JP3653534B2 - Electrodeless discharge lamp unit, electrodeless discharge lamp device, and fluid treatment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrodeless discharge lamp unit suitable for receiving a supply of high frequency power from a separated high frequency power source and easy to handle, an electrodeless discharge lamp device using the same, and a fluid processing apparatus.
[0002]
[Prior art]
In JP-A-6-310291, a high-frequency power source and a bulb-shaped electrodeless discharge lamp are separated and connected by a coaxial cable, and impedance matching circuits are provided at both ends of the coaxial cable. An electrodeless discharge lamp lighting device in which the impedance matching circuit is housed in a load side unit is shown in FIG. 4 and the related description (prior art 1).
[0003]
The prior art 1 describes that the impedance matching can be adjusted separately for the load side unit and the power source side unit by using two impedance matching circuits at both ends of the coaxial cable.
[0004]
JP-A-2-37660 discloses an electrodeless discharge lamp having a cylindrical arc tube with a hollow portion as an irradiation space (prior art 2).
[0005]
Prior art 2 describes that a hollow external light source device can be constructed because a hollow portion of a cylindrical arc tube is used as an irradiation space so that irradiation can be performed from the surrounding area with uniform light intensity. Yes.
[0006]
Furthermore, an attempt has been made to sterilize a fluid by immersing an electrodeless discharge lamp equipped with an elongated discharge vessel in a fluid to be treated such as water, that is, by using an internally-illuminated configuration.
[0007]
[Problems to be solved by the invention]
When an electrodeless discharge lamp having an elongated discharge vessel is used for fluid processing, it is more convenient to separate the high-frequency power source from the electrodeless discharge lamp. For this purpose, a coaxial cable is connected between the high-frequency power source and the electrodeless discharge lamp.
[0008]
However, depending on the positional relationship between the impedance matching circuit and the electrodeless discharge lamp, it has been found that the impedance of the excitation coil is affected by the wiring and cannot be matched well. In Prior Art 1, it is stated that the impedance matching circuit is housed in the load side unit, but there is no disclosure about the specific positional relationship and structure between the impedance matching circuit and the electrodeless discharge lamp, and this prior art is applied. However, the above problem cannot be solved.
[0009]
Further, in the prior art 2, since the hollow portion of the cylindrical arc tube is used as the irradiation space, it is a so-called external illumination type and cannot be applied to the internal illumination type fluid treatment. Furthermore, the external illumination type is difficult to increase the amount of processing, and thus is not suitable for medium-scale or larger fluid processing apparatuses.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to provide an electrodeless discharge lamp unit that is suitable for fluid treatment with a relatively large capacity and is easy to handle, an electrodeless discharge lamp device using the same, and a fluid treatment apparatus.
[0011]
[Means for achieving the object]
An electrodeless discharge lamp unit according to a first aspect of the present invention comprises an electrodeless discharge lamp in which a discharge medium is sealed in an elongated discharge vessel; and an electrodeless discharge that is distributed and disposed along the longitudinal direction of the discharge vessel. A plurality of excitation coils for generating a discharge by applying a high-frequency magnetic field to the lamp; an impedance matching circuit disposed substantially coaxially on one end side in the axial direction of the electrodeless discharge lamp and connected to each excitation coil; And an integrated means for integrating the discharge lamp, the excitation coil, and the impedance matching circuit.
[0012]
In the present invention and each of the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.
[0013]
In an electrodeless discharge lamp, an excitation coil is wound around the outside of the discharge vessel to generate a high frequency magnetic field in the axial direction of the discharge vessel to excite the discharge medium. To occur. Therefore, since the vicinity of the axial center of the discharge vessel does not contribute to the discharge, the discharge vessel can be formed hollow in the axial direction. However, in the present invention, a straight tube type discharge vessel can be used if necessary.
[0014]
As the discharge medium, various media necessary for generating a required discharge can be used. For example, when it is desired to generate ultraviolet rays having a wavelength of 235.7 nm by discharge, rare gas such as mercury and argon is sealed in several torr. And discharge conditions are set so that it may become a vapor pressure which becomes low-pressure mercury vapor discharge. However, the present invention is also applicable when generating visible light. It is also applicable to high pressure metal vapor discharge and high pressure gas discharge.
[0015]
A plurality of excitation coils are distributed in the longitudinal direction of the discharge vessel. This is effective in causing a discharge over substantially the entire length of the elongated discharge vessel. Each excitation coil normally has a number of turns of about several turns, but may be one turn if necessary.
[0016]
The impedance matching circuit can be freely configured as long as the required impedance matching can be performed. In general, an impedance matching circuit is configured by housing circuit elements in a case. The impedance matching circuit has an electrodeless discharge lamp unit in which the case is arranged substantially coaxially on one end side in the longitudinal direction of the electrodeless discharge lamp and integrated with the electrodeless discharge lamp and the excitation coil by the integration means. Is configured.
[0017]
Even if the integration means is originally arranged for other purposes, it is the configuration referred to in the present invention, and if it has the effect of integration, it is also interpreted as the integration means. To do. For example, when a protective tube to be described later is added, the end plate of the protective tube can serve as a part of the case of the impedance matching circuit. Further, the integration unit allows the impedance matching circuit to be a fixing unit that integrates the impedance matching circuit at the above position.
[0018]
Thus, in the present invention, since a plurality of excitation coils are dispersedly arranged along the longitudinal direction of the elongated discharge vessel, almost the entire discharge vessel can emit light uniformly, thus increasing the amount of light emission. be able to. At the same time, an impedance matching circuit is arranged almost coaxially at one end of the electrodeless discharge lamp, and the electrodeless discharge lamp, the excitation coil and the impedance matching circuit are integrated by means of integration. An electrodeless discharge lamp that facilitates electrical connection of a circuit and a plurality of excitation coils and mechanical support of an electrodeless discharge lamp unit, and thus can be applied to various fluid processing apparatuses including medium-sized or larger capacity fluid processing apparatuses. Is a unit.
[0019]
An electrodeless discharge lamp unit according to a second aspect of the present invention comprises: an electrodeless discharge lamp in which a discharge medium is enclosed in an elongated discharge vessel; an excitation coil that causes a high frequency magnetic field to act on the electrodeless discharge lamp to generate discharge; A radiation-permeable protective tube with at least the main part that seals and surrounds the periphery of the electrodeless discharge lamp and the coil against the fluid; and is disposed on one end side in the axial direction of the electrodeless discharge lamp and connected to the excitation coil And an integrated means for integrating the electrodeless discharge lamp, the excitation coil, the protective tube, and the impedance matching circuit.
[0020]
In the present invention, one to several excitation coils can be used depending on the axial length of the discharge vessel and the number of turns of the excitation coil.
[0021]
The protection tube protects the electrodeless discharge lamp and the excitation coil from coming into direct contact with the fluid to be treated. For this reason, the protection tube is sealed against the fluid and surrounds the electrodeless discharge lamp and the excitation coil. When the fluid to be processed is a liquid, the seal is liquid-tight. Further, when the fluid to be processed is a gas, the seal is airtight.
[0022]
The fact that at least the main part is radiation transmissive means that the protective tube does not need to be entirely radiant, and when it is desired to transmit radiation from a desired part to a desired direction, the protective tube emits radiation in the desired direction. As long as it is transparent. The phrase “transmitting radiation” may be anything that transmits radiation in a desired wavelength band out of radiation of an electrodeless discharge lamp.
[0023]
The protection tube is generally composed of a radiation-transmitting cylindrical body and an end plate made of metal or synthetic resin that closes both ends of the cylindrical body, and a packing is interposed between the cylindrical body and the end plate. By fixing both, a protective tube sealed against the fluid can be formed. As a configuration different from the above, a metal or synthetic resin end plate may be fixed to the open end of the radiation-transmitting bottomed cylindrical body via a packing.
[0024]
The impedance matching circuit can be arranged and integrated with one end side of the electrodeless discharge lamp by fixing using one end plate of the protective tube. In such a case, it can be said that the end plate of the protective tube and the fixing means for fixing the end plate also serve as the integration means.
[0025]
Thus, in the present invention, since the electrodeless discharge lamp and the excitation coil are surrounded by the protective tube so as not to be in direct contact with the fluid, the following effects are obtained. That is, it is possible to avoid an increase in the parasitic capacitance of the excitation coil by making the diameter of the protective tube sufficiently large. On the other hand, when a fluid with a large relative permittivity is close to the excitation coil, the parasitic capacitance of the excitation coil increases due to the relative permittivity of the fluid, and the concentration, flow rate, and / or flow velocity of the fluid changes. Therefore, the parasitic capacitance due to the fluid is likely to fluctuate. For this reason, since parasitic capacitance of the excitation coil fluctuates and matching is disturbed, it is impossible to supply desired power to the electrodeless discharge lamp through the excitation coil.
[0026]
Further, the excitation coil and the electrodeless discharge lamp do not corrode or malfunction due to contact with the fluid.
[0027]
Furthermore, since the temperature of the electrodeless discharge lamp is not easily influenced by the temperature of the fluid, it can be easily maintained at an appropriate temperature.
[0028]
Furthermore, even if the discharge vessel is broken, it can be avoided that the discharge medium is mixed into the fluid.
[0029]
An electrodeless discharge lamp unit according to a third aspect of the present invention is the electrodeless discharge lamp unit according to the first or second aspect, wherein the electrodeless discharge lamp is characterized in that the discharge vessel is cylindrical.
[0030]
In the present invention, since the discharge vessel is cylindrical and there are few portions that do not contribute to the discharge, it is possible to eliminate wasteful sealing of the discharge medium up to the portion of the discharge vessel that does not contribute to the discharge.
[0031]
An electrodeless discharge lamp unit according to a fourth aspect of the present invention includes a discharge medium sealed in a main portion of a discharge vessel having an elongated cylindrical main portion and a pair of cylindrical portions extending axially from both ends of the main portion. An electrodeless discharge lamp comprising: an excitation coil for generating a discharge by applying a magnetic field to the electrodeless discharge lamp; and surrounding the electrodeless discharge lamp and the excitation coil in a sealed manner against a fluid and a pair of discharge vessels A radiation-permeable protective tube having at least a main portion holding the electrodeless discharge lamp inside through the tube portion; an impedance matching circuit disposed at one end of the protective tube in the axial direction and connected to the excitation coil; It is characterized by having;
[0032]
In the present invention, it is preferable in terms of manufacturability that the cylindrical portion of the discharge vessel is formed of the same material as that of the main portion, and thus is made of a radiation transmitting material. However, they may be made of different materials as long as the coefficients of thermal expansion are approximate.
[0033]
In the present invention, the discharge vessel has a configuration in which a pair of cylindrical portions extend in the axial direction from both ends of the elongated cylindrical main portion, and the electrodeless discharge lamp is held in the protective tube via the cylindrical portion of the discharge vessel. Therefore, the holding | maintenance is easy.
[0034]
Further, the light emitting part of the electrodeless discharge lamp is the main part of the discharge vessel, and since the cylinder part extends from the main part in both end directions, light emission is less likely to be kicked by the cylinder part and the holding means. Therefore, the light emission of the electrodeless discharge lamp can be effectively used for fluid processing.
[0035]
Furthermore, since the cylindrical portion can be concentric with the main portion, the electrodeless discharge lamp can be easily fixed at a desired position with respect to the protective tube, and the holding structure can be simplified.
[0036]
The electrodeless discharge lamp unit of the invention of claim 5 2 The electrodeless discharge lamp unit according to any one of 1 to 4, further comprising a partition wall disposed between the protective tube and the matching circuit.
[0037]
In the present invention, the partition wall makes the impedance matching circuit less susceptible to heat from the electrodeless discharge lamp. The end plate of the protective tube can also be used as the partition wall of the present invention. If the heat capacity is large, the partition may be made of metal. Further, the partition wall may be a synthetic resin having a low thermal conductivity.
[0038]
Thus, in the present invention, since the impedance matching circuit is hardly affected by the heat of the electrodeless discharge lamp by the partition walls, it is easy to stabilize the impedance matching. Further, the impedance matching circuit can be disposed as close to the electrodeless discharge lamp as possible, and the impedance matching circuit is less affected by the wiring.
[0039]
An electrodeless discharge lamp unit according to a sixth aspect of the present invention is the electrodeless discharge lamp unit according to the second or fourth aspect, wherein the impedance matching circuit includes a case having substantially the same diameter as the protective tube. Yes.
[0040]
Since the entire electrodeless discharge lamp unit can have almost the same diameter, the electrodeless discharge lamp unit can be handled easily, and the end plate of the protective tube and the case of the impedance matching circuit can be easily integrated to simplify the structure. Can be planned. Furthermore, the appearance is also improved.
[0041]
An electrodeless discharge lamp unit according to a seventh aspect of the present invention is the electrodeless discharge lamp unit according to any one of the first to sixth aspects, wherein the electrodeless discharge lamp emits ultraviolet rays by discharge.
[0042]
If the electrodeless discharge lamp emits ultraviolet rays, particularly ultraviolet rays having a wavelength of 253.7 nm, it is effective to use this for the sterilization treatment of the fluid. In this case, since the electrodeless discharge lamp does not seal the electrode in the discharge vessel, the electron emitting material of the electrode is not consumed, so that the lifetime is significantly longer than that of the conventional electroded sterilization lamp.
[0043]
Therefore, when this electrodeless discharge lamp apparatus is used for fluid sterilization, its maintenance is easy and inexpensive.
[0044]
An electrodeless discharge lamp device according to an eighth aspect of the present invention includes: an electrodeless discharge lamp unit according to any one of the first to seventh aspects; a high-frequency power source disposed at a position apart from the electrodeless discharge lamp unit; And a coaxial cable connecting the electrode discharge lamp unit and the high-frequency power source.
[0045]
The circuit system is not limited as long as the high-frequency power source can supply power with a frequency of 1 to several hundreds of MHz necessary for lighting the electrodeless discharge lamp. The distance between the high-frequency power source and the electrodeless discharge lamp unit may be a distance that requires a coaxial cable connection between them, and the specific number of distances is not limited. For example, a distance of about 1 to 10 m is sufficiently allowed with a coaxial cable.
[0046]
The coaxial cable may have a connector box or the like interposed therebetween.
[0047]
The application of the electrodeless discharge lamp device is not particularly limited, but fluid treatment is one of the most suitable applications. It can also be used for photochemical reactions. Further, if necessary, it can be used for illumination.
[0048]
A fluid treatment apparatus according to a ninth aspect of the present invention is a treatment tank having a fluid inlet and outlet and at least an electrodeless discharge lamp and an excitation coil disposed in the treatment tank to irradiate the fluid with light. An electrodeless discharge lamp unit according to any one of claims 1 to 7; a high-frequency power source disposed at a position spaced from the electrodeless discharge lamp unit; and a space between the electrodeless discharge lamp unit and the high-frequency power source. And a coaxial cable to be connected.
[0049]
The electrodeless discharge lamp is not limited to ultraviolet radiation because it only needs to be configured to emit radiation having a wavelength necessary for processing.
[0050]
The electrodeless discharge lamp may be irradiated from above the fluid to be treated, or may be immersed in the fluid and so-called external illumination. Furthermore, if necessary, if a cylindrical discharge vessel is provided, a so-called internally-illuminated irradiation may be performed by storing or circulating a fluid in the hollow portion.
[0051]
The treatment tank allows the partition walls and other means to be appropriately adopted as necessary so that all of the fluid flowing therethrough is irradiated with the radiation of the electrodeless discharge lamp without being biased.
[0052]
A fluid treatment apparatus according to a tenth aspect of the present invention includes a treatment tank having a fluid inlet and outlet, and at least an electrodeless discharge lamp and an excitation coil arranged so as to irradiate light close to the fluid in the treatment tank. 8. The impedance matching circuit according to any one of claims 1 to 7, wherein the impedance matching circuit is configured so that a fluctuation of electric power input to the excitation coil generated according to the presence or absence of fluid is within ± 10%. An electrodeless discharge lamp unit; a high-frequency power source disposed at a position separated from the electrodeless discharge lamp unit; and a coaxial cable connecting between the electrodeless discharge lamp unit and the high-frequency power source. It is said.
[0053]
When the electrodeless discharge lamp and / or the excitation coil are close to the fluid to be treated, if the concentration, flow rate or amount of the fluid varies, the relative dielectric constant of the fluid varies as described above. A parasitic capacitance is formed by using a fluid close to the excitation coil as a dielectric. Since this parasitic capacitance affects the impedance matching circuit, the change in relative permittivity changes the degree of impedance matching of the impedance matching circuit. As a result, the required high frequency power is not supplied from the excitation coil to the electrodeless discharge lamp, and the discharge occurs only in a part of the discharge space or the discharge goes off. It may not discharge when it is severe. In any case, the design light output cannot be obtained. As a result, there is a serious problem that the fluid processing becomes poor.
[0054]
For example, when sewage is sterilized using an electrodeless discharge lamp device, it can be sterilized without adding a sterilizing agent, so that the treated water can be discharged into the river as it is, and there is an advantage that there is no adverse effect on the biological system.
[0055]
However, in this case, when a fluid treatment failure as described above occurs, sewage is discharged without being sterilized or in an insufficiently sterilized state, and the environment is contaminated.
[0056]
Therefore, it is necessary to reduce the fluctuation of the electric power supplied to the excitation coil.
[0057]
Thus, in the present invention, since the impedance matching circuit is configured so as not to be affected by the fluctuation of the stray capacitance, the required fluid processing can be ensured even if the relative dielectric constant of the fluid varies. Can do.
[0058]
In the present invention, the fact that the excitation coil is close to the specific processing fluid means that the excitation coil is in direct contact with the fluid or close to the fluid. Therefore, it is effective when the electrodeless discharge lamp and the excitation coil are surrounded by a protective tube with a relatively small gap and immersed in the fluid, or directly immersed in the fluid without using the protective tube. Here, the state where the distance is relatively small refers to the extent to which fluctuations in the relative dielectric constant of the fluid can generally affect the impedance matching circuit.
[0059]
When the electrodeless discharge lamp and the excitation coil are directly immersed in the fluid without using a protective tube, the structure becomes simple and radiation is not absorbed by the incidental mechanism such as the protective tube and the holding means. Therefore, processing efficiency is improved.
[0060]
The fluid treatment apparatus of the invention of claim 11 is arranged so that at least an electrodeless discharge lamp and an excitation coil irradiate light in the vicinity of the fluid in the treatment tank, with a treatment tank having a fluid inlet and outlet. And the impedance matching circuit includes a reactance element having a reactance similar to and sufficiently larger than a reactance of a tree to which the excitation coil belongs and connected in parallel to the excitation coil. An electrodeless discharge lamp unit according to any one of 1 to 7; a high-frequency power source disposed at a position spaced apart from the electrodeless discharge lamp unit; a coaxial cable connecting the electrodeless discharge lamp unit and the high-frequency power source; It is characterized by having;
[0061]
The tree to which the excitation coil belongs refers to a circuit when the excitation coil is viewed from both ends of the excitation coil. In addition, the reactance of the tree is a combined reactance of the excitation coil and stray capacitance at the operating frequency, which is either a conductance or a capacitive reactance. In other words, the operating point in the frequency characteristic of the reactance one-terminal pair circuit is in an inductive or capacitive region. Which reactance is selected can be arbitrarily set in the design of the impedance matching circuit.
[0062]
In the present invention, even if the parasitic capacitance due to the fluid close to the excitation coil varies, the reactance of the reactance element connected in parallel to the excitation coil is large, so that the variation of the reactance of the tree to which the excitation coil belongs can be suppressed small.
[0063]
Therefore, even if the parasitic capacitance due to the fluid fluctuates, the fluctuation of the electric power supplied from the excitation coil to the electrodeless discharge lamp can be reduced to a practical level.
[0064]
A fluid processing apparatus according to a twelfth aspect of the present invention is the fluid processing apparatus according to any one of the ninth to eleventh aspects, further comprising a lifting device that lifts and lowers the electrodeless discharge lamp unit with respect to the processing tank. It is said.
[0065]
The lifting device is used to lift and lower the electrodeless discharge lamp unit when the electrodeless discharge lamp unit is disposed in the processing tank and when it is removed from the processing tank for repair, inspection or replacement. In addition to the configuration that is permanently installed in the treatment tank, a configuration that can be attached and used when necessary, but can be removed at all times is also permitted.
[0066]
One or a plurality of electrodeless discharge lamp units may be connected and moved up and down collectively.
[0067]
Thus, since the present invention includes the lifting device, it is effective when the processing capacity of the electrodeless discharge lamp unit is large and therefore the weight is large.
[0068]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0069]
FIG. 1 is a cross-sectional view showing an embodiment of an electrodeless discharge lamp that can be used in the present invention.
[0070]
In the figure, 1 is a discharge vessel.
[0071]
The discharge vessel 1 includes a cylindrical main portion 1a made of ultraviolet light transmissive glass, and a pair of cylindrical portions 1b extending in the axial direction from both ends of the main portion 1a. In this embodiment, the cylinder part 1b is also comprised with the material same as the main part 1a.
[0072]
An electrodeless discharge lamp 2 is formed in a main portion 1a of the discharge vessel 1 by sealing a discharge medium made of mercury and argon gas.
[0073]
Thus, the electrodeless discharge lamp 2 of the present embodiment mainly emits ultraviolet light having a wavelength of 253.7 nm.
[0074]
FIG. 2 is a conceptual diagram showing a first embodiment of an electrodeless discharge lamp unit and an electrodeless discharge lamp device according to the present invention.
[0075]
In the figure, the same parts as those in FIG. 3 is an electrodeless discharge lamp unit, 4 is a high frequency power source, and 5 is a coaxial cable.
[0076]
The electrodeless discharge lamp unit 3 includes an electrodeless discharge lamp 2, an excitation coil 6, a protective tube 7, and an impedance matching circuit 8.
[0077]
The excitation coils 6 are wound around the main part 1a of the discharge vessel 1 in parallel with six four-turn coils, and are distributed in the length direction of the main part 1a.
[0078]
The protective tube 7 is formed by molding a glass having ultraviolet transparency into a bottomed cylinder, and houses the electrodeless discharge lamp 2 and the excitation coil 6 therein. In this case, the electrodeless discharge lamp 2 is held in the protective tube 7 using a pair of cylindrical portions 1b and 1b extending from both ends of the main portion 1a of the discharge vessel 1. That is, the holding means 7a and 7a are disposed in the protective tube 7, and the cylindrical portion 1b is placed on the holding means 7a, whereby the electrodeless discharge lamp 2 is held in the protective tube 7.
[0079]
The impedance matching circuit 8 is configured by connecting a reactance element inside the case 8a as required. The impedance matching circuit 8 matches the output impedance of the high-frequency power supply 4 and the input impedance of the excitation coil 6 and is integrated with one end of the electrodeless discharge lamp 2 in the axial direction. . In the present embodiment, the upper end plate 7b of the protective tube 7 is used as an integration means. Each excitation coil 6 is connected in parallel to the impedance matching circuit 8.
[0080]
The high-frequency power source 4 is disposed away from the electrodeless discharge lamp 2.
[0081]
The coaxial cable 5 connects between the impedance matching circuit 8 and the high frequency power supply 4.
[0082]
FIG. 3 is a conceptual diagram showing a second embodiment of the electrodeless discharge lamp unit and the electrodeless discharge lamp apparatus of the present invention.
[0083]
In the figure, the same parts as those in FIG.
[0084]
In the present embodiment, a partition wall 7 b ′ is disposed between the protective tube 7 and the impedance matching circuit 8. That is, the partition wall 7 b ′ also serves as a thick metal end plate of the protective tube 4 and a case 8 a of the impedance matching circuit 8, and the impedance matching circuit 8 generates heat generated by the operation of the electrodeless discharge lamp 2. Make it less susceptible.
[0085]
FIG. 4 is a conceptual diagram showing a third embodiment of the electrodeless discharge lamp unit and the electrodeless discharge lamp apparatus of the present invention.
[0086]
In the figure, the same parts as those in FIG.
[0087]
In the present embodiment, the diameter of the impedance matching circuit 8 'is substantially the same as the diameter of the protective tube 7, facilitating the handling of the electrodeless discharge lamp unit, and the end plate of the protective tube is also used as the case of the impedance matching circuit. This is intended to simplify the structure.
[0088]
FIG. 5 is a front view showing a fourth embodiment of the electrodeless discharge lamp unit of the present invention.
[0089]
FIG. 6 is a sectional view of the same.
[0090]
FIG. 7 is also a plan view.
[0091]
In each figure, the same parts as those in FIG.
[0092]
In the present embodiment, the structure of the protective tube 7 and the impedance matching circuit 8 and the holding structure of the electrodeless discharge lamp 2 are made practical.
[0093]
That is, the protective tube 7 abuts a pair of metal end plates 7b and 7b 'via packings 7e on both ends of the ultraviolet light transmissive glass tube 7c, and a plurality of tightening members around the end plates 7b and 7b'. The bolt 7d is inserted and the inside is sealed against the fluid. On the other hand, holding means 7a and 7a 'are provided in advance on the end plates 7b and 7b' inside the protective tube 7, and an electrodeless discharge lamp is placed inside the glass tube 7c before the end plates 7b and 7b 'are tightened. The second cylindrical portion 1b is fitted into one holding means 7a via a cushion 7e, and the other holding means 7a 'itself has a cushioning action, so that it is fitted as it is. When the tightening bolt 7d is tightened, the electrodeless discharge lamp 2 is also held at a predetermined position in the protective tube 7 simultaneously with the attachment of the end plates 7a and 7a ′.
[0094]
It should be noted that six excitation coils 6 having four turns are attached in advance around the electrodeless discharge lamp 2 and lead wires of the excitation coil 6 are connected to the impedance matching circuit 8 through the end plate 7b. .
[0095]
Next, the impedance matching circuit 8 has a case 8a substantially the same diameter as the protective tube 7 and is formed integrally with the end plate 7b, and houses the reactance element 8b therein. The lid 8a1 of the case 8a is fixed to the fixed case 8a with a bolt 8c.
[0096]
The coaxial cable 5 passes through the lid 8a1 of the case 8a and is connected to the reactance element 8b.
[0097]
In the figure, reference numerals 9 and 10 denote fixtures, which are used for attaching the electrodeless discharge lamp unit 3 to a fluid treatment tank.
[0098]
FIG. 8 is a circuit diagram showing a fifth embodiment of the electrodeless discharge lamp unit of the present invention.
[0099]
In the figure, an impedance matching circuit 8 includes an inductor L connected in series with the excitation coil 6 and a capacitor C connected in parallel with the excitation coil 6. ₁ An L-shaped circuit consisting of C _S Is the parasitic capacitance.
[0100]
In this embodiment, the capacitor C ₁ Is the parasitic capacitance C _S It is bigger.
[0101]
Thus, in this embodiment, the capacitor C ₁ Is the parasitic capacitance C _S Is equivalently connected in parallel. Therefore, the parasitic capacitance C _S Capacitor C ₁ Since the capacitance of the capacitor is large, the variation in the capacitance appears to be small as a whole, and impedance matching is not lost.
[0102]
FIG. 9 is a circuit diagram showing a sixth embodiment of the electrodeless discharge lamp unit of the present invention.
[0103]
In the figure, the same parts as those in FIG.
[0104]
In the present embodiment, the configuration of the impedance matching circuit 8 ′ is different from that of FIG. That is, the capacitor C is further connected between the terminals on the high frequency power supply side. ₂ Are connected in parallel.
[0105]
Thus, this embodiment also basically operates in the same manner as in FIG.
[0106]
FIG. 10 is a front view showing a running water sterilization apparatus which is the first embodiment of the fluid treatment apparatus of the present invention.
[0107]
FIG. 11 is also a rear view.
[0108]
FIG. 12 is also a longitudinal sectional view.
[0109]
In the figure, 11 is a treatment tank and 3 is an electrodeless discharge lamp unit.
[0110]
The treatment tank 11 includes an inlet 11a on the back surface and an outlet 11b on the front surface. A flow path changing plate 11c is disposed inside the treatment tank 11 so that water to be treated flows therein. In addition, 11d is a cover of the processing tank 11.
[0111]
The electrodeless discharge lamp unit 3 has the structure shown in FIGS. 5 to 7 and is disposed at a position where fluid flows in the processing tank 11.
[0112]
Then, in FIG. 12, as shown by the arrow from the inlet 11a, the water to be treated that flows into the treatment tank 11 is regulated by the flow path changing plate 11c and first flows downward. After passing through the flow path changing plate 11 c, the air then flows upward and passes around the electrodeless discharge lamp unit 3. And it is discharged | emitted from the outflow port 11b. Meanwhile, the water to be treated is sterilized by being irradiated with ultraviolet rays when passing around the electrodeless discharge unit 3.
[0113]
FIG. 13: is a front view which shows the flowing water sterilizer which is 2nd Embodiment of the fluid processing apparatus of this invention.
[0114]
In the figure, the same parts as those in FIG. 11 and FIG.
[0115]
This embodiment is different from the first embodiment in that it includes a lifting device 12 for the electrodeless discharge lamp unit 3.
[0116]
That is, the lifting device 12 includes a guide rail 12a and a winder 12b. The lifting device 12 is attached to the base 13. The base 13 is fixed on a concrete water tank 14 by fixing means 15. The processing tank 11 is attached to the lower end of the lifting device 12. And the processing tank 11 is fixed in the state in which the inflow port 11a contact | abutted in the inflow port (not shown) of the water tank 14 in the water tank 14. FIG.
[0117]
Three of the electrodeless discharge lamp units 3 are mounted on the support frame 16 and are suspended from the lower end of the wire 12b1 wound around the winder 12b.
[0118]
The support frame 16 is integrally fixed with the lid 11d of the processing tank 11.
[0119]
Then, the water to be treated which flows into the water tank from the inlet of the water tank 14 flows into the processing tank 11 via the inlet 11a of the processing tank 11, and is sterilized by the ultraviolet rays emitted from the electrodeless discharge lamp unit 3. The water is discharged from the outlet 11b into the water tank 14 and stored, or other processing is performed.
[0120]
In order to mount the electrodeless discharge lamp unit 3 in the treatment tank 11, the electrodeless discharge lamp unit 3 is first attached to the support frame 16 while being wound up by the winder 12 b. Next, when the electrodeless discharge lamp unit 3 is lowered by operating the winder 12 b, the winder 12 b is mounted in the treatment tank 11. In addition, if the positioning means 11e is arrange | positioned in the processing tank 11, and the positioning element 16a is arrange | positioned in the support frame 16, positioning will become easy.
[0121]
When the electrodeless discharge lamp unit 3 is pulled up from the processing tank 11 for inspection, repair or replacement, the winder 12b may be operated to move the support frame 16 upward.
[0122]
【The invention's effect】
According to each of the first to seventh aspects of the present invention, the matching circuit is integrated on one end side of the elongated discharge vessel, so that it is suitable for a relatively large capacity fluid processing and is easy to handle. A lamp unit can be provided.
[0123]
According to the invention of claim 1, in addition, an electrodeless discharge lamp unit that emits light over substantially the entire length of the elongated discharge vessel by disposing a plurality of excitation coils dispersed along the longitudinal direction of the discharge vessel. Can be provided.
[0124]
According to the second aspect of the present invention, the electrodeless discharge lamp and the excitation coil are further separated from the fluid to be treated by providing the protective tube sealing the electrodeless discharge lamp and the excitation coil with respect to the fluid. Therefore, it is possible to provide an electrodeless discharge lamp unit in which impedance matching is not disturbed.
[0125]
According to the invention of claim 3, in addition, by using a cylindrical discharge vessel, it is possible to provide an electrodeless discharge lamp unit with no waste in the discharge medium.
[0126]
According to the invention of claim 4, in addition, by using a discharge vessel in which the cylindrical portion extends from both ends of the cylindrical main portion, and holding the electrodeless discharge lamp in the protective tube through the cylindrical portion, the holding is achieved. It is possible to provide an electrodeless discharge lamp unit that is simple and does not easily emit light.
[0127]
According to the invention of claim 5, in addition, by providing a partition wall between the protective tube and the impedance matching circuit, it is possible to provide an electrodeless discharge lamp unit which is not easily affected by the heat generated by the electrodeless discharge lamp. it can.
[0128]
According to the invention of claim 6, in addition, since the impedance matching circuit has a diameter substantially the same as that of the protective tube, an electrodeless discharge lamp unit that is easy to handle and has a simple structure can be provided.
[0129]
According to the seventh aspect of the present invention, it is possible to provide an electrodeless discharge lamp unit that emits ultraviolet rays and is effective in sterilizing a fluid.
[0130]
According to the invention of claim 8, the electrodeless discharge lamp having the effects of claims 1 to 7 which is easy to handle the electrodeless discharge lamp unit because the high-frequency power source is separated from the electrodeless discharge lamp unit. An apparatus can be provided.
[0131]
According to the ninth aspect of the present invention, a fluid processing apparatus having the effects of the first to eighth aspects can be provided.
[0132]
According to the invention of claim 10, in addition, the impedance matching circuit is configured so that the fluctuation of the electric power supplied to the excitation coil generated according to the presence or absence of fluid is within ± 10, so that it is affected by the parasitic capacitance. It is possible to provide a difficult fluid processing apparatus.
[0133]
According to the eleventh aspect of the invention, in addition, by using an impedance matching circuit that is of the same type as the reactance of the tree to which the excitation coil belongs in parallel with the excitation coil and that has a sufficiently large reactance element connected thereto, it is difficult to be affected by parasitic capacitance. A fluid treatment apparatus can be provided.
[0134]
According to the twelfth aspect of the present invention, in addition, by providing a lifting device for the processing tank of the electrodeless discharge lamp unit, it is easy to mount, inspect and replace the electrodeless discharge lamp unit in the processing tank. It is possible to provide a fluid processing apparatus suitable for the above.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an electrodeless discharge lamp that can be used in the present invention.
FIG. 2 is a conceptual diagram showing a first embodiment of an electrodeless discharge lamp unit and an electrodeless discharge lamp device according to the present invention.
FIG. 3 is a conceptual diagram showing a second embodiment of an electrodeless discharge lamp unit and an electrodeless discharge lamp apparatus according to the present invention.
FIG. 4 is a conceptual diagram showing a third embodiment of an electrodeless discharge lamp unit and an electrodeless discharge lamp device according to the present invention.
FIG. 5 is a front view showing a fourth embodiment of the electrodeless discharge lamp unit of the present invention.
FIG. 6 is a sectional view of the same.
FIG. 7 is also a plan view
FIG. 8 is a circuit diagram showing a fifth embodiment of the electrodeless discharge lamp unit of the present invention.
FIG. 9 is a circuit diagram showing a sixth embodiment of the electrodeless discharge lamp unit of the present invention.
FIG. 10 is a front view showing a running water sterilizer that is the first embodiment of the fluid treatment apparatus of the present invention.
FIG. 11 is also a rear view.
FIG. 12 is also a longitudinal sectional view
FIG. 13 is a front view showing a running water sterilizer as a second embodiment of the fluid treatment apparatus of the present invention.
FIG. 14 is a side view of the same.
FIG. 15 is also a plan view
[Explanation of symbols]
1 ... Discharge vessel
1a ... Main part
1b ... Cylinder part
2. Electrodeless discharge lamp
5 ... Coaxial cable
6 ... Excitation coil
7 ... Protection tube
7a ... Holding means
7a '... Holding means
7b ... end plate
7b '... end plate
7c ... Glass tube
7d ... Fastening bolt
8. Impedance matching circuit
8a ... reactance element

Claims (12)

An electrodeless discharge lamp in which a discharge medium is enclosed in an elongated discharge vessel;
A plurality of excitation coils arranged in a distributed manner along the longitudinal direction of the discharge vessel and causing a high frequency magnetic field to act on an electrodeless discharge lamp to cause discharge;
An impedance matching circuit disposed substantially coaxially on one end side in the axial direction of the electrodeless discharge lamp and connected to each excitation coil;
An integrated means for integrating the electrodeless discharge lamp, the excitation coil and the impedance matching circuit;
An electrodeless discharge lamp unit comprising: An electrodeless discharge lamp in which a discharge medium is enclosed in an elongated discharge vessel;
An excitation coil for generating a discharge by applying a high frequency magnetic field to an electrodeless discharge lamp;
An electrodeless discharge lamp and at least a main part that seals and surrounds the periphery of the coil with respect to fluid and a protective tube that is transparent to radiation;
An impedance matching circuit disposed on one end side in the axial direction of the electrodeless discharge lamp and connected to the excitation coil;
An integrated means for integrating the electrodeless discharge lamp, the excitation coil, the protective tube and the impedance matching circuit;
An electrodeless discharge lamp unit comprising: The electrodeless discharge lamp unit according to claim 1 or 2, wherein the electrodeless discharge lamp has a cylindrical discharge vessel. An electrodeless discharge lamp in which a discharge medium is sealed in a main portion of a discharge vessel having an elongated cylindrical main portion and a pair of cylindrical portions extending in the axial direction from both ends of the main portion;
An excitation coil for generating a discharge by applying a magnetic field to an electrodeless discharge lamp;
The surroundings of the electrodeless discharge lamp and the excitation coil are sealed against the fluid, and the electrodeless discharge lamp is held inside through a pair of cylindrical portions of the discharge vessel. A tube;
An impedance matching circuit disposed at one axial end of the protective tube and connected to the excitation coil;
An electrodeless discharge lamp unit comprising: The electrodeless discharge lamp unit according to any one of claims 2 to 4, further comprising a partition wall disposed between the protective tube and the matching circuit. 5. The electrodeless discharge lamp unit according to claim 2, wherein the impedance matching circuit includes a case having substantially the same diameter as the protective tube. The electrodeless discharge lamp unit according to any one of claims 1 to 6, wherein the electrodeless discharge lamp radiates ultraviolet rays by discharge. An electrodeless discharge lamp unit according to any one of claims 1 to 7;
A high-frequency power source disposed at a position separated from the electrodeless discharge lamp unit;
An electrodeless discharge lamp device comprising: a coaxial cable connecting between the electrodeless discharge lamp unit and the high-frequency power source. A treatment tank with a fluid inlet and outlet;
The electrodeless discharge lamp unit according to any one of claims 1 to 7, wherein at least the electrodeless discharge lamp and the excitation coil are disposed in the treatment tank and are treated by irradiating the fluid with light.
A high-frequency power source disposed at a position separated from the electrodeless discharge lamp unit;
And a coaxial cable for connecting between the electrodeless discharge lamp unit and the high-frequency power source. A treatment tank with a fluid inlet and outlet;
At least the electrodeless discharge lamp and the excitation coil are arranged so as to irradiate light in the vicinity of the fluid in the treatment tank, and the fluctuation of the electric power input to the excitation coil depending on the presence or absence of the fluid is ± 10. The electrodeless discharge lamp unit according to any one of claims 1 to 7, wherein the impedance matching circuit is configured so as to be within%.
A high-frequency power source disposed at a position separated from the electrodeless discharge lamp unit;
And a coaxial cable for connecting between the electrodeless discharge lamp unit and the high-frequency power source. A treatment tank with a fluid inlet and outlet;
At least the electrodeless discharge lamp and the excitation coil are arranged to irradiate light close to the fluid in the treatment tank, and the impedance matching circuit is similar to the reactance of the tree to which the excitation coil belongs, and more The electrodeless discharge lamp unit according to any one of claims 1 to 7, comprising a reactance element having a sufficiently large reactance and connected in parallel to the excitation coil;
A high-frequency power source disposed at a position separated from the electrodeless discharge lamp unit;
And a coaxial cable for connecting between the electrodeless discharge lamp unit and the high-frequency power source. The fluid processing apparatus according to claim 9, further comprising a lifting device that lifts and lowers the electrodeless discharge lamp unit with respect to the processing tank.

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