showing the arc tube of FIG. 6;

FIG. 7 is a configuration diagram illustrating an electrodeless discharge lamp, an electrodeless discharge lamp device, an electrodeless discharge lamp lighting device, and a fluid processing device according to a third embodiment.

8 is a cross-sectional view showing the electrodeless discharge lamp, the electrodeless discharge lamp device, the electrodeless discharge lamp lighting device, and the fluid processing device of FIG.

[Explanation of symbols]

 G Discharge gas P Pinch seal 1,10 Arc tube 1 ', 1 "Ultraviolet transparent fluororesin tube 2 Induction coil 3 High frequency power supply 4 Pipe 5 Fluid

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication H05B 41/24 H05B 41/24 M N (72) Inventor Keisuke Kuuga 4-chome Higashishinagawa, Shinagawa-ku, Tokyo No.3-1 Inside Toshiba Litec Co., Ltd. (72) Inventor Tsutomu Kakitani 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside (72) Inventor Ichiro Yokoseki 4-chome Higashishinagawa, Shinagawa-ku, Tokyo No. 1 Toshiba Lighting & Technology Corporation (72) Kozo Uemura Inventor 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Lighting-Tech Corporation (72) Shigeru Kawatsuru 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation

Claims (10)

[Claims] A discharge medium that emits ultraviolet light by discharging; a discharge medium enclosed therein; and a main part of a tube wall through which ultraviolet light emitted by the discharge medium is transmitted is made of an ultraviolet-permeable fluororesin. An electrodeless discharge lamp, comprising: an envelope; 2. The electrodeless discharge lamp according to claim 1, wherein a pinch seal portion is provided on at least one of the envelopes. 3. The electrodeless discharge lamp according to claim 1, wherein the tube wall is a single tube. 4. The tube according to claim 1, wherein the tube wall is a double tube having an outer tube and an inner tube, wherein the discharge medium is sealed between the outer tube and the inner tube. 2. The electrodeless discharge lamp according to 2. 5. The electrodeless discharge lamp according to claim 1, wherein an inner surface of the tube wall is coated with a ceramic. 6. An electrodeless discharge lamp device, wherein an induction coil is wound around a tube wall according to any one of claims 1 to 5. 7. An electrodeless discharge lamp lighting device comprising a high frequency power supply for supplying high frequency power to the induction coil according to claim 6. 8. An electrodeless discharge lamp lighting device comprising a microwave supply means for supplying microwaves to the electrodeless discharge lamp according to claim 1. Description: 9. A fluid processing apparatus, wherein the electrodeless discharge lamp according to claim 1 is disposed in a pipe for flowing a fluid to be processed. 10. The electrodeless discharge lamp according to claim 1, wherein the electrodeless discharge lamp is disposed in a pipe for flowing a fluid to be treated, and an induction coil is wound around the pipe. A fluid processing apparatus comprising a high-frequency power supply for supplying a high-frequency power to the induction coil.