JP2000223081A - Electrodeless discharge lamp and ultraviolet ray irradiating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp and an ultraviolet ray irradiating device capable of suppressing deformation of an inductively coupled coil caused by a mechanical vibration and heat produced during lighting of a lamp. SOLUTION: A coil-fixing connecting rod 21 having a length almost equal to the length of an arc tube 1 is provided between two conductive wires 31 and 32 of this electrodeless discharge lamp 20, and each inductively coupled coil is mechanically connected to the coil-fixing connecting rod 21 through a coil-fixing piece. Deformation of each inductively coupled coil is suppressed, even if it receives a mechanical impact and it swells by heat produced during lighting of the lamp, by fixing each inductively coupled coil by the coil-fixing connecting rod 21 and the coil-fixing piece.

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 comprising an arc tube, a plurality of inductive coupling coils wound around the arc tube, and two conductive wires connected to the inductive coupling coil. And an ultraviolet irradiation apparatus using the electrodeless discharge lamp.

[0002]

2. Description of the Related Art FIG. 20 is a perspective view showing the structure of an electrodeless discharge lamp used in a conventional ultraviolet irradiation apparatus.
FIG. 21 is a wiring diagram thereof. As shown in these figures,
A conventional electrodeless discharge lamp 10 includes an arc tube 1 having a sealed discharge space, and, for example, six inductively coupled coils 2 ₁ , 2 wound around the outer wall of the arc tube 1 and transmitting energy to the discharge space. _2, ..., and 2 _6, the inductive coupling coil 2 ₁ of this six, 2 _2, ..., 2 and conductive lines 3 _1, 3 ₂ are connected to each ends of 2 _6, a plurality of the light emission tube 1 inductive coupling coil 2 _1, 2 _2, ..., 2 ₆ and the protective tube 4 for accommodating constituted by a holder 5 _1, 5 ₂ supporting both ends of the arc tube 1.

The two conductive lines 3 ₁ and 3 ₂ are connected to a matching circuit 6 (see FIG. 20), and are supplied from a power supply (not shown) via the matching circuit 6 to, for example, 13.56 MHz ± 7 kHz.
When a high frequency power of z is supplied, a discharge phenomenon occurs in the arc tube 1 and ultraviolet rays are emitted. FIG. 22 shows a connection relationship between the equivalent circuit of the electrodeless discharge lamp 10 and the matching circuit 6. The matching circuit 6 has a circuit configuration in which a capacitor Cs is inserted in series with the electrodeless discharge lamp 10 and a capacitor Cp is inserted in parallel. These capacitors Cs, the value of Cp is inductive coupling coil 2 ₁ of initial use, 2 _2, ..., is set corresponding to the impedance of 2 _6.

[0004]

However, the above-mentioned conventional electrodeless discharge lamp has the following problems. The constant of the matching circuit 6 is set in accordance with the impedance of the inductive coupling coil 2 at the beginning of lamp use. However, if the inductive coupling coil 2 receives mechanical vibration or thermally expands due to heat generated when the lamp is turned on, FIG. As shown in (b), the pitch (L) and the distance (D) from the arc tube 1 change, and the impedance changes. As a result, the matching cannot be performed with the constant of the matching circuit 6, and the lamp is not turned on or turned off, and the power supplied to the lamp is reduced. FIG. 23A shows a state where the pitch (L) and the distance (D) between the inductive coupling coil 2 and the arc tube 1 do not change.

The deformation of the inductive coupling coil 2 due to heat generated when the lamp is turned on is not limited to the case described above.
As shown in FIG. 25, there may be a case where two conductive lines 3 are deformed. In this case, the conductive wire as shown in FIG. 25 3 _1, 3
The upper interval of ₂ is D + △ d, and the lower interval is D− △.
d, the position of the lead wire of the inductive coupling coil 2 becomes
As shown in FIG. 26, from L before energization to L + △ after energization.
l, L- △ l.

As shown in FIG. 21, since the wirings for the two conductive wires 3 of the plurality of inductive coupling coils 2 are all the same, the same value is applied to both the positive and negative poles of the high frequency power. Since no power is supplied to the arc tube 1, the light emission of the lamp flickers.

[0007] Copper or an alloy thereof is used as a material for the plurality of inductive coupling coils 2 and the two conductive wires 3, but since these wires are bare wires, they react with oxygen in the air. Oxidizes easily and rusts, affecting the life of the lamp.

The arc tube 1 of the electrodeless discharge lamp 10 includes
An exhaust pipe (not shown) for holding mercury that controls the discharge in the arc tube is provided. It is known that the emission intensity becomes maximum when the temperature around the mercury in the exhaust pipe is around 40 degrees. I have. However, in the case of using a plurality of electrodeless discharge lamps 10 and arranging them in a direction perpendicular to the water surface (for example, see FIG. 14), such as an ultraviolet irradiation device of a sewage treatment facility (see FIG. Degree)
As a result, the temperature around the electrodeless discharge lamp 10 becomes higher as it comes closer to the water surface, so that the temperature around the exhaust pipe of each of the electrodeless discharge lamps 10 is not constant. The emission intensity of the discharge lamp 10 varies.

Accordingly, the present invention can suppress a change in the shape of the inductive coupling coil due to mechanical vibration or heat generated when the lamp is turned on, and the inductive coupling coil and the conductive wire are less likely to rust.
It is another object of the present invention to provide an electrodeless discharge lamp and an ultraviolet irradiation device that can prevent variations in emission intensity even when there is a difference in temperature in the surrounding atmosphere.

[0010]

According to the first aspect of the present invention,
An arc tube having a sealed discharge space; a plurality of inductive coupling coils wound around the outer wall surface of the arc tube and transmitting energy to the discharge space; connected to both ends of the plurality of inductive coupling coils An electrodeless discharge lamp comprising: two conductive wires; and a protective tube that houses the arc tube and a plurality of inductive coupling coils; a coil fixing member that fixes each of the plurality of inductive coupling coils; It is characterized by having.

According to this configuration, since each of the plurality of inductive coupling coils is fixed by the coil fixing member, the inductive coupling coil can be fixed even if it receives a mechanical shock or expands due to heat generated when the lamp is turned on. Each deformation is suppressed. Therefore, the impedance does not change even if a plurality of inductive coupling coils receive a mechanical shock or heat generated when the lamp is turned on. There is no lighting, extinguishing, or reduction in the power input to the lamp.

The coil fixing member includes, for example, a coil fixing connecting rod having substantially the same length as the arc tube or being folded to have a length approximately twice as long as the arc tube; And a plurality of coil fixing pieces for mechanically connecting the coils. The number of connecting rods for fixing the coil is not limited to one, and a plurality of connecting rods may be provided. By providing a plurality of the coil fixing connecting rods, each of the inductive coupling coils can be more firmly fixed. In this case, it goes without saying that coil fixing pieces are provided for the number of coil fixing connecting rods.

According to a fourth aspect of the present invention, there is provided an arc tube having a sealed discharge space; wound around an outer wall surface of the arc tube;
A plurality of inductive coupling coils for transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; and a housing for the arc tube and the plurality of inductive coupling coils. An electrodeless discharge lamp comprising: a protective tube; and a conductive wire fixing member that mechanically couples a part of each of the two conductive wires and fixes them.

According to this configuration, since each of the two conductive wires is fixed by the conductive wire fixing member, the deformation of each conductive wire is suppressed even by heat generated when the lamp is turned on. Therefore, since the plurality of inductive coupling coils are not affected by each conductive wire due to heat generated when the lamp is turned on, there is no change in impedance due to the influence, and even if the impedance is changed, the degree is small. In addition, the lamp does not turn on or turn off, and the power supplied to the lamp does not decrease.

The number of conductive wire fixing members is not limited to one, and a plurality of conductive wire fixing members may be provided. By providing a plurality of the conductive wire fixing members, each conductive wire can be more firmly fixed.

According to a sixth aspect of the present invention, there is provided an arc tube having a sealed discharge space;
A plurality of inductive coupling coils for transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; and a housing for the arc tube and the plurality of inductive coupling coils. An electrodeless discharge lamp comprising: a protective tube; and a conductive wire fixing member for mechanically connecting all parts of each of the two conductive wires and fixing them.

According to this configuration, all the respective portions of the two conductive wires are fixed by the conductive wire fixing member.
Deformation of each conductive wire is also suppressed by heat generated when the lamp is turned on. Therefore, since the plurality of inductive coupling coils are not affected by each conductive wire due to heat generated when the lamp is turned on, there is no change in impedance due to the influence.
Even if it changes, the degree of change is slight, so that the lamp does not turn off, goes out, and the power supplied to the lamp does not decrease.

According to a seventh aspect of the present invention, there is provided an arc tube having a sealed discharge space;
A plurality of inductive coupling coils for transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; and a housing for the arc tube and the plurality of inductive coupling coils. An electrodeless discharge lamp comprising: a protective tube; mechanically connecting and fixing a part of each of the two conductive wires, and connecting at least one of the plurality of inductively-coupled coils. Conductive wire to be fixed /
It is characterized by comprising an inductive coupling coil fixing member.

According to this structure, each of the two conductive wires is fixed by the conductive wire / inductive coupling coil fixing member, and at least one of the plurality of inductive coupling coils is fixed. Deformation of each conductive wire and the fixed inductive coupling coil is also suppressed by heat generated during lighting. Therefore, the plurality of inductive coupling coils are not affected by each conductive wire due to heat generated when the lamp is turned on, and the fixed inductive coupled coils are suppressed from being deformed due to heat generated when the lamp is turned on. Since there is no change in the impedance, and even if the change is slight, the lamp does not turn off or go out, and the power supplied to the lamp does not decrease.

The number of the conductive wire / inductive coupling coil fixing members is not limited to one, and a plurality of members may be provided. By providing a plurality of the conductive wire / inductive coupling coil fixing members, each of the inductive coupling coils and each of the conductive wires can be more firmly fixed.

According to a ninth aspect of the present invention, there is provided an arc tube having a sealed discharge space;
A plurality of inductive coupling coils for transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; and a housing for the arc tube and the plurality of inductive coupling coils. An electrodeless discharge lamp comprising: a protective tube; and mechanically connecting and fixing all parts of each of the two conductive wires, and at least one of the plurality of inductively coupled coils. A conductive wire / inductive coupling coil fixing member for fixing the two.

According to this structure, all the portions of each of the two conductive wires are fixed by the conductive wire / inductive coupling coil fixing member, and at least one of the plurality of inductive coupling coils is fixed. Also, the deformation of each conductive wire and the fixed inductive coupling coil can be suppressed even by the heat generated when the lamp is turned on. Therefore, the plurality of inductive coupling coils
There is no change in impedance because there is no influence from each conductive wire due to heat generated when the lamp is turned on, and the fixed inductive coupling coil suppresses changes in shape due to heat generated when the lamp is turned on. Since the degree of the change is slight, the lamp does not turn off or go out, and the power supplied to the lamp does not decrease.

According to a tenth aspect of the present invention, while the resistance of the line of the two conductive wires increases as the distance from the power supply side increases, the power supplied to the arc tube from each of the plurality of inductive coupling coils. , The winding width of the plurality of inductive coupling coils is reduced as the distance from the power supply side increases.

According to this configuration, since the winding width of the plurality of inductive coupling coils decreases as the distance from the power supply side increases, the resistance of the two conductive lines increases as the distance from the power supply side increases. In contrast, the power supplied to the arc tube from each of the plurality of inductive coupling coils can be made uniform. Thereby, the light emission intensity of the arc tube becomes uniform as a whole.

According to an eleventh aspect of the present invention, the wiring for each of the two conductive lines of each of the plurality of inductive coupling coils is alternately or alternately reversed every few wires. According to this configuration, the wirings for the two conductive wires of the plurality of inductive coupling coils are alternately or alternately reversed every few wires, so that substantially the same power is supplied to the positive and negative poles of the supplied high-frequency power. Can be supplied to the arc tube. Thereby, the flickering of the light emission of the lamp hardly occurs.

According to a twelfth aspect of the present invention, the material of the plurality of inductive coupling coils and the two conductive wires is aluminum or an alloy thereof. When the material of the inductive coupling coil and the conductive wire is aluminum or its alloy, the oxidation rate is slower than that of conventionally used copper or its alloy, and the life can be extended accordingly.

A thirteenth aspect of the present invention is directed to an arc tube having a sealed discharge space; an exhaust tube provided in communication with the arc tube to hold mercury for controlling discharge in the arc tube; A plurality of inductive coupling coils wound around the outside of the tube and transmitting energy to the discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils;
An electrodeless discharge lamp, comprising: a protective tube that houses the arc tube and a plurality of inductive coupling coils; and a cap that is attached to at least a side of the arc tube on which the exhaust tube is provided. An exhaust pipe is provided at one end of the arc tube in the same direction as the longitudinal direction of the arc tube and eccentric from the center axis of the arc tube, and the cap accommodates a tip portion of the exhaust tube, A cooling fin having a concentric concave portion with respect to the cap is provided.

According to this configuration, the exhaust pipe can be arranged at any position of the concave portion of the cooling fin. Therefore, for example, a plurality of electrodeless discharge lamps are used as in an ultraviolet irradiation device of a sewage treatment facility. Even when disposing them vertically in the water surface, even by disposing the exhaust pipe away from the water surface as it gets closer to the water surface, the temperature around the mercury in the exhaust pipe can be adjusted, As a result, it is possible to suppress variations in the luminous intensity of each of the electrodeless discharge lamps. As a result, efficient irradiation becomes possible.

According to the fourteenth aspect of the present invention, since the electrodeless discharge lamp of the above invention is used, a highly reliable and high performance ultraviolet irradiation apparatus can be provided.

[0030]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electrodeless discharge lamp and an ultraviolet irradiation apparatus according to the present invention. (I) First Embodiment FIG. 1 is a perspective view showing the structure of a first embodiment of an electrodeless discharge lamp according to the present invention. In this figure,
Parts common to those in FIG. 20 described above are denoted by the same reference numerals. As shown in FIG. 1, this first embodiment of the electrodeless discharge lamp 20, two conductor lines 3 _1, 3 substantially equal to the length of the arc tube 1 between _two lengths of the coil fixing Connecting rod 2
1 is provided. In this case, the connecting rod 2 for fixing the coil
1 at both ends are fixed to the holder 5 _1, 5 _2. The coil fixing connecting rod 21, as shown in the wiring diagram of Figure 2, each inductive coupling coil 2 _1, 2 _2, ..., 2 ₆ and the coil fixing piece 22 mechanically connecting is provided. For connection between the coil fixing piece 22 and the inductive coupling coil 2, for example, a screw 50 is used as shown in FIG. The connecting rod 21 for coil fixing and the coil fixing piece 22 constitute a coil fixing member.

[0031] Thus, each inductive coupling coil 2 ₁ using a coil fixing connecting rods 21, ₂ 2, ..., 2 ₆ by fixing the respective inductive coupling coil 2 _{1, 2} 2, ..., 2 ₆ There or subjected to mechanical shock, even or thermally expanded by the heating during lamp operation, the inductive coupling coil 2 _1, 2 _2, ..., 2 ₆ the deformation of the respective is suppressed. As a result, the impedance of each of the inductive coupling coils 2 ₁ , 2 ₂ ,..., ₂₆ does not change, and even if it does change, the degree is slight. There is no reduction in input power.

It is to be noted that not only one coil fixing connecting rod 21 but also a plurality of coils as shown in FIG.
More firmly each inductive coupling coil 2 _1, 2 _2, ..., can be fixed to 2 _6. In this case, the connecting rod 2 for fixing the coil
Needless to say, only one coil fixing piece 22 is provided. Further, a screw 50 is used for connection with the inductive coupling coil 2.
5, a coil fixing piece 23 of a type that is crimped to the inductive coupling coil 2 may be used as shown in FIG. 5, for example.

On the other hand, the inductive coupling coils 2 ₁ , 2 ₂ ,.
Alternating _6, the light emitting tube 1, so that it can supply the same power in the positive and negative electrodes of the high-frequency power, inductive coupling coil 2 _1, 2 _2, ..., 2 ₆ of the conductive wire 3 _1, 3 wiring for ₂ The opposite is true. For example, as shown in FIG. 2, the conductive coupling coil 2 _1, one end of the conductive wire 3
_1, whereas the other end is connected to the conductor line 3 _2, the electrically coupling coil 2 ₂ adjacent thereto, is connected at one end thereof to the conductor line 3 _2, the other end is connected to the conductor line 3 ₁ You. in this way,
Inductive coupling coil 2 _{1, 2} 2, ..., the conductive wire 3 of 2 _{6 1,} 3
By alternately reversing the wiring for _{2, the} same power can be supplied to the arc tube 1 for both the positive and negative poles of the high-frequency power, and the light emission of the lamp hardly flickers. It is not always necessary to change the connection alternately. For example, the connection may be changed every two.

(II) Second Embodiment FIG. 6 is a perspective view showing the structure of an electrodeless discharge lamp according to a second embodiment of the present invention. In this figure, the same reference numerals are given to the parts common to FIG. 20 described above. As shown in FIG. 6, this second embodiment of the electrodeless discharge lamp 24, two conductor lines 3 _1, 3 ₂ of each of the portions by mechanically coupling the conductive wire to fix them A fixing block (conductive wire fixing member) 25 is provided. The conductive wire fixing block 25 with a by fixing the portion of each of the conductive wire 3 _1, 3 _2, deformation due to heat generated during lamp operation is suppressed. Thus, the inductive coupling coils 2 ₁ , 2 ₂ ,..., ₂₆ are not affected by each conductive wire due to heat generated when the lamp is turned on.
Since there is no change in impedance due to the influence, and even if the change is slight, the lamp does not turn off or go out and the power supplied to the lamp does not decrease.

The conductive wire fixing block 25 shown in FIG. 6 has an H-shaped cross section as shown in FIG. 7B, but has a rectangular cross section as shown in FIG. 7 (c), an E-shaped cross section as shown in FIG. 7 (d), or FIG. 7 (e) as shown in FIG. 7 (e). The shape shown in (d) may be a shape in which the lower surface is closed. And each,
Conductive wire 3 ₁ by means of screws 50 as shown, 3 connects _2. Thus, since to secure the two conductive lines 3 _1, 3 ₂ of a portion of each the conductive wire fixing block 25, the conductive wire 3 ₁ due to heat generated during lamp lighting, 3 _second variant is suppressed. Thereby, the inductive coupling coils 2 ₁ , 2
₂ ,..., ₂₆ are each conductive wire 3 due to heat generated when the lamp is turned on.
_1, 3 since there is no influence from _2, no change in impedance, even since even after changing the extent is small, non-lighting of the lamp, extinguishing, reduction in input power to the lamp is caused Never.

By providing not only one but also a plurality of conductive wire fixing blocks 25, each conductive wire 3
₁ and 3 ₂ can be fixed. Further, the conductive wire fixing block 25 fixes a part of each of the conductive wires 3 ₁ and 3 ₂ , but may fix all the portions of each of the two conductive wires. By doing this,
Each conductive wire 3 ₁ due to heat generated during lamp lighting, 3 ₂ of the deformation can be further suppressed strongly.

Further, the conductive wire fixing block 25 is one in which to fix the conductive wire 3 _1, 3 ₂ each, at the same time inductively coupled coil 2 _1, 2 _2, ..., as 2 ₆ can be fixed, For example, as shown in FIG. 8, a coil fixing piece 26 may be provided. In this case, since the number of inductive coupling coils 2 that can be fixed is limited depending on the size of the conductive wire fixing block 25, the size of the conductive wire fixing block 25 may be determined as necessary. The conductive wire fixing block 25 provided with the coil fixing piece 26 corresponds to a conductive wire / inductive coupling coil fixing member. In addition, the conductive wire / inductive coupling coil fixing member is not limited to one, and a plurality of members may be provided. By providing a plurality of them, the inductive coupling coils 2 ₁ , 2 ₂ ,..., ₂₆ and the conductive wires 3 ₁ , 3 ₂ can be more firmly fixed.

(III) Third Embodiment FIG. 9 is a wiring diagram of an electrodeless discharge lamp according to a third embodiment of the present invention. In the electrodeless discharge lamp 27 of the third embodiment, the inductive coupling coils 2 ₁ , 2 ₂ ,... Respond to the phenomenon that the resistance of the lines of the conductive wires 3 ₁ , 3 ₂ increases as the distance from the power supply side increases. Arc tube 1 from each of ₂₆
All so that uniform power supplied to the inductive coupling coil 2 _{1, 2} 2, ..., the winding width l ₁ of 2 _6, l _2, l _3, l
₄ is obtained by the l _5, shorter in distance of l ₆ from the power supply side _{(l 1> l 2> l} 3> l 4> l 5> l 6) so as.

That is, this was made because it was observed that, in the tube axis direction of the arc tube 1, the end portion on the matching circuit side tends to have a lower UV output than the other end side. is there. FIG. 10 is an electrical equivalent circuit of the conductive wire and the inductive coupling coil, and L ₁ , L ₂ , L ₃ , L ₄ ,
L _5, L ₆ is inductively coupled coil 2 _{1, 2} 2, ..., an inductance of 2 _6. Each inductive coupling coil 2 ₁ , 2 ₂ ,
..., so that the resistance of the conductive wire 3 _1, 3 ₂ line is added to the 2 _6. Conductive wire 3 is, for example, inductive coupling coil 2 _1
1, 3 are subject to resistance 2r of _second line, the inductive coupling coil 2 ₆ conductive lines 3 _1, 3 ₂ of line resistor 12r is added. By reducing the inductance of the inductive coupling coils 2 ₁ , 2 ₂ ,..., ₂₆ (ie, increasing the winding width (sparsely winding)) as the resistance value of the lines of the conductive wires 3 ₁ , 3 ₂ becomes smaller. , ₂₆ have the same value of the power supplied to the arc tube 1 from the inductive coupling coils 2 ₁ , 2 ₂ ,. It is presumed that the light emission intensity of the light emitting tube 1 can be made uniform as a whole.

(IV) Fourth Embodiment The structure of the electrodeless discharge lamp of the fourth embodiment is the same as that of the electrodeless discharge lamp 2 of the first to third embodiments described above.
The figures are omitted because they are the same as 0, 24, and 27. The difference, inductive coupling coil 2 _1, 2 _2, ..., lies in using aluminum or its alloys as 2 ₆ and the conductive wire 3 _1, 3 ₂ of the material. By using aluminum or its alloy, the oxidation rate is slower than that of copper or its alloy, and the life can be extended correspondingly.

FIG. 11 shows inductive coupling coils 2 ₁ , 2
_2, ..., a visual test results of oxidation conditions by the case of using in the case of using 2 ₆ and the conductive wire 3 _1, 3 ₂ copper or an alloy thereof, aluminum or alloys thereof. As shown in this figure, when copper or an alloy thereof was used, blackening was confirmed in 100 hours, and peeling of the surface coating was confirmed in 300 hours. On the other hand, when aluminum or its alloy was used, no change in the surface could be confirmed even after 700 hours.

(V) Fifth Embodiment FIG. 12 is a perspective view showing the structure of an electrodeless discharge lamp according to a fifth embodiment of the present invention. In this figure, the same reference numerals are given to the parts common to FIG. 20 described above. Electrodeless discharge lamp 28 of the fifth embodiment
Displaces an exhaust pipe 29 for holding mercury 30 that controls discharge in the arc tube 1 at one end of the arc tube 1 in the same direction as the longitudinal direction of the arc tube 1 and from the center axis of the arc tube 1. On the other hand, a cooling fin 32 that accommodates the distal end portion of the exhaust pipe 29 in a cap 31 that supports the end of the arc tube 1 on which the exhaust pipe 29 is provided, and that has a concentric recess 32 </ b> A with respect to the cap 31. Is provided.

FIG. 13A is a front view of the cap 31, and FIG. 13B is a cross-sectional view taken along the line II of FIG. By attaching the cap 31 to the arc tube 1, the distal end portion of the exhaust tube 29 is housed in the recess 32 </ b> A of the cooling fin 32. The length of the exhaust pipe 29 is determined so that the temperature around the mercury 30 due to the heat from the arc tube 1 when the lamp emits light is close to 40 degrees.
The cooling fins 32 provided at 1 further ensure that. However, for example, as in an ultraviolet irradiation device 34 of the sewage treatment facility shown in FIG.
When a plurality of 8 (three in this figure) are used and they are spaced apart from each other in the direction perpendicular to the water surface, the temperature becomes higher due to the heat generated from the lamp as it approaches the water surface. Therefore, the mercury 3 in the exhaust pipe 29 of each electrodeless discharge lamp 28
The temperature around 0 will vary. This variation can be reduced by changing the position of the exhaust pipe 29 according to the temperature around the mercury 30 in the exhaust pipe 29. In the present embodiment, the concave portion 32A is made concentric, and the position of the exhaust pipe 29 is eccentric from the center axis of the arc tube 1, so that the exhaust pipe 29 can be set at an arbitrary position in the concave portion 32A. In the above-described ultraviolet irradiation device 34, the position of the exhaust pipe 29 may be set to be lower as the water surface is closer.

FIG. 15 shows experimentally the change in relative ultraviolet (UV) intensity when the position of the exhaust pipe 29 is divided into eight stages from the bottom (ground) to the top (heaven). FIG. FIGS. 16 to 18 are diagrams showing the results of experimentally determining the change in relative ultraviolet intensity versus water temperature due to the difference in the position of the exhaust pipe 29. FIG. 19 shows the position of the exhaust pipe 29 in FIGS. It is a figure which shows the change of the whole relative ultraviolet intensity vs. water temperature at the position shown. As shown in FIG. 15, when the water temperature is set to 20, the relative ultraviolet light intensity decreases because the temperature around the mercury 30 increases as the position of the exhaust pipe 29 is set upward. Also,
As shown in FIG. 16, when the position of the exhaust pipe 29 is at the bottom (the position of “0”), it can be seen that the relative ultraviolet intensity becomes maximum near the water temperature of 30 degrees. In addition, as shown in FIG. 17, when the position of the exhaust pipe 29 is set at the center (the position of “4”), it can be seen that the relative ultraviolet intensity becomes maximum near the water temperature of 20 degrees. In addition, as shown in FIG. 18, when the position of the exhaust pipe 29 is at the top (position "8"), it can be seen that the relative ultraviolet intensity becomes maximum near the water temperature of 10 degrees. Therefore, in the ultraviolet irradiation device 34, the electrodeless discharge lamp 28 disposed at the bottom
Then, the position of the exhaust pipe 29 is set to the position of “8”,
In the electrodeless discharge lamp 28 disposed at the center, the position of the exhaust pipe 29 is set to the position of “4”, and in the electrodeless discharge lamp 28 disposed at the top, the position of the exhaust pipe 29 is set to “0”. The relative ultraviolet intensity with respect to the overall water temperature at that time is as shown in FIG.

As described above, by making it possible to change the position of the exhaust pipe 29, a plurality of electrodeless discharge lamps 28 are used as in the case of the ultraviolet irradiation device 34, and they are moved in the direction perpendicular to the water surface. Even in the case where the air outlets are spaced apart from each other, the temperature around the mercury 30 in the exhaust pipe 29 can be adjusted by arranging the exhaust pipe so as to be more distant from the water surface as it is closer to the water surface. Variations in the emission intensity of the electrodeless discharge lamp 28 can be suppressed. As a result, efficient irradiation becomes possible. Note that the electrodeless discharge lamps 20, 24, and 27 of the above-described first to fourth embodiments may be used as the ultraviolet irradiation device 34. Further, it is of course possible to realize an electrodeless discharge lamp in which all of the characteristic portions of the electrodeless discharge lamps 20, 24, 27, and 28 of the first to fifth embodiments are combined.

[0046]

According to the first and second aspects of the present invention, since each of the plurality of inductive coupling coils is fixed by the coil fixing member, the coil receives a mechanical shock or expands due to heat generated when the lamp is turned on. Even in this case, each deformation of the inductive coupling coil can be suppressed. Therefore, the impedance does not change even if the inductive coupling coil receives a mechanical shock or heat generated when the lamp is turned on. The lamp does not go out and the power supplied to the lamp does not decrease.

According to the third aspect of the present invention, since a plurality of coil fixing connecting rods are provided, each of the inductive coupling coils can be more firmly fixed, and each deformation of the inductive coupling coil can be further reduced. be able to.

According to the fourth aspect of the present invention, since a part of each of the two conductive wires is fixed by the conductive wire fixing member, the deformation of each conductive wire due to heat generated when the lamp is turned on can be suppressed. Therefore, the plurality of inductive coupling coils
Since there is no influence from each conductive wire due to the heat generated when the lamp is turned on, there is no change in impedance due to the influence, and even if the change is slight, the lamp does not turn on, extinguishes, There is no reduction in power input to the system.

According to the fifth aspect of the present invention, since a plurality of conductive wire fixing members are provided, each conductive wire can be further firmly fixed, and each deformation of the inductive coupling coil can be further suppressed. it can.

According to the sixth aspect of the present invention, since all the portions of each of the two conductive wires are fixed by the conductive wire fixing member, deformation of each conductive wire due to heat generation when the lamp is turned on can be suppressed. . Therefore, since the plurality of inductive coupling coils are not affected by each conductive wire due to heat generated when the lamp is turned on, there is no change in impedance due to the influence, and even if the impedance is changed, the degree is small. In addition, the lamp does not turn on or turn off, and the power supplied to the lamp does not decrease.

According to the present invention, a part of each of the two conductive wires is fixed by the conductive wire / inductive coupling coil fixing member, and at least one of the plurality of inductive coupling coils is fixed. Therefore, it is possible to suppress deformation of each conductive wire and the fixed inductive coupling coil due to heat generated when the lamp is turned on. Therefore, the plurality of inductive coupling coils are not affected by each conductive wire due to heat generated when the lamp is turned on, and the fixed inductive coupled coils are suppressed from being deformed due to heat generated when the lamp is turned on. Since there is no change in the impedance, and even if the change is slight, the lamp does not turn off or go out, and the power supplied to the lamp does not decrease.

According to the eighth aspect of the present invention, since a plurality of conductive wire / inductive coupling coil fixing members are provided, each inductive coupling coil and each conductive wire can be more firmly fixed.
The deformation of each inductive coupling coil and each conductive wire can be further reduced.

According to the ninth aspect of the present invention, all the portions of each of the two conductive wires are fixed by the conductive wire / inductive coupling coil fixing member, and at least one of the plurality of inductive coupling coils is fixed. Since it is fixed, it is possible to suppress the deformation of each conductive wire and the fixed inductive coupling coil due to heat generated when the lamp is turned on. Therefore, the plurality of inductive coupling coils are not affected by each conductive wire due to the heat generated when the lamp is turned on, and the fixed inductive coupled coils are prevented from changing in shape due to the heat generated when the lamp is turned on. Therefore, there is no change in the impedance, and even if the change is slight, the lamp is not lit or extinguished, and the power supplied to the lamp is not reduced.

According to the tenth aspect of the present invention, the winding width of the plurality of inductive coupling coils decreases as the distance from the power supply side increases, so that the resistance of the line of the two conductive wires increases as the distance from the power supply side increases. In response to this phenomenon, the power supplied from each of the plurality of inductive coupling coils to the arc tube becomes uniform, and the light emission intensity of the arc tube can be made uniform overall.

According to the eleventh aspect of the present invention, the wires for the two conductive wires of the plurality of inductive coupling coils are alternately or alternately reversed every few wires. The same power can be supplied to the arc tube, and flickering of the light emission of the lamp can be eliminated.

According to the twelfth aspect of the present invention, since the material of the inductive coupling coil and the conductive wire is aluminum or an alloy thereof, the oxidation rate is lower than that of conventionally used copper or an alloy thereof, and accordingly, , Can extend the life.

According to the thirteenth aspect of the present invention, the exhaust pipe is provided eccentrically with respect to the arc tube, the cap accommodates the tip of the exhaust pipe, and has a concentric concave portion with respect to the cap. Since the fins are provided, the exhaust pipe can be arranged at any position in the concave portion of the cooling fin. Even in the case of disposing the exhaust pipe vertically away from the water surface, it is possible to adjust the temperature around the mercury in the exhaust pipe by arranging the exhaust pipe away from the water surface as it gets closer to the water surface. Of the electrodeless discharge lamp can be suppressed. As a result, efficient irradiation becomes possible.

According to the fourteenth aspect of the invention, since the electrodeless discharge lamp of the above invention is used, it is possible to provide a highly reliable and high performance ultraviolet irradiation apparatus.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure of a first embodiment of an electrodeless discharge lamp according to the present invention.

FIG. 2 is a wiring diagram of the electrodeless discharge lamp according to the first embodiment.

FIG. 3 is a view showing a connection relationship among a coil fixing connecting rod, a coil fixing piece, and an inductive coupling coil of the electrodeless discharge lamp according to the first embodiment.

FIG. 4 is a wiring diagram of an application example of the electrodeless discharge lamp according to the first embodiment.

FIG. 5 is a diagram illustrating an application example of a coil fixing piece of the electrodeless discharge lamp according to the first embodiment.

FIG. 6 is a perspective view showing a structure of an electrodeless discharge lamp according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing a conductive wire fixing block of an electrodeless discharge lamp according to a second embodiment and an application example thereof.

FIG. 8 is a sectional view showing an application example of a conductive wire fixing block of an electrodeless discharge lamp according to a second embodiment.

FIG. 9 is a wiring diagram of a third embodiment of the electrodeless discharge lamp according to the present invention.

FIG. 10 is an equivalent circuit diagram of the electrodeless discharge lamp according to the third embodiment.

FIG. 11 is a view for explaining features of a fourth embodiment of the electrodeless discharge lamp according to the present invention.

FIG. 12 is a perspective view showing the structure of a fifth embodiment of the electrodeless discharge lamp according to the present invention.

FIG. 13 is a view showing a structure of a cap and a cooling fin of an electrodeless discharge lamp according to a fifth embodiment.

FIG. 14 is a longitudinal sectional view showing a structure of an ultraviolet irradiation device using an electrodeless discharge lamp according to a fifth embodiment.

FIG. 15 is a view for explaining features of an electrodeless discharge lamp according to a fifth embodiment.

FIG. 16 is a view for explaining features of an electrodeless discharge lamp according to a fifth embodiment.

FIG. 17 is a diagram for explaining features of the electrodeless discharge lamp according to the fifth embodiment.

FIG. 18 is a view for explaining features of the electrodeless discharge lamp according to the fifth embodiment.

FIG. 19 is a view for explaining features of an electrodeless discharge lamp according to a fifth embodiment.

FIG. 20 is a perspective view showing a structure of a conventional electrodeless discharge lamp.

FIG. 21 is a wiring diagram of a conventional electrodeless discharge lamp.

FIG. 22 is an equivalent circuit diagram of a conventional electrodeless discharge lamp and a matching circuit.

FIG. 23 is a view for explaining a problem of a conventional electrodeless discharge lamp.

FIG. 24 is a view for explaining a problem of a conventional electrodeless discharge lamp.

FIG. 25 is a view for explaining a problem of a conventional electrodeless discharge lamp.

FIG. 26 is a view for explaining a problem of a conventional electrodeless discharge lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS ₁ Arc tube 2 ₁ , 2 ₂ , ..., 2 ₆ Inductive coupling coil 3 ₁ , 3 ₂ Conductive wire 4 Protective tube 5 ₁ , 5 ₂ Holder 6 Matching circuit 20, 24, 27, 28 Electrodeless discharge lamp 21 For coil fixing Connecting rod 22, 23, 26 Coil fixing piece 25 Conductive wire fixing block 29 Exhaust pipe 30 Mercury 31 Cap 32 Cooling fin 32A Recess 34 Ultraviolet irradiation device 50 Screw

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Tadashi Tanaka 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo F-term in Toshiba Lighting & Technology Corporation (reference) 5C039 NN04

Claims (14)

[Claims] 1. An arc tube having a sealed discharge space;
A plurality of inductive coupling coils wound around an outer wall surface of the arc tube and transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; And a protective tube for accommodating a plurality of inductive coupling coils; and a coil fixing member for fixing each of the plurality of inductive coupling coils. . 2. A coil fixing connecting rod having a length substantially the same as that of the arc tube or a length approximately twice as long as the arc tube by folding the coil fixing member; A plurality of coil fixing pieces for mechanically connecting the inductive coupling coils; and an electrodeless discharge lamp. 3. A plurality of said coil fixing connecting rods, and the same number of coil fixing pieces as described above for each coil fixing connecting rod, wherein each of said coil fixing connecting rods is fixed to each of said coil fixing connecting rods. 3. The electrodeless discharge lamp according to claim 2, wherein each of the inductive coupling coils is mechanically connected via a piece. 4. An arc tube having a sealed discharge space;
A plurality of inductive coupling coils wound around an outer wall surface of the arc tube and transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; And a protective tube for accommodating a plurality of inductive coupling coils; and a conductive wire fixing member for mechanically connecting a part of each of the two conductive wires to fix them. An electrodeless discharge lamp, comprising: 5. The electrodeless discharge lamp according to claim 4, wherein a plurality of said conductive wire fixing members are provided. 6. An arc tube having a sealed discharge space;
A plurality of inductive coupling coils wound around an outer wall surface of the arc tube and transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; And a protective tube for accommodating a plurality of inductive coupling coils; a conductive wire fixing means for mechanically connecting all parts of each of the two conductive wires to fix them. An electrodeless discharge lamp comprising a member. 7. An arc tube having a sealed discharge space;
A plurality of inductive coupling coils wound around an outer wall surface of the arc tube and transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; And a protective tube for accommodating a plurality of inductive coupling coils; a part of each of the two conductive wires is mechanically coupled to each other to fix them, and An electrodeless discharge lamp comprising: a conductive wire / inductive coupling coil fixing member for fixing at least one of the inductive coupling coils. 8. The electrodeless discharge lamp according to claim 7, wherein a plurality of the conductive wire / inductive coupling coil fixing members are provided. 9. An arc tube having a sealed discharge space;
A plurality of inductive coupling coils wound around an outer wall surface of the arc tube and transmitting energy to a discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; And a protective tube for accommodating a plurality of inductively coupled coils; and an electrodeless discharge lamp comprising: mechanically connecting all parts of each of the two conductive wires to fix them; An electrodeless discharge lamp comprising a conductive wire / inductive coupling coil fixing member for fixing at least one of a plurality of inductive coupling coils. 10. The electric power supplied to the arc tube from each of the plurality of inductive coupling coils becomes equal, while the resistance of the lines of the two conductive lines increases as the distance from the power supply side increases. The electrodeless discharge lamp according to any one of claims 1 to 9, wherein a winding width of the plurality of inductive coupling coils is reduced as the distance from the power supply side increases. 11. The electrodeless discharge according to claim 1, wherein wirings for the two conductive wires of each of the plurality of inductive coupling coils are alternately or alternately reversed every few wires. lamp. 12. The electrodeless discharge lamp according to claim 1, wherein a material of the plurality of inductive coupling coils and the two conductive wires is aluminum or an alloy thereof. 13. An arc tube having a sealed discharge space; an exhaust tube provided in communication with the arc tube to hold mercury that controls discharge in the arc tube; and wound around the arc tube. A plurality of inductive coupling coils for transmitting energy to the discharge space; two conductive wires connected to both ends of the plurality of inductive coupling coils; and the luminous tube and a plurality of inductive coupling coils. An electrodeless discharge lamp comprising: a protective tube to be housed; and a cap mounted on at least a side of the arc tube on which the exhaust tube is provided, wherein the exhaust tube is disposed at one end of the arc tube. A cooling fin provided in the same direction as the longitudinal direction of the arc tube and eccentric from the center axis of the arc tube, the cap accommodating a tip portion of the exhaust tube, and having a concentric concave portion with respect to the cap; Characterized by the provision of Electrodeless discharge lamp. 14. An ultraviolet irradiation apparatus comprising the electrodeless discharge lamp according to claim 1. Description: