JPH10162791A - Electrodeless discharge lamp, electrodeless discharge lamp lighting device, lighting system, and liquid treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute an inexpensive static-electricity shielding body with its simple structure. SOLUTION: A static-electric shield line 4 is disposed along a turn of a one-turn energizing coil 2 between a discharge tube 1 and the energizing coil 2, and the static-electricity shield line 4 comes into contact with one of a pair of introducing lines 3 supplying a high-frequency current to the energizing coil 2 and has a same potential as one end of the energizing coil. Therefore, an electric force line is generated between both by a potential difference between a potential not to connected to the static-electricity shield line 4 directly and the static-electric shield line 4. This electric force line has a great potential difference between both and close in a distance between both, therefore, a majority thereof obtains an end and start position between both, very few electric force line generated from the energizing coil 2 reaches the discharge tube 1, and an electric field of the energizing coil 2 is shielded with respect to the discharge tube 1 by a static-electricity shield line 4 with its simple shape.

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 having a structure for blocking an electric field generated from an excitation coil from entering a discharge tube, an electrodeless lamp lighting device for lighting the electrodeless discharge lamp, and an electrodeless lamp. The present invention relates to a lighting device and a liquid processing device using the electrodeless discharge lamp.

[0002]

2. Description of the Related Art An electrodeless discharge lamp (for example, an electrodeless HID lamp) comprising a discharge tube (light emitting portion) and an excitation coil wound close to the outer peripheral portion of the discharge tube includes:
For example, as shown in Japanese Patent Publication No. 7-192703: priority number 131544, a device having an electrostatic shield between an excitation coil and a light emitting unit (discharge tube) is known. The electrostatic shield is disposed outside the lamp between the excitation coil and the lamp light emitting unit. According to such a configuration, it is possible to prevent the electric field between the windings of the excitation coil from being electric-field-coupled to the discharge in the arc tube via the lamp arc tube wall during lamp operation (the potential of the discharge portion and the excitation coil). To prevent electric field coupling with a certain portion of the lamp arc tube wall through the lamp arc tube wall), or simply to prevent the electric field between the windings of the excitation coil from being coupled to the discharge, and to simply cause the lamp arc tube wall to couple. Can be prevented.

[0003] This prevents the ionized luminescent substance or electrons in the arc tube from being attracted in the direction of the electric field and exerting an excessive load on the inner wall of the arc tube. This has the effect of preventing an excessive load from being applied to the outer wall of the vehicle. Such an effect is effective in reducing damage to the tube wall of the light emitting section and extending the lamp life. It is also presumed that there is an effect of reducing electric field coupling between the excitation coil and the discharge via the tube wall to improve the performance of the lamp.

However, providing an electrostatic shield between the excitation coil and the light emitting section means that the electric field between the windings of the excitation coil is also used to start the lamp when a ring-shaped discharge is formed in the light emitting section. Since no contribution can be made, there arises a problem that the startability of the electrodeless discharge lamp is deteriorated. In addition, the electrostatic shield provided in the above-described conventional electrodeless discharge lamp is formed by covering a transparent glass cylinder with a thin transparent tin oxide conductive layer by vapor deposition or the like, and the manufacturing cost is high and heavy. There has been a problem that the weight of the electrodeless discharge lamp is increased and the manufacturing cost is increased.

[0005]

As described above, by providing an electrostatic shield between the excitation coil constituting the electrodeless discharge lamp and the discharge tube which is the light emitting section, the excitation is prevented during lamp operation. Preventing the electric field between the windings of the coil from electric field coupling with the discharge in the arc tube through the tube wall of the discharge tube, or preventing the electric field between the windings of the excitation coil from coupling with the discharge, By simply preventing the light from passing through the wall, it is possible to prevent the ionized luminescent substance or electrons in the arc tube from being attracted in the direction of the electric field, thereby preventing an excessive load on the inner wall of the arc tube. An excessive load is prevented from being applied to the outer wall of the light emitting section inside. This has the effect of reducing damage to the wall of the discharge tube and extending the life of the lamp. However, the presence of the electrostatic shield does not allow the electric field between the windings of the excitation coil to contribute to the start of the lamp when a ring-shaped discharge is formed in the discharge tube. There was a problem that it became worse. In addition, the electrostatic shield provided in the above-described conventional electrodeless discharge lamp is formed by covering a transparent glass cylinder with a thin transparent tin oxide conductive layer by vapor deposition or the like, and the manufacturing cost is high and heavy. There has been a problem that the weight of the electrodeless discharge lamp is increased or the manufacturing cost is increased.

Accordingly, the present invention has been made to solve the above-mentioned problems, and has a simple structure, an inexpensive electrostatic shield, and good startability of a lamp. An electrode discharge lamp, an electrodeless discharge lamp lighting device for lighting the electrodeless discharge lamp, an illumination device using the electrodeless discharge lamp lighting device, and a liquid processing device using the electrodeless discharge lamp lighting device. The purpose is.

[0007]

A first aspect of the present invention provides a discharge tube in which a filler is sealed; an excitation coil wound close to an outer peripheral portion of the discharge tube; A linear electrostatic shield line inserted between the discharge tube and the outer periphery of the discharge tube and arranged along the outer periphery of the discharge tube.

[0008] With this configuration, most of the lines of electric force coming out of the excitation coil end at the electrostatic shield line of the same wire as the excitation coil that is disposed close to the excitation coil. The electric field between the lines is shielded by the electrostatic shield line and does not reach the discharge tube. For this reason, the tube wall of the discharge tube is not exposed to a strong electric field, and the tube wall does not wear. The electrostatic shield wire according to the second aspect of the present invention does not have an annular structure that forms a closed circuit.

With this configuration, since the electrostatic shield wire does not have the annular structure that forms the closed circuit, the induced current from the excitation coil does not flow through the electrostatic shield wire, and no power loss occurs.

According to a third aspect of the present invention, in the electrostatic shield line, a cut is formed in the annular structure to prevent the formation of the closed circuit.
In addition, a support member protrudes from the discharge tube, and the support member is fitted into the notch.

With such a configuration, the support member of the discharge tube fits into the cut of the electrostatic shield wire, and the discharge tube is supported by the electrostatic shield wire and is mechanically stabilized.

According to a fourth aspect of the present invention, the electrostatic shield wire has the same potential as one end of the excitation coil.

With such a configuration, a potential difference is generated between the other end of the excitation coil and the electrostatic shield wire.
Most of the lines of electric force coming out of the excitation coil are arranged close to each other and end at an electrostatic shield line having a potential difference, so that the effect of shielding the electric field between the windings of the excitation coil by the electrostatic shield line is increased.

According to a fifth aspect of the present invention, there is provided a discharge tube in which a filling is sealed; an excitation coil wound close to an outer periphery of the discharge tube; and a gap between the excitation coil and the outer periphery of the discharge tube. A plate-shaped inner peripheral side electrostatic shield plate inserted and arranged along the outer peripheral portion of the discharge tube; and a plate-shaped outer peripheral side arranged on the outer peripheral side of the excitation coil so as to surround the excitation coil. An electrostatic shield plate.

With such a configuration, for example, the inner circumferential electrostatic shield plate made of the same material as the excitation coil shields the electric field between the windings inward from the excitation coil, and this electric field does not reach the discharge tube. To do. For example, an outer circumferential electrostatic shield plate made of the same material as the excitation coil shields an electric field between the windings that is directed outward from the excitation coil so that the electric field is not radiated to the outside.

According to a sixth aspect of the present invention, the inner and outer electrostatic shield plates do not have annular structures for forming a closed circuit, and the electrostatic shield plate is the same as one end of the excitation coil. Potential.

With such a configuration, a potential difference is generated between the other end of the excitation coil and the inner and outer electrostatic shield plates, so that the electric field shielding effect of the two electrostatic shield plates increases. Further, since the two electrostatic shield plates do not form a closed circuit, an induced current from the excitation coil does not flow through the two electrostatic shield plates, and no power loss occurs.

According to a seventh aspect of the present invention, a starting thin tube to which a high voltage is applied at the time of starting is added to the discharge tube, and the center of gravity of the excitation coil is shifted from the center of gravity of the discharge tube.

With such a configuration, a phase relationship is created such that the potential of the electrostatic shield wire or the electrostatic shield plate and the potential of the starting capillary become maximum, and the strongest electric field acts on the starting capillary and the discharge tube. And dielectric breakdown easily occurs,
The starting is performed smoothly.

According to an eighth aspect of the present invention, there is provided an electrodeless discharge lamp according to any one of the first to seventh aspects; a high-frequency power supply for supplying a high-frequency current to an excitation coil of the electrodeless discharge lamp; And a high-voltage power supply for applying a high voltage to the starting capillary added to the starting tube.

With this configuration, at the time of starting, a high voltage is applied from the high voltage power supply to the starting thin tube added to the discharge tube to cause dielectric breakdown inside the discharge tube, and a high frequency current is supplied from the high frequency power supply to the excitation coil. Is supplied to turn on the lamp, and thereafter, the lighting of the lamp is continued by the high-frequency current supplied from the high-frequency power supply.

According to a ninth aspect of the present invention, there is provided the electrodeless discharge lamp lighting device according to the eighth aspect; a reflector for reflecting light emitted from the electrodeless discharge lamp of the electrodeless discharge lamp lighting device; A housing for accommodating the high-frequency power supply of the discharge lamp lighting device.

With such a configuration, when the electrodeless discharge lamp of the electrodeless discharge lamp lighting device is turned on and emits light, the light is reflected by the reflector, and the directional light is emitted to the outside.

According to a tenth aspect of the present invention, there is provided the electrodeless discharge lamp lighting device according to the eighth aspect, wherein the electrodeless discharge lamp of the electrodeless discharge lamp lighting device is disposed inside, and water to be treated is flown into the inside. A water pipe.

With this configuration, when the electrodeless discharge lamp of the electrodeless discharge lamp lighting device is lit inside the water pipe, the ultraviolet light emitted from the electrodeless lamp sterilizes the water to be treated flowing inside the water pipe.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the configuration of a first embodiment of an electrodeless discharge lamp according to the present invention. FIG. 1 (A) is a plan view, and FIG. 1 (B) is a sectional view. 1 is a discharge tube in which a filling such as mercury or a rare gas is sealed, 2 is an excitation coil made of a conductor wound around the outer periphery of the discharge tube 1, 3 is an introduction wire connected to both ends of the excitation coil, Reference numeral 4 denotes an electrostatic shield wire disposed between the excitation coil 2 and the outer peripheral portion of the discharge tube 1 and surrounding the outer peripheral portion of the discharge tube 1 substantially one round so as not to form a closed circuit along the excitation coil 2. It is. However, the electrostatic shield wire is not circulated so as not to form an annular closed circuit as shown by G, so that an induction current due to a high-frequency current flowing through the excitation coil 2 does not flow.

Next, the operation of this embodiment will be described. The excitation coil 2 is wound around the discharge tube 1 for about two turns. The excitation coil 2 is supplied with a high-frequency current from a high-frequency power supply (not shown) via a pair of introduction wires 3 continuously drawn from the excitation coil terminals. As a result, a discharge ring is formed inside the discharge tube 1, and a magnetic force from the excitation coil 2 is supplied to the discharge ring, and the discharge tube 1 is turned on.

Here, since the electrostatic shield wire 4 is introduced together with one of the pair of introduction wires 3 of the excitation coil 2, it has the same potential as one terminal of the excitation coil 2. For this reason, in the excitation coil 2, a line of electric force is generated between the excitation coil 2 and the electrostatic shield line 4 due to a potential difference between the electrostatic shield line 4 and the potential on the side not directly connected to the electrostatic shield line 4. Since the electric field lines have a large potential difference between the two potentials, and the distance between the two is short, most of them have an end-start point between them.
The number of lines of electric force from the excitation coil 2 coupled to the discharge ring formed inside the discharge tube 1 is very small, and the lines of electric force generated from the excitation coil 2 are located on the wall of the discharge tube 1 or inside the tube. The discharge ring to be formed is prevented by the electrostatic shield wire 4.

As a result, the ionized light-emitting substance or electrons in the discharge tube 1 are attracted in the direction of the electric field, thereby imposing an excessive load on the inner wall of the discharge tube 1 or causing the strong electric field itself to emit light during the high-temperature exposure. In order not to place an excessive burden on the outer wall of the discharge tube 1, the wall of the discharge tube 1 is not damaged (worn), and the life of the discharge tube 1 is extended.

According to the present embodiment, the electrostatic shield wire 4
Can be shielded from the electric field between the windings of the excitation coil 2 reaching the discharge tube 1 simply by arranging it approximately one turn between the discharge tube 1 and the excitation coil 2. Since it is possible to use a wire having the same conductor as that of the excitation coil 2, it is possible to easily construct the electrodeless discharge lamp with a long life. It can be manufactured lightweight. In addition, since the electrostatic shield wire 4 is not a fragile material such as glass but a mere metal conductive material, it is resistant to mechanical destruction. is there.

Further, since the electrostatic shield wire 4 does not form a closed circuit, an induced current due to a high-frequency current flowing through the excitation coil 2 does not flow through the electrostatic shield wire 4, so that there is no loss and the light emission of the discharge tube 1. The efficiency can be kept good. Further, the electrostatic shield wire is made of a member having a reflectivity of at least 80% or such a member is adhered to the surface to prevent a temperature rise due to radiant heat from the discharge tube 1 during lighting. In addition, it is possible to make it difficult for the electrostatic shield wire to be deformed, and to secure long-term electrical and mechanical reliability.

FIG. 2 is a diagram showing the configuration of a second embodiment of the electrodeless discharge lamp of the present invention, and FIG.
FIG. 1B is a cross-sectional shape diagram. Also in this example, the electrostatic shield wire 4 is arranged between the excitation coil 2 and the outer peripheral portion of the discharge tube 1, and the electrostatic shield wire 4 extends around the outer peripheral portion of the discharge tube 1 along the excitation coil 1 substantially one round. It is surrounded. The electrostatic shield wire 4 is provided with a cut as shown by G so as not to form a closed circuit, so that an induction current due to a high-frequency current flowing through the excitation coil 2 does not flow.

Here, since the electrostatic shield wire 4 is introduced together with one of the pair of introduction wires 3 of the excitation coil 2, it has the same potential as one terminal of the excitation coil 2. Similar to the first embodiment shown in FIG. 1, the electric field between the windings of the excitation coil 2 can be prevented from reaching the discharge tube 1, and the same effect can be obtained. In addition, the position G of the discharge tube 1 is mechanically stabilized by sandwiching the position holding portion 11 provided in the discharge tube 1 at a gap G where the electrostatic shield wire 4 does not make one turn. Can also.

FIG. 3 is a view showing the configuration of a third embodiment of the electrodeless discharge lamp of the present invention, and FIG.
FIG. 1B is a side view. The excitation coil 2 of the present embodiment is formed of a flat plate-shaped conductive member, and the excitation coil 2 is wound close to the outer peripheral portion of the discharge tube 1 for about two turns.
Between the inside of the excitation coil 2 and the outer peripheral surface of the discharge tube 1, a plate-shaped electrostatic shield plate 4 a is disposed so as to surround the outer peripheral surface of the discharge tube 1 over substantially one round. In this case, the flat surface of the electrostatic shield plate 4a is disposed so as to be substantially parallel to the central axis of the excitation coil 2, and is supported by a plurality of support members 5a provided on the inner peripheral side of the excitation coil 2. I have.

On the outer peripheral side of the excitation coil 2, a plate-shaped electrostatic shield plate 4 b is provided around the excitation coil 2 by a plurality of support members 5 b provided on the outer peripheral portion of the excitation coil 2. It is supported and arranged. here,
By forming the support member closest to the end of the excitation coil 2 by a conductive member among the support members 5a and 5b provided for supporting the electrostatic shield plates 4a and 4b on the excitation coil 2, the static electricity can be reduced. The electric shield plates 4a and 4b are
Are set to substantially the same potential as the introduction line 3 of FIG.

Thus, the electrostatic shield plate 4a performs an electrostatic shielding operation for shielding the lines of electric force of the excitation coil 2 from reaching the discharge tube 1, and is similar to the first embodiment shown in FIG. effective. Further, the electrostatic shield plate 4b is
Since it becomes the end point of the electric field lines spreading outward from the outside, there is an effect of shielding the electric field lines leaking from the excitation coil 2 to the outside,
Electric field emission from the excitation coil 2 can be suppressed.

Since the above-described excitation coil 2 can be formed by molding from only one template, at least the electrostatic shield plate 4b provided on the outer periphery of the excitation coil 2 also includes the support member 5b. The electrostatic shield plate 4b can be formed at extremely low cost because it can be formed from the single plate. Further, if the supporting members 5a, 5b of the electrostatic shield plates 4a, 4b are formed integrally with the excitation coil 2, the assemblability of the electrostatic shield plates 4a, 4b is improved, which contributes to the manufacture of the lamp at low cost. However, in such a configuration, since the potentials of the electrostatic shield plates 4a and 4b move away from the potential of the excitation coil 2, the electrostatic shield plates 4a and 4b
, The number of lines of electric force from the excitation coil 2 ending at the end of the lines of electric force is slightly reduced, and the electrostatic shielding effect of the electrostatic shield plates 4a and 4b tends to slightly decrease.

Further, since the electrostatic shield plates 4a and 4b do not form a closed circuit, an induced current due to a high-frequency current flowing through the excitation coil 2 does not flow through the electrostatic shield plates 4a and 4b. The luminous efficiency of the tube 1 can be kept good. Further, the electrostatic shield plates 4a and 4b are
A member having a reflectance of at least 80% or more,
Alternatively, by bringing such a member into close contact with the surface, it is possible to prevent a temperature rise due to radiant heat from the discharge tube 1 during lighting, to make it difficult for the electrostatic shield plates 4a, 4b to be deformed, And mechanical reliability can be ensured.

FIG. 4 is a side view showing the configuration of an embodiment of the electrodeless discharge lamp lighting device of the present invention. Reference numeral 6 denotes a starting thin tube for generating a discharge in the discharge tube 1 by causing a discharge in a string at the time of starting the lamp, 7 denotes an electrode for applying a high voltage to the starting thin tube 6, and 8 denotes a high voltage to the electrode 7. A high-voltage power supply for outputting a voltage, 9 is a high-frequency power supply for supplying a high-frequency current to the excitation coil 2 via the introduction line 3, 10 is an electrodeless discharge lamp in which a starting tube 6 is added to the discharge tube 1, and 11 is a high-voltage discharge lamp Power supply 8
And a phase control circuit for adjusting the output voltage phase of the high-frequency power supply 9. The portion of the excitation coil 2 is the same as that shown in FIG. 3, and has an electrostatic shield plate 4b outside the excitation coil 2 and an electrostatic shield plate 4a inside the excitation coil 2.
(Not shown).

Next, the operation of this embodiment will be described. When the lamp is started, a high voltage is applied to the starting thin tube 6 from the high voltage power supply 8 via the electrode 7. At the same time, a high-frequency current is supplied from the high-frequency power supply 9 through the introduction line 3 to the excitation coil 2.
Supplied to When a high voltage is applied, a string-like discharge is generated in the starting thin tube 6, and this discharge grows and penetrates into the discharge tube 1. As a result, the discharge in the discharge tube 1 grows into a ring discharge, and a magnetic force is efficiently supplied to the ring discharge from the excitation coil 2 to light the discharge tube 1. Discharge tube 1
When is turned on, the application of the high voltage from the high voltage power supply 8 to the electrode 7 is stopped.

Here, the lamp 10 with the starting tubule 6
The center of gravity of the discharge tube is inserted into the excitation coil 2 such that the center of gravity of the discharge tube is shifted from the center of gravity of the excitation coil 2 from the direction in which the side of the starting thin tube 6 is on the HOT side of the excitation coil 2. Also,
An electrostatic shield plate 4b and an electrostatic shield plate 4a (not shown) that shield an electrostatic field generated from the excitation coil 2 are connected to the GND side of the excitation coil 2 on both the inner and outer circumferences.

For this reason, when the phase of the output voltage of the high voltage power supply 8 applied to the starting capillary 6 is 0 degree, the HO of the excitation coil 2
The phase of the terminal voltage on the T side can be 180 degrees, and the potential of the end of the starting capillary 6 and the potential of the inner circumferential electrostatic shield plate 4a (not shown) of the excitation coil 2 are inverted. A large potential difference can be applied to the starting thin tube 6, the discharge in the starting thin tube 6 and the discharge tube 1 grow smoothly, and the startability is improved.

Here, according to the above-described configuration, it is possible to optimize both the positional relationship between the excitation coil 2 and the discharge tube 1 and the timing of supplying power from the excitation coil 2 to the discharge in the discharge tube. That is, the effect of improving the starting in space and time is synergistic, so that the dielectric breakdown in the discharge tube 1 can be easily performed, and the micro discharge after the dielectric breakdown can be easily grown into the ring discharge. The phase of the output voltage of the high-voltage power supply 8 applied to the starting tube 6 and the phase of the terminal voltage on the HOT side of the excitation coil 2 are different from the center of gravity of the discharge tube and the center of gravity of the excitation coil 2 in the excitation coil 2. The adjustment is mainly performed according to the deviation, but a supplementary adjustment may be performed by the phase control circuit 11.

According to this embodiment, the electrostatic field generated from the excitation coil 2 is shielded by the electrostatic shield plate 4a (not shown) inside the excitation coil 2 and the discharge tube 1, the discharge tube 1 is not damaged and the life of the lamp 10 is extended. Further, since the phase difference of the terminal voltage on the HOT side of the excitation coil 2 is adjusted to be maximum to improve the startability of the lamp, the electrostatic field generated from the excitation coil 2 shielded by the electrostatic shield plate 4a. That can contribute to the start-up of the lamp 10
Startability can be obtained. Furthermore, since the electrostatic field radiated outward from the excitation coil 2 is blocked by the electrostatic shield plate 4b outside the excitation coil 2, electric field mode noise can be reduced.

As an electrodeless discharge lamp, FIG.
Is used, the electric field generated from the excitation coil 2 is shielded by the electrostatic shield wire 4 so as not to reach the discharge tube 1, so that the life of the electrodeless discharge lamp can be extended. .

FIG. 5 is a block diagram showing the configuration of one embodiment of the liquid processing apparatus of the present invention. For example, an electrodeless discharge lamp 50 of an electrodeless discharge lamp lighting device having the same configuration as that shown in FIG.
The lead wire 5 connected to the electrodeless discharge lamp 50
1 is drawn out of the water pipe 16 to the outside, and is connected to the high-frequency power supply 9 and the high-voltage power supply 8. Initially, a high voltage is output from the high-voltage power supply 8 to the electrodeless discharge lamp 50 and a high-frequency current is supplied from the high-frequency power supply 9 to the electrodeless discharge lamp 5.
0, the electrodeless discharge lamp 50 is started,
The electrodeless discharge lamp 50 is turned on, and thereafter, the output of the high voltage from the high voltage power supply 8 is stopped. The running water pipe 16 is the water pipe 4
2 and a connection part 41, and a water pipe 42 on the left side in the figure.
Or water flows into the water pipe 16. The water flowing into the flowing water pipe 16 is sterilized by irradiation of ultraviolet rays generated from the electrodeless discharge lamp 50, and the sterilized water flows out of the flowing water pipe 16 to the water pipe 42 on the right side in the figure.

According to the present embodiment, the running water can be stably sterilized for a long time because the electrodeless discharge lamp 50 of the electrodeless discharge lamp lighting device has a long life. The number of maintenances such as replacement of the electrodeless discharge lamp 50 is reduced, so that maintenance of the apparatus can be facilitated and the operation cost of the apparatus can be reduced.

FIG. 6 is a diagram showing the configuration of an embodiment of the lighting apparatus according to the present invention. Base plate 4 as a plate made of heat-resistant plastic or metal in a circular shape
An electrodeless discharge lamp (hereinafter simply referred to as a lamp) 50 is provided at the center of the lower surface of 1 through a socket 46. At the top of the lamp 50, a starting thin tube 6 is provided so as to project therefrom.
The tip of is protruding.

The base of the excitation coil 2 is screwed to the lower surface of the base plate 41, and the excitation coil 2 is wound twice around the outer periphery of the electrodeless lamp 50. The electrodeless lamp 50 and the excitation coil 2 are covered with a cover 42 formed in a hemispherical shape with acrylic resin.
The upper edge of the cover 42 is fixed to the outer peripheral portion of the base plate 41. The cover 42 also functions as a reflector, adjusts the light distribution of the electrodeless lamp 50, and
In addition, it prevents hands from touching the excitation coil 2 and prevents invasion of dust and insects. The base plate 41, the cover 42, and the like constitute a lighting device body.

On the other hand, a mounting board 43 is provided upright on the upper surface of the base plate 41.
Electronic components constituting the electrodeless discharge lamp lighting device shown in FIG. After a high voltage is applied to the electrode (not shown) at the tip of the starting tube 6 of the electrodeless lamp 50 from the above electrodeless discharge lamp lighting device to cause a discharge in the starting tube 6, the excitation coil 2 is turned on. , A high-frequency current is supplied to the discharge lamp 1 of the electrodeless lamp 50. An external radiator 44 radiates heat generated by the electrodeless lamp 50 transmitted through the heat pipe 45 to the outside.

[0051]

As described above, according to the first aspect of the present invention, since the tube wall of the discharge tube is not exposed to a strong electric field and the tube wall does not wear, the life of the discharge tube is prolonged and the lamp life is prolonged. be able to. In addition, since the structure of the electrostatic shield wire is simple, the lamp can be configured at low cost and light weight.

According to the second aspect of the present invention, since the induced current does not flow through the electrostatic shield wire, a decrease in luminous efficiency can be prevented even if an excitation coil having the electrostatic shield wire is used.

According to the third aspect of the present invention, the discharge tube can be mechanically stabilized by supporting the discharge tube with the electrostatic shield wire.

According to the fourth aspect of the present invention, the effect of shielding the electric field by the electrostatic shield wire for the discharge tube can be increased.

According to the fifth aspect of the present invention, the electric field reaching the discharge tube can be shielded by the inner peripheral side electrostatic shield plate, so that the lamp life can be prolonged. , And the electric field mode noise can be reduced. In addition, since the structure of the electrostatic shield wire is simple, the lamp can be configured at low cost and light weight.

According to the invention of claim 6, the electric field shielding effect of the inner and outer electrostatic shield plates can be increased, and the induced current does not flow through both the electrostatic shield plates, thereby lowering the luminous efficiency. Can be prevented.

According to the seventh aspect of the present invention, even if an excitation coil provided with an electrostatic shield wire or an electrostatic shield plate is used, a good start of the electrodeless discharge lamp can be performed.

According to the eighth aspect of the present invention, since the electrodeless discharge lamp of the electrodeless discharge lamp lighting device has a long life, the number of times of lamp replacement can be reduced, and the maintainability can be improved. .

According to the ninth aspect of the present invention, since the life of the electrodeless discharge lamp is prolonged, the number of times of lamp replacement can be reduced, and the maintenance burden can be reduced.

According to the tenth aspect of the present invention, since the life of the electrodeless discharge lamp is extended, sterilization of the water to be treated by the lamp can be stably performed for a long time.
The number of lamp replacements in the water pipe can be reduced,
The maintenance burden can be reduced.

[Brief description of the drawings]

FIGS. 1A and 1B are a plan view and a sectional view showing a configuration of a first embodiment of an electrodeless discharge lamp of the present invention.

FIG. 2 is a plan view and a sectional view showing the configuration of a second embodiment of the electrodeless discharge lamp of the present invention.

FIG. 3 is a plan view and a side view showing a configuration of a third embodiment of the electrodeless discharge lamp of the present invention.

FIG. 4 is a side view showing the configuration of an embodiment of the electrodeless discharge lamp lighting device of the present invention.

FIG. 5 is a block diagram showing a configuration of an embodiment of the liquid processing apparatus of the present invention.

FIG. 6 is a diagram showing a configuration of an embodiment of a lighting device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge tube 2 Excitation coil 3 Introductory wire 4 Electrostatic shield wire 4a, 4b Electrostatic shield plate 5a, 5b Support member 6 Starting tube 7 Electrode 8 High voltage power supply 9 High frequency power supply 10 Electrodeless discharge lamp (lamp) 11 Position holding Part 16 Running water pipe 42 Cover

Claims (10)

[Claims] A discharge tube having a filling filled therein; an excitation coil wound close to an outer periphery of the discharge tube; and an discharge coil inserted between the excitation coil and the outer periphery of the discharge tube. A linear electrostatic shield line disposed along the outer periphery of the tube;
An electrodeless discharge lamp comprising: 2. The electrodeless discharge lamp according to claim 1, wherein said electrostatic shield wire does not have an annular structure forming a closed circuit. 3. The electrostatic shield wire is provided with a notch in the annular structure for preventing the formation of the closed circuit, and a support member is protruded from the discharge tube, and the support member is fitted into the notch. The electrodeless discharge lamp according to claim 2, wherein: 4. The electrodeless discharge lamp according to claim 1, wherein said electrostatic shield wire has the same potential as one end of said excitation coil. 5. A discharge tube enclosing a filling material; an excitation coil wound close to an outer periphery of the discharge tube; and an discharge coil inserted between the excitation coil and the outer periphery of the discharge tube. A plate-shaped inner electrostatic shield plate disposed along the outer peripheral portion of the tube; and a plate-shaped outer electrostatic shield plate disposed on the outer peripheral side of the excitation coil so as to surround the excitation coil. An electrodeless discharge lamp comprising: 6. The inner peripheral side and outer peripheral side electrostatic shield plates do not each have an annular structure forming a closed circuit, and the electrostatic shield plate has the same potential as one end of the excitation coil. The electrodeless discharge lamp according to claim 5, wherein: 7. The discharge tube according to claim 1, wherein a starting thin tube to which a high voltage is applied at the time of starting is added, and a center of gravity of said excitation coil is shifted from a center of gravity of said discharge tube. 7. An electrodeless discharge lamp according to any one of claims 6 to 6. 8. An electrodeless discharge lamp according to claim 1, a high-frequency power supply for supplying a high-frequency current to an excitation coil of the electrodeless discharge lamp, and a starting added to the discharge tube at the time of starting. And a high-voltage power supply for applying a high voltage to the thin tube. 9. The electrodeless discharge lamp lighting device according to claim 8, a reflector for reflecting light emitted from the electrodeless discharge lamp of the electrodeless discharge lamp lighting device, and an electrodeless discharge lamp lighting device. A housing for accommodating a high-frequency power supply; 10. The electrodeless discharge lamp lighting device according to claim 8, and a flowing water pipe in which the electrodeless discharge lamp of the electrodeless discharge lamp lighting device is disposed and in which water to be treated flows. A liquid processing apparatus, comprising: