JP2013031809A - Light source apparatus for treating liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source apparatus for treating liquid, which has a novel structure and in which a plurality of bar-shaped UV lamps are annularly arranged and a whole periphery in a circumferential direction can be uniformly irradiated with sufficient strength of UV rays.SOLUTION: The light source apparatus for treating liquid is equipped with: an accommodation pipe in which a sealed cylindrical space is formed between outer pipes mutually arranged on the same axis and an inner pipe where liquid to be treated is circulated; a plurality of bar-shaped UV lamps arranged in the inside of the cylindrical space of the accommodation pipe; and a lamp holding member which holds the UV lamps so as to be annularly arranged along the outer peripheral surface of the inner pipe in an attitude where a lamp central axis extends along the axial direction of the accommodation pipe. Each UV lamp has a luminous tube in which an aperture part for taking out light outside is formed so as to extend along the lamp central axis at a part in the circumferential direction and is arranged so that its aperture part faces the outer peripheral surface of the inner pipe.

Description

  The present invention relates to a light source device for liquid processing that is suitably used for, for example, high-purification processing for removing organic impurities (TOC) contained in water to be treated by irradiating ultraviolet rays.

In recent years, for example, in a purification process for removing organic impurities contained in water to be treated, a method for decomposing and removing organic impurities in water to be treated by irradiating ultraviolet rays has been used. As a light source device for liquid processing used for high-purification processing, for example, one having a configuration including a low-pressure mercury lamp or an intermediate-pressure mercury lamp capable of irradiating ultraviolet rays having a main peak at a wavelength of about 185 nm has been proposed ( For example, see Patent Document 1.)
Patent Document 2 includes a cylindrical container having a function of circulating the water to be treated, and a plurality of rod-shaped low-pressure mercury lamps or medium-pressure mercury lamps are parallel to the central axis of the cylindrical container. In addition, there is described a liquid processing light source device configured to be arranged in a ring shape at regular intervals in the circumferential direction.

JP 2008-260017 A JP 2007-245081 A

  Thus, in the liquid processing light source device used for the purification process, it is possible to uniformly irradiate the treated water with ultraviolet rays having a predetermined wavelength with sufficient intensity. It has been demanded.

  The present invention has been made based on the circumstances as described above, and in a configuration in which a plurality of rod-shaped ultraviolet lamps are arranged in a ring shape, ultraviolet rays having sufficient intensity are provided over the entire circumference in the circumferential direction. An object of the present invention is to provide a light source device for liquid processing having a novel structure capable of uniform irradiation.

The light source device for liquid processing according to the present invention includes a housing tube in which a sealed cylindrical space is formed between an outer tube and an inner tube that are coaxially arranged, and a cylindrical space in the housing tube. A plurality of rod-shaped ultraviolet lamps arranged, and a lamp holder that holds the ultraviolet lamps so that the center axis of the lamp extends along the axial direction of the receiving tube and is arranged in an annular shape along the outer peripheral surface of the inner tube In a light source device for liquid processing comprising a member,
Each of the ultraviolet lamps includes a light emitting tube formed so that an aperture portion for extracting light to the outside extends in part in a circumferential direction along the central axis of the lamp, and each of the ultraviolet lamps includes the aperture portion. It is arranged to face the outer peripheral surface of the inner pipe,
A liquid to be treated is circulated in the inner tube.

  In the light source device for liquid processing according to the present invention, the ultraviolet lamp emits ultraviolet light having a peak shorter than the wavelength of 200 nm, and is preferably used for water purification treatment.

Further, in the liquid processing light source device of the present invention, a power feeding mechanism for feeding power to each of the ultraviolet lamps is disposed on one end side in the axial direction inside the housing tube,
Each of the ultraviolet lamps is provided at a position facing each other on the outer surface of the arc tube so that the aperture portion is positioned in a region between the electrodes, and each of the electrodes includes: It is preferable that a connection portion to which the power feeding mechanism is electrically connected is formed at one end in the axial direction of the receiving tube.

  Furthermore, in the light source device for liquid processing according to the present invention, it is preferable that the electrodes approaching each other in two adjacent ultraviolet lamps have the same potential.

Furthermore, in the light source device for liquid processing according to the present invention, the power supply mechanism includes a power supply circuit board on which a first power supply terminal and a second power supply terminal each having an annular circuit pattern independent of each other are formed. And
It is preferable that each of the one electrode of each ultraviolet lamp is electrically connected to the first power supply terminal and the other electrode is electrically connected to the second power supply terminal.

  Furthermore, in the light source device for liquid processing according to the present invention, it is preferable that the outer tube constituting the housing tube has an ultraviolet shielding property.

  According to the light source device for liquid processing of the present invention, a plurality of inside the cylindrical space in the accommodating tube in which a sealed cylindrical space is formed between the outer tube and the inner tube arranged coaxially with each other. The rod-shaped ultraviolet lamp has a configuration in which the lamp central axis extends along the axial direction of the receiving tube and is arranged in a ring shape along the outer peripheral surface of the inner tube. A part having an arc tube formed such that an aperture for extracting light to the outside extends along the center axis of the lamp is used, and the ultraviolet lamp has the aperture facing the outer peripheral surface of the inner tube In the individual ultraviolet lamps, ultraviolet rays having a predetermined wavelength are radiated to a restricted range through the aperture portion, and thus ultraviolet rays generated inside the arc tube. It is possible to effectively use, it is possible to improve the radiation intensity of the ultraviolet, therefore, can be uniformly emitted over the entire periphery in the circumferential direction of the inner tube with ultraviolet rays at a sufficiently high strength.

  By using an ultraviolet lamp that emits ultraviolet light having a peak shorter than the wavelength of 200 nm, the liquid processing light source device can improve the purity of water to be treated containing, for example, organic impurities. It becomes useful as a light source device for performing the processing, and the desired high-purity processing can be efficiently performed.

  In addition, each of the ultraviolet lamps is provided at a position opposite to each other on the outer surface of the arc tube so that the aperture portion is positioned between the pair of electrodes, and each of the electrodes has one end in the axial direction of the housing tube. And a power supply mechanism for supplying power to each of the ultraviolet lamps is arranged on one end side in the axial direction inside the housing tube. Accordingly, it is possible to easily form a power feeding structure for each ultraviolet lamp and to prevent a power feeding member such as a lead wire from inhibiting ultraviolet radiation from the ultraviolet lamp.

  Furthermore, since the electrodes approaching each other in the two adjacent ultraviolet lamps are configured to have the same potential, it is possible to avoid a short circuit between the electrodes. Since the ultraviolet lamps can be reliably turned on and the ultraviolet lamps can be arranged close to each other, the liquid processing light source device itself can be downsized.

  Furthermore, the power supply mechanism includes a power supply circuit board on which a first power supply terminal and a second power supply terminal each having an annular circuit pattern independent from each other are formed, and each of one electrode of each ultraviolet lamp is provided. Is electrically connected to the first power supply terminal and the other electrode is electrically connected to the second power supply terminal. Regardless of the number of ultraviolet lamps, two is sufficient, so that the possibility of lowering the airtightness of the internal space (cylindrical space) of the storage tube due to the external lead being led out of the storage tube is reduced. Can do.

  Furthermore, since the outer tube constituting the housing tube is configured to have ultraviolet shielding properties, it is possible to prevent ultraviolet rays from leaking outside the liquid processing light source device. It is possible to prevent other devices located around the device from being adversely affected by ultraviolet rays.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing along the axial direction of an outer tube | pipe which shows the outline of a structure in an example of the light source device for liquid processing of this invention, (b) It is the sectional view on the AA line in (a). FIG. 2A is a plan view illustrating a configuration example of a lid member in the liquid processing light source device illustrated in FIG. 1, and FIG. 2B is a cross-sectional view along the axial direction. 2A is a cross-sectional view taken along the axial direction of the outer tube, and FIG. 2B is a cross-sectional view taken along line BB in FIG. . FIG. 2A is a plan view showing one configuration example of one lamp holding member in the liquid processing light source device shown in FIG. 1, and FIG. 2B is a cross-sectional view along the axial direction. FIG. 2A is a plan view showing one configuration example of the other lamp holding member in the liquid processing light source device shown in FIG. 1, and FIG. 2A is a plan view showing a configuration example of a power supply circuit board in the light source device for liquid processing shown in FIG. 1, and FIG. It is an enlarged view which shows roughly the positional relationship of a ultraviolet lamp and the circuit board for electric power feeding. FIG. 2A is a plan view showing a configuration example of a circuit board support member in the liquid processing light source device shown in FIG. 1, and FIG.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a schematic cross-sectional view taken along the axial direction of an outer tube, and FIG. 1B is a cross-sectional view taken along line AA in FIG. .
This liquid processing light source device (hereinafter simply referred to as “light source device”) 10 has a bottomed cylindrical outer tube 11 having one end opened, and the bottom wall of the outer tube 11 is hermetically sealed inside the outer tube 11. And a straight tubular inner tube 12 extending axially outward and coaxially arranged with each other, and a lid member 15 is inserted into the opening of the outer tube 11 inside. In this state, the housing 10 </ b> A is provided with a cylindrical space S formed between the inner peripheral surface of the outer tube 11 and the outer peripheral surface of the inner tube 12. The outer tube 11 and the inner tube 12 are made of, for example, quartz glass, and the bottom wall of the outer tube 11 and the inner tube 12 are integrally joined.
A light shielding member (not shown) made of, for example, a metal material or a glass material that does not easily transmit ultraviolet rays is provided on the outer peripheral surface of the outer tube 11, whereby ultraviolet rays are radiated to the outside of the outer tube 11. It is configured to have an ultraviolet shielding property to prevent this.

  The lid member 15 is made of, for example, ceramics, and as shown in FIG. 2, a cylindrical base portion 16A inserted into the opening of the outer tube 11 and an opening end surface of the outer tube 11 formed at one end of the base portion 16A. A central through hole 18 having a flange portion 16B to be stopped and disposed through which the inner tube 12 is inserted is formed. On the inner peripheral surface of the central through-hole 18, a plurality of step portions that form a plurality of substantially cylindrical space portions each having a different inner diameter are formed. A substantially cylindrical inner tube holding member 55 that holds the inner tube 12 in a state in which the inner tube 12 is inserted therein is disposed in the columnar space portion 18A on one end side in the central through hole 18. When the member 55 is inserted into the cylindrical space 18 </ b> A in the central through hole 18 of the lid member 15, for example, the O-ring 13 </ b> B provided on the outer peripheral surface of the inner tube 12 is the other end side of the inner tube holding member 55. It is crushed and elastically deformed by the opening end surface and the flat surface of the step portion forming the cylindrical space portion 18A, thereby forming a seal structure.

A concave groove 17 in which, for example, an O-ring 13A is mounted is formed on the outer peripheral surface of the base portion 16A of the lid member 15, and when the base portion 16A of the lid member 15 is inserted into the opening of the outer tube 11, The O-ring 13A mounted in the concave groove 17 is elastically deformed, and thereby the cylindrical space S in the housing tube is hermetically sealed.
Further, the through hole 19 through which the two external leads 49 constituting the power feeding mechanism are led out is formed to extend in the axial direction.

A plurality of, for example, four or more rod-shaped ultraviolet lamps 20 are arranged inside the cylindrical space S in the housing tube 10A.
Each ultraviolet lamp 20 is composed of, for example, an external electrode type rare gas fluorescent lamp that emits ultraviolet light having a peak shorter than a wavelength of 200 nm, and both ends made of, for example, quartz glass are sealed as shown in FIG. And a pair of strip-shaped electrodes, that is, one electrode 22A functioning as a high-voltage power supply electrode, The other electrode 22 </ b> B functioning as a ground electrode or a low voltage supply electrode is provided so as to extend in the longitudinal direction of the arc tube 21. Reference numeral 23 denotes a protective film provided to cover the outer surfaces of the respective electrodes 22A and 22B.
Each of the one electrode 22A and the other electrode 22B is electrically connected to one end located on the opening side of the outer tube 11 with an internal lead 48 constituting a power feeding mechanism, which will be described later, to form a connection portion. (See FIG. 1).

On the inner surface of the arc tube 21, a substantially cylindrical ultraviolet reflector 25 formed so that the opening extends along the longitudinal direction is an area between the electrodes of the one electrode 22A and the other electrode 22B. An aperture portion 26 for taking out light to the outside of the arc tube 21 by a region corresponding to the opening of the ultraviolet reflector 25 in the arc tube 21 along the lamp central axis C is provided. It is formed to extend. The ultraviolet reflector 25 is constituted by an ultraviolet reflecting film made of, for example, silica particles and alumina particles.
The opening angle α around the lamp central axis C of the opening of the ultraviolet reflector 25 is preferably in the range of 65 to 100 °, for example. When the opening angle α of the opening is excessively large, the light spreads too much, and the ultraviolet rays are irradiated to portions other than the inner tube 12, and when the opening angle α of the opening is excessively small, the inner tube In order to uniformly irradiate the light 12, it is necessary to arrange the ultraviolet lamps 20 closely or to keep the ultraviolet lamps away from the inner tube 12, which leads to an increase in the size of the apparatus.
A glass layer 27 is formed on the inner surface of the ultraviolet reflector 25 with a uniform thickness so as to cover the surface of the ultraviolet reflector 25. Further, on the inner surface of the glass layer 27, a phosphor layer 28 is formed. Are formed with a uniform thickness in the circumferential direction.
Furthermore, a starting assist conductive member 29 is provided at one end of the arc tube 21.

A gas for generating excimer molecules by dielectric barrier discharge, for example, xenon gas, is enclosed inside the arc tube 21 and is a material constituting the arc tube 21 when power is supplied to one electrode 22A. A dielectric barrier discharge is generated inside the arc tube 21 through the quartz glass, and ultraviolet light having a wavelength of, for example, 172 nm generated by the dielectric barrier discharge is directly radiated through the aperture portion 26, and is also generated by the ultraviolet light. Ultraviolet light having a predetermined wavelength generated when the phosphor in the phosphor layer 28 is excited is reflected directly or by the ultraviolet reflector 25 and is emitted to the outside of the arc tube 21 through the aperture portion 26.
Here, the phosphor that forms the phosphor layer 28 is used in accordance with the purpose. When the light source device 10 is used for, for example, a water purification process, a phosphor that emits ultraviolet light having a wavelength of 190 nm is used. Can be used.

  The ultraviolet lamp 20 is arranged such that the lamp central axis C extends along the axial direction of the housing tube 10 </ b> A and is arranged in a ring along the outer peripheral surface of the inner tube 12. 30 and the other end portion is held by the other lamp holding member 35, thereby restricting the movement of the ultraviolet lamp 20 in the radial direction of the housing tube 10 </ b> A.

  Thus, in the light source device 10, each ultraviolet lamp 20 is arranged such that the aperture portion 26 faces the outer peripheral surface of the inner tube 12, and as shown by a broken line in FIG. UV rays having a wavelength of λ are emitted over the entire circumference of the inner tube 12 in the circumferential direction.

  One lamp holding member 30 is made of, for example, the same material (for example, quartz glass) as the material constituting the outer tube 11 and has an outer diameter that matches the inner diameter of the outer tube 11 as shown in FIG. A central through hole 31 into which a part of a substantially cylindrical circuit board support member 50 to be described later is inserted is formed at the center and is concentric with the opening edge of the central through hole 31. A plurality of, for example, eight lamp holding insertion holes 32 are formed at positions spaced apart at equal intervals in the circumferential direction. This one lamp holding member 30 is welded, for example, at a position on the outer side in the axial direction (the opening side of the outer tube 11) from one end of the electrode of the ultraviolet lamp 20 on the inner peripheral surface of the outer tube 11. The one end portion of the ultraviolet lamp 20 is inserted into the lamp holding insertion hole 32 to hold it. Note that one end portion of the arc tube 21 in the ultraviolet lamp 20 may be fixed to one lamp holding member 30 with, for example, an adhesive, thereby preventing the ultraviolet lamp 20 from moving in the axial direction of the housing tube 10A. can do.

  The other lamp holding member 35 is made of, for example, an electrically insulating material such as ceramics, and has a disk shape having an outer diameter that matches the inner diameter of the outer tube 11 as shown in FIG. A central through hole 37 into which the inner tube 12 is inserted is formed, and a lamp holding recess 36 corresponding to each of the lamp holding insertion holes 32 in one lamp holding member 30 is formed. The other lamp holding member 35 is disposed opposite to the one lamp holding member 30 with the other surface being in contact with the inner surface of the bottom wall of the outer tube 11, and the ultraviolet lamp 20 has its arc tube 21. Is held in a state where a portion on the outer side in the axial direction from the other end of the electrode is received in the lamp holding recess 36. The other end portion of the ultraviolet lamp 20 in the arc tube 21 may be bonded to the other lamp holding member 35 with an adhesive, for example, thereby preventing the ultraviolet lamp 20 from moving in the axial direction of the housing tube 10A. It may be configured as such.

  A power feeding mechanism for feeding power to each of the ultraviolet lamps 20 is disposed on one end side in the axial direction inside the housing tube 10A. The power supply mechanism is electrically connected to the power supply circuit board 40, one end is electrically connected to the power supply circuit board 40, and the other end is electrically connected to each of the one electrode 22 </ b> A and the other electrode 22 </ b> B in the ultraviolet lamp 20. And two external leads each having one end led out of the outer tube 11 through the through-hole 19 in the lid member 15 and the other end electrically connected to the power supply circuit board 40. 49.

As shown in FIG. 6, the power supply circuit board 40 has a central through hole 41 into which a part of a substantially cylindrical circuit board support member 50 to be described later is inserted at the center. A first power supply terminal 42 and a second power supply terminal 43 each having an independent substantially circular circuit pattern are formed. A plurality of (four in this example) connection terminal portions 42B, to which the internal leads 48 connected to one electrode 22A of the ultraviolet lamp 20 are electrically connected, form an annular conductive path. For example, at positions spaced apart at equal intervals in the circumferential direction of the portion 42A, the conductive path forming portion 42A is continuously formed on the inner peripheral edge, and each connection terminal portion 42B has two internal lead lead-out holes 44. Is formed. A plurality of (four in this example) connection terminal portions 43B, to which the internal leads 48 connected to the other electrode 22B of the ultraviolet lamp 20 are electrically connected, form an annular conductive path. For example, at positions spaced apart at equal intervals in the circumferential direction of the portion 43A, the conductive path forming portion 43A is continuously formed on the outer peripheral edge, and each connection terminal portion 43B has two internal lead lead-out holes 44. Is formed.
A connection terminal portion 45 to which an external lead 49 is connected is formed in the first power supply terminal 42 and the second power supply terminal 43.

The connection method between the ultraviolet lamp 20 (internal lead 48) and the power supply circuit board 40 will be described in detail. The internal lead 48 is set so that the electrodes adjacent to each other in two adjacent ultraviolet lamps have the same potential. Is connected to the power supply circuit board 40. That is, as shown in FIG. 7, one ultraviolet lamp 20A of two adjacent ultraviolet lamps has one electrode 22A (or the other electrode 22B) as one electrode 22A (or the other electrode) in the other ultraviolet lamp 20B. 22B) and an internal lead 48 connected to one electrode 22A (or the other electrode 22B) in one ultraviolet lamp 20A, and one electrode 22A (or the other electrode in the other ultraviolet lamp 20B). The internal lead 44 connected to the electrode 22B) is connected to the same connection terminal portion 42B (43B) in the first power supply terminal 42 (or the second power supply terminal 43).
As described above, since the electrodes approaching each other in the two adjacent ultraviolet lamps are set to the same potential, an external electrode type is used as the ultraviolet lamp 20, so that a short circuit occurs between the electrodes. Thus, dielectric barrier discharge in the arc tube 21 can be surely generated in each ultraviolet lamp 20. In addition, since the ultraviolet lamps 20 can be arranged close to each other, the light source device 10 itself can be downsized. Here, in order to realize such a configuration, the number of ultraviolet lamps 20 is actually an even number.

The power supply circuit board 40 is supported and arranged by a circuit board support member 50 provided on one surface of one lamp holding member 30.
As shown in FIG. 8, the circuit board support member 50 includes a cylindrical base body 51 into which the inner tube 12 is inserted, and a flange shape formed on each of one end side portion and the other end side portion of the base body 51. The one end portion and the other end portion of the base body 51 protrude outward in the axial direction from the outer end surfaces of the engagement portions 52 and 53, respectively. In this circuit board support member 50, the protruding portion 51B on the other end side of the base 51 is inserted into the central through hole 31 in one lamp holding member 30, and the other surface of the engaging portion 53 on the other end side is one lamp. The holding member 30 is locked in contact with one surface. The power supply circuit board 40 is in a state in which the protruding portion 51A on one end side of the base 51 of the circuit board support member 50 is inserted into the central through hole 41, and the other surface is on the one end side of the circuit board support member 50. It is provided in contact with one surface of the joint portion 52. The protruding portion 51A on one end side of the base body 51 of the circuit board support member 50 is received in the cylindrical space portion 18B on the other end side in the central through hole 18 of the lid member 15. Therefore, the power supply circuit board 40 is The circuit board support member 50 is sandwiched and held by one surface of the engaging portion 52 on one end side and the other end surface of the lid member 15.

  As described above, since the ultraviolet lamp 20 emits ultraviolet light having a peak shorter than the wavelength of 200 nm as described above, for example, nitrogen gas is purged into the cylindrical space S of the housing tube 10A. For example, it is preferable that the internal atmosphere of the cylindrical space S is replaced with nitrogen, or an appropriate pipe is provided to circulate nitrogen gas.

  The light source device 10 is preferably used for, for example, water purification treatment. Specifically, for example, when the water to be treated containing organic impurities is supplied so as to circulate inside the inner tube 12, each of the ultraviolet lamps 20 has an aperture portion 26 facing the outer peripheral surface of the inner tube 12. Therefore, in the process in which the water to be treated W is circulated in the inner tube 12 in the axial direction of the housing tube 10A, ultraviolet light having a peak at a wavelength shorter than 200 nm is emitted from the light source device 10 by the light source device 10. 12 is emitted over the entire circumference in the circumferential direction, whereby organic impurities in the water W to be treated are decomposed and removed by the ultraviolet rays.

  Thus, according to the light source device 10 having the above-described configuration, the cylindrical shape in the accommodating tube 10A in which the sealed cylindrical space S is formed between the outer tube 11 and the inner tube 12 arranged coaxially with each other. Inside the space S, a plurality of rod-shaped ultraviolet lamps 20 are arranged so as to be annularly arranged along the outer peripheral surface of the inner tube 12 with the lamp central axis C extending along the axial direction of the housing tube 10A. As the ultraviolet lamp 20, an ultraviolet lamp 20 having an arc tube 21 formed so that an aperture 26 for extracting light to the outside extends along the lamp central axis C is used in a part in the circumferential direction. Since the ultraviolet lamp 20 is arranged so that the aperture portion 26 faces the outer peripheral surface of the inner tube 12, each individual ultraviolet lamp 20 receives ultraviolet rays of a predetermined wavelength. 26, the ultraviolet light generated inside the arc tube 21 can be used effectively. As a result, the light source device 10 as a whole can improve the ultraviolet radiation intensity. It is possible to uniformly radiate ultraviolet rays having sufficiently high intensity over the entire circumference in the circumferential direction of the outer tube 11. Since an external electrode type rare gas fluorescent lamp is used as the ultraviolet lamp 20, ultraviolet light having a peak shorter than the wavelength of 200 nm can be emitted more efficiently than, for example, a low-pressure mercury lamp. For example, it becomes extremely useful as a treatment for purifying the water to be treated containing organic impurities, and the desired purification treatment for the water to be treated can be efficiently performed.

  In addition, each ultraviolet lamp 20 is electrically connected to one end of the one electrode 22A and the other electrode 22B located on the opening side of the outer tube 11 to form a connection portion. Therefore, since the power feeding mechanism for feeding power to each of the ultraviolet lamps 20 is arranged on one end side in the axial direction inside the outer tube 11, the feeding structure for each ultraviolet lamp 20 can be easily made. While being able to form, it can prevent that electric power feeding members, such as a lead wire, inhibit the ultraviolet radiation by the ultraviolet lamp 20, for example.

  Furthermore, since the electrodes that are close to each other in the two adjacent ultraviolet lamps 20 are configured to have the same potential, it is possible to avoid a short circuit between the electrodes. Since the ultraviolet lamps 20 can be reliably turned on, and the ultraviolet lamps 20 can be disposed close to each other, the light source device 10 itself can be reduced in size.

  Furthermore, the power supply circuit board 40 is formed with a first power supply terminal 42 and a second power supply terminal 43 that are independent from each other, and each of the one electrode 22 of each ultraviolet lamp 20 is connected to the first power supply terminal 42. The number of external leads 49 that are electrically connected to the power supply terminal 42 and pulled out to the outside of the housing tube 10 </ b> A because the other electrode 22 </ b> B is electrically connected to the second power supply terminal 43. Since the number of the ultraviolet lamps 20 is two, it is sufficient to reduce the risk of reducing the airtightness of the internal space of the housing tube 10A due to the external lead 49 being led out of the housing tube 10A. Can do.

As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be added.
For example, the number of the ultraviolet lamps and the size of the opening angle of the opening of the ultraviolet reflector constituting the aperture part of each ultraviolet lamp are set so that ultraviolet rays are emitted over the entire circumference in the circumferential direction of the inner tube. For example, it is not limited to the structure which concerns on the said embodiment.

DESCRIPTION OF SYMBOLS 10 Light source device 10A Accommodating tube 11 Outer tube 12 Inner tube 13A, 13B O-ring 15 Lid member 16A Base portion 16B Flange portion 17 Concave groove 18 Central through hole 18A, 18B Cylindrical space portion 19 Through hole 20 Ultraviolet lamp 21 Light emitting tube 22A One electrode 22B The other electrode 23 Protective film 25 UV reflector 26 Aperture part 27 Glass layer 28 Phosphor layer 29 Start assisting conductive member 30 One lamp holding member 31 Central through hole 32 Lamp holding insertion hole 35 Other Lamp holding member 36 Lamp holding recess 37 Central through hole 40 Power supply circuit board 41 Central through hole 42 First power supply terminal 42A Conductive path forming portion 42B Connection terminal portion 43 Second power supply terminal 43A Conductive path forming portion 43B Connection Terminal section 44 Internal lead outlet hole 45 Connection terminal section 48 Internal lead 9 external lead 50 circuit board supporting member 51 base 51A, inner tube 51B protruding portions 52 and 53 engaging portion 55 holding member 60 channel C lamp center axis W treated water S cylindrical space

Claims (6)

A receiving tube in which a sealed cylindrical space is formed between an outer tube and an inner tube arranged coaxially with each other, and a plurality of rod-shaped ultraviolet lamps arranged inside the cylindrical space in the receiving tube; A liquid processing light source device comprising: a lamp holding member that holds the ultraviolet lamp in a posture in which a lamp central axis extends along the axial direction of the housing tube so as to be arranged in an annular shape along the outer peripheral surface of the inner tube In
Each of the ultraviolet lamps includes a light emitting tube formed so that an aperture portion for extracting light to the outside extends in part in a circumferential direction along the central axis of the lamp, and each of the ultraviolet lamps includes the aperture portion. It is arranged to face the outer peripheral surface of the inner pipe,
A liquid processing light source device, wherein a liquid to be processed is circulated in the inner tube.   2. The light source device for liquid processing according to claim 1, wherein the ultraviolet lamp emits ultraviolet light having a peak shorter than a wavelength of 200 nm and is used for water purification treatment. A power feeding mechanism for feeding power to each of the ultraviolet lamps is disposed on one end side in the axial direction inside the housing tube,
Each of the ultraviolet lamps is provided at a position facing each other on the outer surface of the arc tube so that the aperture portion is positioned in a region between the electrodes, and each of the electrodes includes: The light source device for liquid processing according to claim 1, wherein a connection portion to which the power feeding mechanism is electrically connected is formed at one end in the axial direction of the receiving tube.   4. The liquid processing light source device according to claim 3, wherein the electrodes approaching each other in two adjacent ultraviolet lamps have the same potential. The power supply mechanism includes a power supply circuit board on which a first power supply terminal and a second power supply terminal each having an annular circuit pattern independent of each other are formed,
5. Each of the one electrode of each ultraviolet lamp is electrically connected to the first power supply terminal, and the other electrode is electrically connected to the second power supply terminal. The light source device for liquid processing as described in 1.   The liquid processing light source device according to claim 1, wherein an outer tube constituting the housing tube has an ultraviolet shielding property.

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