JP3624999B2 - Electrodeless discharge lamp unit and liquid processing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrodeless discharge lamp unit having no electrode and a liquid processing apparatus for performing water treatment with ultraviolet rays irradiated from the electrodeless discharge lamp unit.
[0002]
[Prior art]
An example of a conventional electrodeless discharge lamp is disclosed in Japanese Examined Patent Publication No. Sho 62-163297 as shown in FIG. In this example, a plurality of excitation coils 2a, 2b, 2c are wound around the outer periphery of a cylindrical discharge tube 1 filled with mercury or a rare gas, and these excitation coils 2a, 2b, 2c are connected in parallel. When a high frequency current is supplied from the high frequency oscillator 3 to the coils 2a, 2b and 2c of such an electrodeless discharge lamp, three light emitting regions are formed in the cylindrical discharge tube 1 and irradiated with ultraviolet rays (UV). .
[0003]
Here, the reason why the excitation coil is divided into a plurality of parts and connected in parallel is that the inductance of the excitation coil viewed from the high-frequency oscillator 3 (high-frequency power source) is reduced by parallelizing the excitation coils, and is constantly high. This is because the circuit design of the high-frequency oscillator 3 and the like is advantageous by preventing the voltage from being applied to the excitation coil.
[0004]
The electrodeless discharge lamp as described above is used in a liquid processing apparatus that sterilizes dirty water by irradiating it with ultraviolet rays. This liquid treatment device is a device that sterilizes running water with an electrodeless discharge lamp submerged in running water. However, since the running water directly touches the tube wall of the discharge tube, the temperature of the tube wall of the discharge tube is almost the same as the water temperature. It will drop to.
[0005]
Here, FIG. 8 is a characteristic diagram showing the relationship between the coldest part of the discharge tube and the intensity of the ultraviolet rays irradiated from the discharge tube. From this characteristic diagram, when the coldest part of the discharge tube drops from 30 ° C. to around 10 ° C. due to the water temperature, the intensity of the irradiated ultraviolet rays is the highest when the coldest part of the discharge tube is around 40 ° C. It can be seen that it is 1/2 to 1/3 compared to the case. Therefore, when the conventional electrodeless discharge lamp is submerged in running water, there is a problem that the irradiation efficiency of ultraviolet rays irradiated from mercury or rare gas sealed in the discharge tube is reduced, or startability is deteriorated. There is a problem that. For this reason, in the conventional liquid processing apparatus using this type of electrodeless discharge lamp, the amount of ultraviolet rays irradiated from the electrodeless discharge lamp submerged in running water is insufficient, and it is sufficient as expected. There is a problem that proper sterilization treatment cannot be performed.
[0006]
Therefore, in order to avoid the above problems, the electrodeless discharge lamp is accommodated in a sealed container (envelope), and the entire vessel is submerged to prevent water from directly touching the wall of the discharge tube. There is a known example in which the discharge tube is kept warm in the vessel so that the temperature of the wall of the discharge tube is not lowered and the irradiation efficiency of ultraviolet rays from the discharge tube is not lowered. In such a known example, if the discharge tube is not housed in the vessel in a mechanically stable manner, the discharge tube in the vessel may move, and the discharge tube may be damaged by colliding with the wall surface of the vessel. is there. For this reason, a support structure for fixing the discharge tube in the vessel is necessary. However, if the support structure is complicated or a special member is used, the manufacturing cost of the electrodeless discharge lamp is increased. .
[0007]
[Problems to be solved by the invention]
As described above, a conventional electrodeless discharge lamp that is turned on by passing a high-frequency current through an excitation coil wound around the outer periphery of the discharge tube is housed in a container, and submerged in the water in each container to sterilize the flowing water. In the liquid processing apparatus, a support structure for fixing the discharge tube in the container is necessary to prevent breakage of the discharge tube in the container. If the support structure is complicated or a special member is used, an electrodeless There was a problem that the manufacturing cost of the discharge lamp was increased.
[0008]
Therefore, the present invention has been made to solve the above-described problems. Even when used in water, the ultraviolet irradiation efficiency does not decrease, and the discharge tube is supported on the vessel with a simple structure, so that it is inexpensive and mechanically stable. It is an object of the present invention to provide an electrodeless discharge lamp unit having high performance and a highly reliable liquid processing apparatus using the electrodeless discharge lamp unit.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is constituted by an outer tube having a space portion with a ring-shaped cross section and an inner tube that forms a hollow portion of the outer tube and is longer than the outer tube, and the outer tube has mercury or noble gas. A discharge tube enclosing the discharge tube; an excitation coil wound around an outer periphery of the outer tube of the discharge tube; and at least a portion accommodating the discharge tube and the excitation coil is formed of an ultraviolet transmitting member, and the discharge tube A watertight container that supports both ends of the inner tube with an inner wall; a pair of lead wires that supply a high-frequency current to the excitation coil; one of the watertight structures that introduces the pair of lead wires into the container; And two introduction holes.
[0010]
With such a configuration, the inner wall surface of the vessel supports both ends of the inner tube of the discharge tube, so that the discharge tube is fixed in the vessel and the discharge tube cannot move in the vessel. When a high frequency current is supplied from the lead wire inserted into the container through the introduction hole to the excitation coil in the container, the discharge tube is turned on, and ultraviolet rays are emitted from the enclosed mercury or the like. At this time, even if the vessel is submerged in water, the temperature of the discharge tube is lower than the water temperature due to the fact that water does not directly touch the tube wall of the discharge tube and the heat generation effect of the discharge tube and the insulation effect of the vessel. No, and maintain around 40 ° C. Thereby, ultraviolet rays are irradiated with good radiation efficiency without lowering the temperature of mercury in the discharge tube.
[0011]
The container according to a second aspect of the present invention includes a cylindrical tube formed of an ultraviolet transmitting member; a pair of flanges that seal an open portion of the tube; and the discharge tube by the pair of flanges. Both ends of the inner tube are supported.
[0012]
With such a configuration, both ends of the inner tube of the discharge tube are sandwiched and supported by the inside of a pair of flanges constituting the vessel, and the discharge tube is fixed in the vessel.
[0013]
The container according to a third aspect of the present invention comprises a cylindrical tube formed of an ultraviolet transmitting member; a pair of flanges for sealing an open portion of the tube; and both ends of the inner tube of the discharge tube Is inserted into the pair of flanges.
[0014]
With such a configuration, both ends of the inner tube of the discharge tube are inserted and supported by a pair of flanges constituting the vessel, and the discharge tube is fixed in the vessel.
[0015]
According to a fourth aspect of the present invention, an outer tube having a ring-shaped space portion and a hollow portion of the outer tube and an inner tube longer than the outer tube are formed, and mercury or a rare gas is introduced into the outer tube. An enclosed discharge tube; an excitation coil wound around an outer periphery of the outer tube of the discharge tube; and at least a portion accommodating the discharge tube and the excitation coil is formed of an ultraviolet transmissive member; A water-tight container provided on the wall surface with a through-hole that fits an opening at one end of the tube and a through-hole that penetrates the other end of the inner tube and leads out an extension of the inner tube; A pair of lead wires for supplying a high-frequency current; and one or two introduction holes having a watertight structure for introducing the pair of lead wires into the container.
[0016]
With such a configuration, the through hole provided in the wall surface of the container fits one end of the inner tube of the discharge tube, and the through hole provided in the wall surface facing the wall surface is the other end of the inner tube. The discharge tube is fixed in the vessel so as to support the inner tube by penetrating the extension portion. When a high frequency current is supplied from the lead wire inserted into the container through the introduction hole to the excitation coil in the container, the discharge tube is turned on, and ultraviolet rays are emitted from mercury or the like enclosed in the outer tube. At this time, even if the container is submerged in water, the discharge tube temperature is not affected by the fact that water does not directly touch the outer tube wall of the discharge tube and the heat generation effect of the discharge tube and the insulation effect of the container. The temperature is kept at around 40 ° C. without lowering. Thereby, ultraviolet rays are irradiated with good radiation efficiency without lowering the temperature of mercury in the discharge tube. At the same time, when air is sent into the inner tube by a compressor (not shown) from the opening of the extension portion of the inner tube of the discharge tube that is exposed to the outside from the through hole of the container, the air in the inner tube is discharged from the outer tube of the discharge tube. Ozone is generated by exposure to the irradiated ultraviolet rays, and this ozone is injected into the water from the other through-hole of the container, and the flowing water is sterilized by this ozone.
[0017]
According to a fifth aspect of the present invention, there is provided a porous material that prevents intrusion of liquid into the opening portion of the through hole formed in the wall surface of the container that fits the opening portion at one end of the inner tube of the discharge tube and has air permeability. A material filter is provided.
[0018]
With such a configuration, ozone generated in the inner tube of the discharge tube is jetted together with air into countless bubbles in water through a porous filter that closes the opening of the through hole formed in the wall surface of the container. As a result, ozone touches a wide range of water and sterilizes this water.
[0019]
The excitation coil wound around the outer peripheral portion of the discharge tube of the invention of claim 6 is a coil divided into a plurality of independent coils, and the plurality of excitation coils are parallel to the pair of lead wires. Connected in the container.
[0020]
With such a configuration, since the inductance of the excitation coil as viewed from the pair of lead wires is reduced, the discharge tube is lit even when the high frequency voltage constantly applied to the excitation coil is low. A low high frequency voltage is applied to the other side from a high frequency power source (not shown).
[0021]
The invention of claim 7 is an electrodeless discharge lamp unit according to any one of claims 1 to 3; a flowing water pipe in which the electrodeless discharge lamp unit is disposed and in which treated water flows; A watertight lead-out hole for drawing out a pair of lead wires coming out of the electrodeless discharge lamp unit to the outside of the water flow pipe; and a high-frequency power source for supplying a high-frequency current to the pair of lead wires drawn out from the lead-out hole doing.
[0022]
With such a configuration, the high-frequency current output from the high-frequency power source is supplied to the electrodeless discharge lamp unit inside the water pipe through the pair of lead wires drawn out from the lead hole of the water pipe, and the electrodeless Turn on the discharge lamp unit in running water. Even if the electrodeless discharge lamp unit is submerged and used, it is lit without irradiating the ultraviolet rays, and sterilized by irradiating a sufficient amount of ultraviolet rays into running water.
[0023]
The invention of claim 8 is an electrodeless discharge lamp unit according to any one of claims 4 to 6; a flow water pipe in which the electrodeless discharge lamp unit is disposed and a treated water flows into the electrodeless discharge lamp unit; A lead-out hole having a watertight structure for drawing out a pair of lead wires coming out from the electrodeless discharge lamp unit to the outside of the water flow tube; an extension of the inner pipe coming out from the container of the electrodeless discharge lamp unit to the outside of the water flow tube A water-tight through-hole provided in a wall of the water flow pipe for taking out to the outside; a high frequency power source for supplying a high frequency current to a pair of lead wires drawn out from the lead hole; provided in the pipe wall of the water flow pipe A compressor that feeds a gas containing oxygen from a distal end opening of the extension of the inner tube that is exposed to the outside through the formed through hole.
[0024]
With such a configuration, the high-frequency current output from the high-frequency power source is supplied to the electrodeless discharge lamp unit inside the water pipe through the pair of lead wires drawn out from the lead hole of the water pipe, and the electrodeless Turn on the discharge lamp unit in running water. Even if the electrodeless discharge lamp unit is submerged and used, it is lit without irradiating the ultraviolet rays, and sterilized by irradiating a sufficient amount of ultraviolet rays into running water. The compressor feeds in air, for example, from an extension portion of the inner tube of the electrodeless discharge lamp unit that protrudes from a through hole having a watertight structure provided in a tube wall of the water flow tube. As a result, the air sent into the inner tube of the electrodeless discharge lamp unit generates ozone, which is jetted into the flowing water tube to sterilize the flowing water or decompose organic substances in the flowing water.
[0025]
According to a ninth aspect of the present invention, an optical semiconductor member is applied to the inner wall surface of the water pipe adjacent to the electrodeless discharge lamp unit.
[0026]
With such a configuration, when the ultraviolet light irradiated from the electrodeless discharge lamp unit passes through the flowing water and reaches the inner wall of the water pipe, it hits the optical semiconductor member applied to the inner wall and is activated from the optical semiconductor member. Electrons are generated, and the flowing water is sterilized by the active electrons, or the contained organic matter is decomposed, and synergized with the sterilization of water by the ultraviolet rays and the sterilization of water by the ozone and the decomposition of the organic matter.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially broken perspective view showing a configuration of a first embodiment of an electrodeless discharge lamp unit of the present invention. Reference numeral 11 denotes a discharge tube made of quartz or the like that forms a discharge space having a double tube structure with a ring-shaped cross section, and is composed of an outer tube 11a and an inner tube 11b. Reference numeral 12 denotes an excitation coil wound around the outer peripheral portion of the outer tube 11a of the discharge tube 11, and each coil is independent. Reference numeral 13 denotes a cylindrical outer tube 13a formed of an ultraviolet transmitting member such as quartz, alumina, or ceramic, and the open end of the outer tube 13a is sealed so that water to be treated such as water enters the outer tube 13a. An envelope (container) composed of flanges 13b1 and 13b2 formed of a circular plastic or metal to prevent the discharge tube 11 from having a sufficient diameter. Reference numeral 14 denotes an introduction hole for introducing the pair of lead wires 15 into the envelope 13, and has a watertight structure so that water to be treated such as water does not enter the envelope 13. Reference numeral 15 denotes a lead wire covered with an insulator such as ceramics for supplying a high-frequency current to the excitation coil 12. The lead wire 15 is connected to the excitation coil 12 inside the envelope 13. Reference numeral 16 denotes a flowing water pipe made of an iron pipe or the like through which treated water (running water 100) flows, and has a diameter sufficient to accommodate the envelope 13 therein. Reference numeral 17 denotes a watertight drawing hole for drawing the lead wire 15 to the outside of the water flow pipe 16, and has a watertight structure so that the internal flowing water (treated water) 100 does not leak to the outside.
[0028]
Next, the configuration and operation of the present embodiment will be described. An electrodeless discharge lamp composed of a discharge tube 11 and an excitation coil 12 wound around the outer periphery of the discharge tube 11 is housed inside an envelope 13. A rare gas and mercury are enclosed in the outer tube 11 a of the discharge tube 11. The excitation coil 12 wound around the outer periphery of the discharge tube 11 is connected in parallel to a pair of lead wires 15 inserted from a pair of introduction holes 14 provided in the flange 13b1. The pair of lead wires 15 are drawn out of the water pipe 16 through a lead hole provided in the water pipe 16.
[0029]
Here, the inner tube 11b constituting the discharge tube 11 is longer than the outer tube 11a constituting the discharge tube 11, and both end portions thereof are inserted into the flanges 13b1 and 13b2 on both sides. Accordingly, the inner tube 11b is supported by the flanges 13b1 and 13b2, and the discharge tube 11 is fixed so as not to move in the envelope 13.
[0030]
Since a high frequency current is supplied from a high frequency power source (not shown) to the lead wire 15 drawn out of the water pipe 16, this high frequency current is supplied to the excitation coil 12 wound around the outer periphery of the discharge tube 11. The As a result, a discharge is generated inside the discharge tube 11, and the mercury atoms enclosed in the discharge tube are excited by the discharge, and irradiates ultraviolet rays such as 254 nm and 185 nm which are effective for sterilization. The irradiated ultraviolet light passes through the wall surface of the outer tube 13 a of the envelope 13 and is irradiated into the flowing water tube 16. The running water 100 flowing inside the running water pipe 16 is sterilized by the ultraviolet rays described above and flows downstream.
[0031]
By the way, since the discharge tube 11 is in the envelope 13, the water to be treated does not directly touch the tube wall of the discharge tube 11. For this reason, once the lamp is turned on, the tube wall of the discharge tube 11 does not drop to the temperature of the water to be treated due to the heat generated from the discharge tube 11 and the heat retaining effect of the envelope 13. The vicinity of 40 ° C., where the ultraviolet irradiation efficiency is good, is maintained.
[0032]
According to this embodiment, without providing a special member or the like as a support mechanism for the discharge tube 11, both ends of the inner tube 11 b of the discharge tube 11 constituting the double tube are connected to the flange 13 b 1 constituting the envelope 13. , 13 b 2, the discharge tube 11 can be fixed in the envelope 13 with a simple configuration. For this reason, not only can the discharge tube 11 not move in the envelope 13, and it is possible not only to eliminate accidents such as the discharge tube 11 colliding with the wall surface of the envelope 13 to break the discharge tube 11, The support mechanism of the discharge tube 11 does not block the ultraviolet rays irradiated from the discharge tube 11, and the irradiation efficiency of the ultraviolet rays can be kept good. Further, since the support mechanism of the discharge tube 11 is simple, the manufacture becomes easy, and the manufacturing cost of the electrodeless discharge lamp unit can be reduced.
[0033]
In addition, since the electrodeless discharge lamp composed of the discharge tube 11 and the excitation coil 12 is housed in the envelope 13, the running water 100 as the water to be treated does not directly touch the wall of the discharge tube 11. In addition, due to the heat retaining effect of the envelope 13, the tube wall of the discharge tube 11 that is lit can be maintained at around 40 ° C. For this reason, the ultraviolet irradiation efficiency irradiated from an electrodeless discharge lamp becomes as designed, and an expected bactericidal effect can be obtained for the flowing water 100.
[0034]
Further, the distance between the outer wall of the outer tube 11 a of the discharge tube 11 and the inner wall of the outer tube 13 a of the envelope 13 is configured to be 1/10 of this diameter from the diameter position of the excitation coil 12. For this reason, the dielectric constant of the water flowing outside the envelope 13 does not affect the inductance of the excitation coil 12, and electromagnetic energy can be efficiently supplied from the excitation coil 12 to the inside of the discharge tube 11.
[0035]
The same applies to a configuration in which the inner tube 11b is supported by the flanges 13b1 and 13b2 on both sides by sandwiching both ends of the inner tube 11b constituting the discharge tube 11 between the flanges 13b1 and 13b2 on both sides and applying a pressing force. There is an effect. That is, the inner tube 11b of the discharge tube 11 may be supported by some relationship with the flanges 13b1 and 13b2. Further, the target of sterilization of ultraviolet rays irradiated from the discharge tube 11 of this example is not only flowing water, but also water-containing liquid or fluid chemical substance, which has the same effect.
[0036]
FIG. 2 is a partially broken perspective view showing a second embodiment of the electrodeless discharge lamp unit of the present invention. Excitation coils 12 a, 12 b, and 12 c are wound around the outer periphery of the discharge tube 11 of the electrodeless discharge lamp housed in the envelope 13, and a pair of wires are disposed along the longitudinal direction of the discharge tube 11. 19 is arranged. The pair of wires 19 are arranged very close to the outer periphery of the discharge tube 11, and the excitation coils 12 a, 12 b, and 12 c are electrically connected to the pair of wires 19 in parallel. Further, one end of the pair of wires 19 is connected to a pair of lead wires 15 inserted into the inside of the envelope 13 through an introduction hole 14 provided in the flange 13 b 1 of the envelope 13. The discharge tube 11 has a double tube structure composed of an outer tube 11a and an inner tube 11b, and the tip of the inner tube 11b longer than the outer tube 11a is inserted into a through hole 20 drilled in the center of the flange 13b1, and the other The end portion passes through the through hole 20 formed in the center of the opposite flange 13b2 and protrudes to the outside of the envelope 13. The extension part C of the inner pipe that has come out of the outer envelope 13 is bent at a substantially right angle in the middle, and is drawn out of the water pipe 16 through a through hole 23 having a watertight structure formed in the wall surface of the water pipe 16. . A porous filter (porous member) 22 is attached to the opening of the through hole 20 formed in the flange 13b1.
[0037]
The discharge tube 11 has a portion at the tip of the inner tube 11b inserted into the through hole 20 of the flange 13b1 and a portion at the opposite end b passing through the through hole of the flange 13b2. It is supported and fixed by the flanges 13b1 and 13b2. Other configurations are the same as those of the first embodiment shown in FIG.
[0038]
Next, the operation of the present embodiment will be described. A high frequency current is supplied from a high frequency power source (not shown) to the lead wire 15 drawn to the outside from the lead hole 17 of the flowing water pipe 16, and this high frequency current is excited around the outer periphery of the discharge tube 11. 12a, 12b, 12c. As a result, a discharge is generated inside the outer tube 11a of the discharge tube 11, and ultraviolet rays such as 254 nm and 185 nm effective for sterilization are irradiated. The irradiated ultraviolet light passes through the envelope 13 and irradiates the running water 100 flowing inside the running water pipe 16 to sterilize the running water 100. At the same time, a compressor (not shown) is connected to the extension part C of the inner pipe 11b drawn out from the through hole 23 outside the flowing water pipe 16, and air is sent from the extension part C of the inner pipe 11b. As a result, the air in the inner tube 11b is exposed to ultraviolet rays irradiated from the discharge space in the outer tube 11a to generate ozone, and the air containing ozone becomes countless bubbles from the porous filter 22. Then, the water 100 that has been sprayed into the running water and exposed to ozone is sterilized. Here, the outer tube 11a is usually made of quartz, that is, quartz that well transmits 253 nm of mercury radiation, and the inner tube 11b is made of so-called synthetic quartz having a high ultraviolet ray transmission rate of 185 nm in order to increase the ozone generation efficiency. It has been. Further, the filter 22 is made of porous ceramics or the like, and does not allow the water to be treated to enter the inner tube 11b, and has air permeability for ejecting the air in the inner tube into running water.
[0039]
According to this embodiment, without providing a special member or the like as a support mechanism for the discharge tube 11, both ends of the inner tube 11 b of the discharge tube 11 constituting the double tube are connected to the flange 13 b 1 constituting the envelope 13. The discharge tube 11 can be fixed in the envelope 13 with a simple structure supported by 13b2, and the tip of one inner tube 11b is pulled out of the envelope 13 through the flange 13b2. Since the extension part C of the inner tube 11b is used as a passage for sending air to the inner tube 11b, the structure for sending the air for generating ozone to the inner tube 11b can be remarkably simplified, and an electrodeless discharge lamp can be easily manufactured. The price can be low.
[0040]
Further, since the extension part C for sending air to the inner tube 11b is drawn outward from the axial center part of the discharge tube 11, it does not block the ultraviolet rays irradiated from the discharge space in the outer tube 11a of the discharge tube 11. It is possible to efficiently irradiate the running water 100 with ultraviolet rays.
[0041]
Furthermore, the ultraviolet rays irradiated to the inner tube 11b side of the discharge tube 11 ozonize the air sent into the inner tube 11b, and this ozone is injected into the water and used to sterilize the running water 100. In addition to being able to effectively use the ultraviolet rays irradiated by the heat exchanger 11, the running water 100 can be sterilized not only by ultraviolet rays but also by ozone, so that efficient sterilization can be performed.
[0042]
In addition, since the excitation coil wound around the discharge tube 11 is divided into a plurality of parts and connected in parallel to the lead wire 15, the inductance of the excitation coil viewed from the lead wire 15 side is reduced, and the dielectric of the running water 100 is reduced. The adverse effect due to the rate can be reduced, and since it is not necessary to constantly apply a high voltage to the excitation coil, it is easy to design a circuit of a high-frequency power supply (not shown) that supplies a high-frequency current to the excitation coils 12a, 12b, and 12c. Can be.
[0043]
Further, since the current path is divided into a plurality of excitation coils from the lead wire 15 introduced into the envelope 13, the number of introduction holes 14 provided in the flange 13b1 of the envelope 13 is at most two. In addition to reducing the manufacturing cost of the envelope 13, it is possible to improve the reliability of the envelope 13 by reducing the risk of water leakage from the watertight structure of the introduction hole 14. In addition, there are the same effects as the first embodiment shown in FIG. The tip of the inner tube 11b projects through the through hole 20 formed in the flange 13b1 and protrudes to the outside of the flange 13b1, and the porous lid is attached to the opening of the projecting inner tube 11b. Even if it adopts, there is a similar effect.
[0044]
FIG. 3 is a partially broken perspective view showing a third embodiment of the electrodeless discharge lamp unit of the present invention. In this example, an optical semiconductor member 24 such as titanium oxide is applied to the inner wall of the water pipe 16 adjacent to the electrodeless discharge lamp accommodated in the envelope 13. The optical semiconductor member 24 arranged in the vicinity of the electrodeless discharge lamp in this way generates active electrons when it receives ultraviolet rays irradiated from the electrodeless discharge lamp. The active electrons generated from the optical semiconductor member 24 sterilize the running water 100 or decompose organic substances in the running water 100. Other configurations are the same as those of the first embodiment shown in FIG.
[0045]
According to the present embodiment, the ultraviolet rays that have passed through the running water 100 and are wasted are applied to the optical semiconductor member 24 to generate active electrons, and synergistically with the sterilization of the running water 100 and the organic matter decomposition effect by the ultraviolet rays and ozone. Then, since the active water generated from the optical semiconductor member 24 sterilizes the flowing water 100 and decomposes the organic matter in the flowing water 100, more efficient water treatment can be performed. Other effects are the same as those of the second embodiment shown in FIG. The electrodeless discharge lamp unit of this example may be the one shown in FIG. 1, and in this case, the running water 100 is sterilized by ultraviolet rays and active electrons.
[0046]
FIG. 4 is a view showing a fourth embodiment of the electrodeless discharge lamp unit of the present invention. In this example as well, a slight pressing force is applied to the tip of the inner tube 11b longer than the outer tube 11a of the discharge tube 11 constituting the double tube by the flanges 13b1 and 13b2 constituting the envelope 13, and this inner tube 11b. The discharge tube 11 is fixed in the envelope 13 by supporting the above. Further, the end portions of the three excitation coils 12a, 12b, and 12c wound around the outer periphery of the outer tube 11a are wound around the portion protruding from the outer tube 11a of the inner tube 11b, and these end portions are close to the inner tube 11b. The wire 19 is electrically connected in parallel. Each of the excitation coils 12a, 12b, and 12c is wound around the entire outer peripheral portion of the outer tube 11a.
[0047]
According to the present embodiment, the ends of the three excitation coils 12a, 12b, and 12c are wound and fixed to the portion of the inner tube 11b that protrudes from the outer tube 11a, and the wire 19 is electrically connected to this portion. Since they are connected in parallel, the parallel connection wiring to the excitation coils 12a, 12b, 12c can be fixedly arranged at the axial center of the discharge tube 11 and outside the outer tube 11a with a simple configuration. The parallel connection wiring to 12b, 12c can be mechanically extremely stable, and the parallel connection wiring does not protrude into the envelope 13. Therefore, the space inside the envelope 13 is reduced. While being able to hold | maintain favorably, the said parallel connection wiring does not block the ultraviolet-ray irradiated from the discharge tube 11, and can irradiate an ultraviolet-ray in the flowing water 100 efficiently.
[0048]
FIG. 5 is a block diagram showing the configuration of the first embodiment of the liquid processing apparatus of the present invention. For example, an electrodeless discharge lamp unit 50 having the same configuration as that shown in FIG. The lead 15 wire connected to the electrodeless discharge lamp unit 50 is drawn to the outside from the lead hole 17 provided in the tube wall of the flowing water pipe 16 and connected to the high frequency power source 40. A current is supplied to the electrodeless discharge lamp unit 50. The flowing water pipe 16 is connected to the water pipe 42 by the connecting portion 41, and water flows into the flowing water pipe 16 from the water pipe 42 on the left side in the drawing. The water that has flowed into the flowing water pipe 16 is sterilized by irradiation with ultraviolet rays generated from the electrodeless discharge lamp unit 50, and the sterilized water flows from the flowing water pipe 16 to the water pipe 42 on the right side in the figure.
[0049]
According to the present embodiment, the electrodeless discharge lamp unit 50 has a discharge tube housed in the envelope and does not directly contact the flowing water. Since the irradiation efficiency is not lowered, the designed ultraviolet light can be irradiated into the flowing water in the flowing water pipe 16. In addition, since the discharge tube is fixed in the envelope, the discharge tube does not move and break in the envelope, so the apparatus of this example is expected for flowing water flowing through the flowing water tube 16 as expected. The sterilizing effect can be stably exhibited. The electrodeless discharge lamp unit 50 has the same effect even when the one shown in FIG. 4 is used.
[0050]
FIG. 6 is a block diagram showing the configuration of the second embodiment of the liquid processing apparatus of the present invention. For example, an electrodeless discharge lamp unit 50 having the same configuration as that shown in FIG. The lead 15 wire connected to the electrodeless discharge lamp unit 50 is drawn to the outside from the lead hole 17 provided in the tube wall of the flowing water pipe 16 and connected to the high frequency power source 40. A current is supplied to the electrodeless discharge lamp unit 50.
[0051]
Further, the extension part C of the inner pipe drawn out from the electrodeless discharge lamp unit 50 to the outside of the flowing water pipe 16 is connected to the compressor 60, and air is supplied from the compressor 60 to the inner pipe of the discharge tube of the electrodeless discharge lamp unit 50. Is sent to. The air sent into the inner tube is exposed to ultraviolet rays to generate ozone. On the other hand, the flowing water pipe 16 is connected to the water pipe 42 by the connecting portion 41, and water flows into the flowing water pipe 16 from the water pipe 42 on the left side in the drawing. The water that has flowed into the water pipe 16 is sterilized by irradiation with ultraviolet rays generated from the electrodeless water lamp unit 50, and is sterilized by ozone generated from the electrodeless discharge lamp unit 50. 16 flows out to the water pipe 42 on the right side in the figure.
[0052]
According to the present embodiment, since the running water is sterilized by both the ultraviolet rays emitted from the electrodeless discharge lamp unit 50 and the ozone ejected from the unit 50, the running water can be sterilized very efficiently. . Other effects are the same as those of the first embodiment shown in FIG. If the one shown in FIG. 3 is used as the electrodeless discharge lamp unit 50, the sterilization with respect to the flowing water is also performed with active electrons in addition to the ultraviolet rays and ozone, so that the sterilization efficiency of the flowing water can be further improved. .
[0053]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the discharge tube is housed in a sealed vessel, the inner wall of the vessel supports both ends of the inner tube of the discharge tube, thereby providing a discharge tube. Can be supported on the vessel with a simple structure, whereby the discharge tube can be fixed and the discharge tube can be prevented from being damaged due to movement of the discharge tube inside the vessel. In addition, because the discharge tube is housed in a sealed container, the surface temperature of the discharge tube does not decrease even when submerged in running water. Can do.
[0054]
According to the invention of claim 2, the discharge tube can be fixed by sandwiching and supporting both ends of the inner tube of the discharge tube by the inner surfaces of the pair of flanges.
[0055]
According to the invention of claim 3, the discharge tube can be reliably fixed by inserting and supporting both ends of the inner tube of the discharge tube into the flange on the pair of flanges.
[0056]
According to the invention of claim 4, when the discharge tube is housed in a sealed container, one end of the inner tube of the discharge tube is fitted into a through hole formed in the inner wall surface of the container, The discharge tube can be supported on the vessel with a simple structure by passing the extension of the inner tube through a through-hole drilled on the opposite side of the inner wall surface and supporting it in the vessel. The discharge tube can be prevented from being damaged by moving the discharge tube inside the container. Further, since the discharge tube is housed in a sealed container, the surface temperature of the discharge tube does not decrease even when submerged in running water, so that the irradiation efficiency of ultraviolet rays can be maintained well. . Furthermore, by sending air into the inner tube from the extension of the inner tube that has penetrated the container and came out of the container, ozone is generated by irradiating this air with ultraviolet rays irradiated to the inner tube side, In addition to ultraviolet rays, sterilization with ozone can be performed, and the sterilization efficiency against running water can be significantly improved.
[0057]
According to the invention of claim 5, since the air containing ozone in the inner tube is injected into the running water as countless bubbles by the filter of the porous member, it is possible to effectively sterilize the running water with ozone. it can.
[0058]
According to the invention of claim 6, since the inductance of the excitation coil is lowered, it is not necessary to constantly increase the output voltage of the high-frequency power source for supplying a high-frequency current to the excitation coil, and the design of the high-frequency power source can be facilitated. .
[0059]
According to the seventh aspect of the present invention, since the electrodeless discharge lamp unit that does not decrease the ultraviolet irradiation efficiency even when submerged in running water is used, the sterilization treatment can be performed as expected on the water to be treated.
[0060]
According to the invention of claim 8, since the electrodeless discharge lamp unit that does not decrease the ultraviolet irradiation efficiency even when submerged in running water, not only does the irradiation efficiency of the ultraviolet light on the water to be treated not decrease, In addition, since ozone is sprayed into running water to perform sterilization, extremely efficient running water sterilization can be performed.
[0061]
According to the ninth aspect of the present invention, active electrons are generated from the optical semiconductor member in response to the ultraviolet rays irradiated from the discharge tube. Therefore, in addition to the ultraviolet rays and ozone, the active electrons also contribute to sterilization of running water or the like, or decomposition of organic substances. By doing so, the water treatment efficiency can be further improved.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view showing a configuration of a first embodiment of an electrodeless discharge lamp unit of the present invention.
FIG. 2 is a partially broken perspective view showing a configuration of a second embodiment of an electrodeless discharge lamp unit of the present invention.
FIG. 3 is a partially broken perspective view showing a configuration of a third embodiment of an electrodeless discharge lamp unit of the present invention.
FIG. 4 is a diagram showing a configuration of a fourth embodiment of an electrodeless discharge lamp unit according to the present invention.
FIG. 5 is a schematic view showing the configuration of the first embodiment of the liquid processing apparatus of the present invention.
FIG. 6 is a schematic diagram showing the configuration of a second embodiment of the liquid processing apparatus of the present invention.
FIG. 7 is a schematic view showing an example of a conventional electrodeless discharge lamp lighting device.
FIG. 8 is a characteristic diagram showing the relationship between the coldest part of the discharge tube and the intensity of ultraviolet light emitted from the discharge tube.
[Explanation of symbols]
11 Discharge tube
11a, 13a Outer tube
11b Inner pipe
12, 12a-12c Excitation coil
13 Envelope
13b1, 13b2 Flange
14 Introduction hole
15 Lead wire
16 Flowing water pipe
17 Drawer hole
19 wire
20, 23 Through hole
22 Filter
24 Optical semiconductor members
40 High frequency power supply
41 connections
42 Water pipe
43 Compressor
50 Electrodeless discharge lamp unit

Claims (9)

A discharge tube having an outer tube having a ring-shaped space section and an inner tube that forms a hollow portion of the outer tube and is longer than the outer tube, and in which the outer tube is filled with mercury or a rare gas;
An excitation coil wound around the outer periphery of the outer tube of the discharge tube;
A watertight container in which at least part of the discharge tube and the excitation coil is formed of an ultraviolet transmitting member, and both ends of the inner tube of the discharge tube are supported by inner wall surfaces;
A pair of lead wires for supplying a high frequency current to the excitation coil;
One or two introduction holes having a watertight structure for introducing the pair of lead wires into the container;
An electrodeless discharge lamp unit comprising: The container includes a cylindrical tube formed of an ultraviolet transmitting member;
A pair of flanges that seal the open portion of the tube;
2. The electrodeless discharge lamp unit according to claim 1, wherein both ends of the inner tube of the discharge tube are supported by the pair of flanges. The container includes a cylindrical tube formed of an ultraviolet transmitting member;
A pair of flanges that seal the open portion of the tube;
2. The electrodeless discharge lamp unit according to claim 1, wherein both ends of the inner tube of the discharge tube are inserted into the pair of flanges. An outer tube having a space portion having a ring-shaped cross section, and a discharge tube that is formed of an inner tube that forms a hollow portion of the outer tube and is longer than the outer tube, and in which mercury or a rare gas is sealed in the outer tube;
An excitation coil wound around the outer periphery of the outer tube of the discharge tube;
At least a part for accommodating the discharge tube and the excitation coil is formed of an ultraviolet transmissive member, and a through hole for fitting an opening at one end of the inner tube of the discharge tube and the other end of the inner tube are passed through. A watertight container provided with a through-hole on the wall surface for extending the extension of the inner pipe to the outside;
A pair of lead wires for supplying a high frequency current to the excitation coil;
One or two introduction holes having a watertight structure for introducing the pair of lead wires into the container;
An electrodeless discharge lamp unit comprising: A porous member filter that prevents intrusion of liquid and has air permeability is provided at the opening portion of the through hole formed in the wall surface of the container that fits the opening portion at one end of the inner tube of the discharge tube. The electrodeless discharge lamp unit according to claim 5. The excitation coils wound around the outer periphery of the discharge tube are each divided into a plurality of independent coils, and the plurality of excitation coils are connected in parallel to the pair of lead wires in the container. The electrodeless discharge lamp unit according to any one of claims 1 to 5, wherein An electrodeless discharge lamp unit according to any one of claims 1 to 3;
A drainage pipe in which this electrodeless discharge lamp unit is disposed and in which water to be treated flows;
A water-tight lead-out hole for drawing out a pair of lead wires coming out of the electrodeless discharge lamp unit to the outside of the water pipe;
A high-frequency power source for supplying a high-frequency current to a pair of lead wires led out from the lead-out holes;
A liquid processing apparatus comprising: An electrodeless discharge lamp unit according to any one of claims 4 to 6;
A drainage pipe in which this electrodeless discharge lamp unit is disposed and in which water to be treated flows;
A water-tight lead-out hole for drawing out a pair of lead wires coming out of the electrodeless discharge lamp unit to the outside of the water pipe;
A water-tight through-hole provided in the pipe wall of the water flow pipe for taking out the extension of the inner pipe from the container of the electrodeless discharge lamp unit to the outside;
A high-frequency power source for supplying a high-frequency current to a pair of lead wires led out from the lead-out holes;
A compressor that feeds in a gas containing oxygen from a distal end opening of the extension of the inner pipe that is exposed to the outside through a through hole provided in a pipe wall of the water flow pipe;
A liquid processing apparatus comprising: The liquid processing apparatus according to claim 7, wherein an optical semiconductor member is applied to an inner wall surface of the water pipe adjacent to the electrodeless discharge lamp unit.

Images