JPH11273622A - Low pressure mercury vapor discharge lamp unit and fluid sterilization device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase ultraviolet outputs even with a compact size and to thermally protect a lighting circuit. SOLUTION: A low pressure mercury vapor discharge lamp has a pair of electrodes 2 sealed at both ends of the inside of a hermetic container 1 made of an ultraviolet-transmitting material, including a bent part 1a1 and a rectilinear part 1a2 and having an outside diameter of 3 to 12 mm and an overall width of less than 30 mm so that it can form a bent discharge path therein, with mercury and a rare gas sealed in the hermetic container made of quartz glass. The hermetic container 1 has pinch seal parts 1b at both ends, with metallic foil sealed in each pinch seal part 1b, and with the flat surfaces of the pinch seal parts 1b being aligned almost parallel to each other so that the overall width of the lamp can be reduced. The lamp is water-tightly and non-hermetically sealed in a protective tube made of inexpensive, normal quarts glass to constitute a low pressure mercury vapor discharge lamp unit. Further, a fluid sterilization device can be obtained by incorporating the lamp unit therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a low-pressure mercury vapor discharge lamp unit and a fluid sterilizer.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 5-20744 and Japanese Utility Model Laid-Open No.
As described in JP-A-13485, a liquid sterilizing apparatus that disposes an ultraviolet lamp in a liquid flow path and irradiates ultraviolet rays to sterilize a liquid is conventionally known. In this liquid sterilizer, an ultraviolet lamp which is sealed in a liquid by being housed in an ultraviolet transparent protective tube is disposed inside a liquid sterilizer main body having a liquid inlet and a liquid outlet. In many cases, a configuration is used in which liquid is sterilized in the process of flowing a liquid around the protective tube.

An ultraviolet lamp used in a conventional relatively small liquid sterilizing apparatus is a straight-tube low-pressure mercury vapor discharge lamp in which a discharge vessel is made of ultraviolet-permeable glass. This UV lamp has a tube length of 210.5 mm (total length of 226.3 mm or less) in the GL6 type.
UV power of 253.7 nm with lamp power of 6 W is 1
W. Even if the lamp input is further increased, the ultraviolet ray output can hardly be increased.

[0004]

One example of the use of a relatively small liquid sterilizer is water sterilization in a bath for 24 hours. Recently, however, the problem of poor sterilization against Legionella bacteria has been raised.

In order to improve the sterilizing ability, it is necessary to increase the ultraviolet output. However, as described above, the ultraviolet output cannot be further increased.

[0006] If an ultraviolet lamp with a large rated power is used, the ultraviolet output can be increased, but the liquid sterilizer becomes large and expensive, and cannot be widely used in general households. There's a problem.

On the other hand, if the lamp is forcibly made compact, the heat generated by the lamp will reach the lighting circuit, so that a thermal load will be applied to the circuit and the circuit may have a short life.

An object of the present invention is to provide a low-pressure mercury vapor discharge lamp unit and a fluid sterilizing apparatus which are capable of increasing the sterilizing line output while being compact in size, and hardly transmitting heat from the lamp to a lighting circuit. With the goal.

[0009]

A low-pressure mercury vapor discharge lamp unit according to the first aspect of the present invention includes a bent portion and a straight portion, can form a bent discharge path therein, and has flat surfaces substantially parallel to both ends. And a pair of electrodes hermetically sealed with a pair of pinch seals in which metal foil is enclosed, and a pair of electrodes sealed at both ends of the hermetic container via the pinch seals. A low-pressure mercury vapor discharge lamp of an ultraviolet radiation type, comprising: a discharge medium containing mercury and a rare gas enclosed in a container; a low-pressure mercury vapor discharge lamp housed inside, and an open end sealed and supported by a base body. And a holder for sealing and supporting an open end of the protection tube; and a lighting device for a low-pressure mercury vapor discharge lamp provided in the holder. You.

In the present invention and each of the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

Airtight container The airtight container is formed in a U-shape, a W-shape or the like including a bent portion and a straight portion. In order to manufacture such an airtight container, one tube is heated and softened and bent to form a bent discharge path therein. In addition, connecting a plurality of straight pipes with a connecting pipe, closing the ends of the plurality of straight pipes, locally heating and melting the vicinity of the ends, and increasing the internal pressure, thereby connecting by blowing. Form a part,
It is also possible to form a discharge path which is bent by abutting the connecting portions.

In short, in the present invention, the specific structure and the manufacturing method are not limited as long as the hermetic container includes a bent portion and a straight portion and can form a bent discharge path inside.

The airtight container may be made of quartz glass.
It is not limited to a specific material. The outer diameter of the airtight container is desirably 3 to 12 mm. The reason is as follows. That is, if it is less than 3 mm, the lamp voltage becomes too high and becomes impractical. Further, if it exceeds 12 mm, the overall width of the ultraviolet radiation type low-pressure mercury vapor discharge lamp tends to exceed 30 mm,
This is because the size of the fluid sterilizer is increased.

Furthermore, the entire width of the hermetic container can be changed between the vicinity of the bent portion and the vicinity of both ends within the above numerical range. For example, if the entire width near the both ends is made narrower than the vicinity of the bent portion, the width of the die body can be suppressed to less than 30 mm when the die bodies are attached to both end parts.

[0015] The discharge path length of the hermetic container can be appropriately set according to the desired lamp power and the allowable secondary no-load voltage.

Regarding the electrode The electrode may be either a hot cathode or a cold cathode.

When a hot cathode is used, a filament electrode is connected between the inner ends of a pair of introduction wires, and the filament is coated with an electron emitting material.

When a cold cathode is used, a tungsten coil is wound one or two times around the tip of a tungsten electrode shaft and coated with an electron emitting material, or a nickel rod or a nickel cylinder is coated with the electron emitting material. Various known cold cathodes, such as those coated, can be used.

Regarding the Discharge Medium The discharge medium contains mercury and a rare gas, and the mercury can be encapsulated in the form of pure mercury or in the form of amalgam.

As the rare gas, neon, argon, krypton, or the like can be used. In particular, when the encapsulation ratio of neon is increased, the luminous efficiency is increased. But in this case,
Since the startability is reduced, it is necessary to increase the secondary no-load voltage of the lighting device.

In the present invention, the length of the airtight container, which is thinner and longer than the conventional one, is bent, so that the pipe length can be made substantially the same as the conventional one.

Furthermore, in the present invention, the lamp power can be increased to increase the ultraviolet output. For example, when the lamp power is set to 10 W, an ultraviolet output of 2.5 W can be obtained.

According to the present invention, the outer diameter of the airtight container is 3 to 12 m.
m, particularly effective when the overall width is less than 30 mm, but is not limited thereto.

According to the present invention, the airtight container is formed of quartz glass, and the electrodes are sealed via metal foil in a pair of pinch seal portions formed at both ends of the airtight container. Since the metal foil is interposed between the lamp and the lighting circuit, heat generated by the discharge of the lamp is less likely to be transmitted to the lighting circuit. Therefore, the lamp and the lighting circuit can be unitized and brought close to each other. Therefore, the pinch seal method is most suitable for a small hermetic container.

However, in the pinch seal method,
When the pair of pinch seals approach each other because the pinch seals are flat, if the pair of pinch seals are aligned so that they are in the same plane, the pinch seals must not interfere with each other. Inevitably becomes larger.

In the present invention, both ends of the airtight container are arranged so as to be concentrated on one side.

In order to support both ends of the hermetic container with the base, seal portions at both ends of the hermetic container are attached to the base, so that a part of the ultraviolet light emitting portion is shielded by the base and the effective amount of ultraviolet light is reduced. It does not decrease. Particularly when the hermetic container is made of quartz glass to form pinch seal portions at both ends, it is extremely effective if a part of the pinch seal portion is inserted into the base to support the hermetic container. .

When sealing between the base and both ends of the hermetic container as necessary, it is sufficient to bond them together with, for example, a silicone resin.

The base body functions not only to support the wiring to the electrodes, but also to support the ultraviolet radiation type low pressure mercury vapor discharge lamp.

Further, when a low-pressure mercury vapor discharge lamp unit having a protective tube is formed, the base can be used for sealing the protective tube in a liquid-tight manner.

As an ultraviolet-resistant material suitable for use as a base, for example, a fluororesin can be used.

The specific means for sealing and supporting the protective tube on the base body is not limited. For example, the both can be bonded with a silicone resin.

Similarly, in order to seal between the protective tube and the holder, it is possible to use a water-tight, non-hermetic and inexpensive sealing means such as packing or bonding.

The holder can be used, for example, as a mounting portion when the low-pressure mercury vapor discharge lamp unit is mounted on a fluid sterilizer or the like.

The lighting device may be a device mainly composed of an inductor composed of a core and a coil, or a high-frequency inverter. By using a high-frequency inverter, the luminous efficiency of the lamp can be further increased.

In the present invention, since the low-pressure mercury vapor discharge lamp of the ultraviolet radiation type is normally sealed and housed in the protective tube made of quartz glass, the low-pressure mercury vapor discharge lamp unit can be used as it is for the liquid to be treated. It can be used by being immersed in it.

Further, since the lighting device is provided in the holder, the lamp can be lighted only by connecting the low-pressure mercury vapor discharge lamp unit to the power supply, and the handling becomes easy.

Further, since the protective tube mechanically protects the discharge lamp, it is easy to handle and safe even if it is used so as not to be immersed in the liquid to be treated.

The fluid sterilizer according to the second aspect of the present invention is a low-pressure mercury according to the first aspect, wherein the main body is provided with a fluid inlet and a fluid outlet, and is sealed inside the fluid sterilizer. And a vapor discharge lamp unit.

In the present invention, a fluid refers to a substance having fluidity such as a liquid, a gas, and a powder.

The fluid sterilizing apparatus main body is configured so that the fluid to be processed flows through the inside thereof.

The body of the fluid sterilizer can be formed of a suitable material such as metal, synthetic resin, ceramics, glass, etc., but the inner surface is made to reflect ultraviolet rays, so that the sterilization can be effectively performed by using ultraviolet rays. Efficiency can be increased.

In order to make the film reflective to the ultraviolet light, the inner surface may be made of a material having a high ultraviolet reflectivity. A metal having a high ultraviolet reflectivity may be used for the inner surface, or the metal may be plated on the inner surface. In the case of a non-metal such as synthetic resin, ceramics, and glass, a thin metal plate having a large ultraviolet reflectance may be bent and disposed on the inner surface.

In the present invention, the means for sealing the main body of the fluid sterilizer and the low-pressure mercury vapor discharge lamp unit is not limited, but it is preferable that the low-pressure mercury vapor discharge lamp unit be detachable while withstanding the pressure acting on the fluid. In view of the above, it is preferable to use sealing means such as packing.

Thus, in the present invention, the low-pressure discharge lamp unit radiates the fluid to be treated from the fluid inlet to the inside of the fluid sterilization apparatus main body to the fluid outlet. Sterilized by irradiation with ultraviolet rays.

[0046]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a first embodiment of an ultraviolet radiation type low pressure mercury vapor discharge lamp unit according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged cross-sectional view of the main part.

In the figure, 1 is an airtight container, 2 is an electrode, 3
Is a sealing metal foil, 4 is a lead wire, 5 is a base, 6 is a lead wire, and 7 is a connector.

The airtight container 1 is made of transparent quartz glass,
Discharge space 1a, pinch seal 1b, exhaust tip 1
c and a protective film 1d.

The discharge space 1a is formed by bending a straight pipe having an outer diameter of 6 mm and an inner space length of 300 mm into a U-shape, and has a total width of 18 mm.
mm, and the total length is 152 mm. That is, two straight portions 1a1 and 1a1 and a bent portion 1a2 are provided.

The pinch seals 1b, 1b are formed at both ends of the discharge space 1a, and have a decentered plane. The deflected planes of the pinch seal portions 1b, 1b are aligned parallel to each other.

The exhaust tip portion 1c is formed in a straight portion 1a1 separated from the tip of the bent portion 1a2 of the airtight container 1 by 50 mm.

The protective film 1 d is formed by depositing fine particles of alumina, and is formed on the main part of the inner surface of the discharge space 1 a of the hermetic container 1. The main part refers to a discharge space between the distal ends of the electrodes 2 described below.

The electrode 2 comprises an electrode main portion 2a and an electrode shaft 2
b, and are sealed at both ends in the airtight container 1.

The electrode main part 2a is of a cold cathode type, and is composed of a tungsten coil wound twice around the tip of the electrode shaft 2b and an electron emitting material applied to the coil.

The electrode shaft 2b is made of a tungsten rod, and its base end is embedded in the pinch seal portion 1b.

The sealing metal foil 3 is made of molybdenum foil,
Since the airtight container 1 is airtightly embedded in the pinch seal portion 1b, the current is introduced into the electrode 2 while the airtight container 1 is kept airtight. The base end of the electrode shaft 2b is welded to one end of the sealing metal foil 3, and the sealing metal foil 3
A lead wire 4 is welded to the other end.

The airtight container 1 is filled with mercury as a discharge medium and a rare gas consisting of 98% neon and 2% argon at a partial pressure ratio of 90 torr.

The base member 5 is formed by molding a fluororesin into a substantially cylindrical shape, and is formed at the lower ends thereof with rectangular holes for receiving the pinch seal portions 1b, 1b of the pair of hermetic containers 1 separated from each other. In addition, a lead wire 6 connected to the introduction wire 4 extends from the upper end of the base body 5. Further, a locking flange 5a having an outer diameter of 25.5 mm is formed on the outer periphery of the upper end of the base body 5. The pinch seal portions 1b, 1b are hermetically fixed to the base body 5 with a silicone adhesive.

A connector 7 is connected to the other end of the lead wire 6. The connector 7 is connected to a lighting device (not shown).

The ultraviolet radiation type low-pressure mercury vapor discharge lamp described above has a total length of 190 mm and a total width of 25.5 mm, which is the outer diameter of the flange 5 a of the base body 5.

When this discharge lamp was lit at a lighting frequency of 40 KHz using a high-frequency inverter as a lighting device, a lamp voltage of 500 V, a lamp current of 20 mA,
The lamp input was 10W. The UV output is 2.5
W.

FIG. 4 is a front view showing a second embodiment of the ultraviolet radiation type low pressure mercury vapor discharge lamp unit of the present invention.

FIG. 5 is a side view of the same.

In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, a support 8 having the same outer shape as the base 5 'is mounted on the bent portion 1a2 of the airtight container 1. The support 8 has a screw hole 8a.

The lead wire 6 is covered with an insulating tube 6a made of silicone resin.

In the ultraviolet radiation type low pressure mercury vapor discharge lamp, the total width of the hermetic container is 18 mm, the total length of the lamp is 163 mm, and the total width of the lamp is 21 mm, which is the outer diameter of the base 5 '.

Therefore, in the case of the present embodiment, it can be housed in a protective tube having an inner diameter of 21 mm.

FIG. 6 is a front view showing a third embodiment of the ultraviolet radiation type low pressure mercury vapor discharge lamp unit of the present invention.

FIG. 7 is a side view of the same.

In this embodiment, the airtight container 1 "is composed of four straight portions 1a1" and three bent portions 1a2 ". Therefore, the outer diameter of the base 5" is relatively large. 1 and the discharge path length is about twice that of the first embodiment shown in FIG. 2, and the lamp input is 20 W and the ultraviolet output is 5 W.

FIG. 8 is a central sectional front view showing one embodiment of the low-pressure mercury vapor discharge lamp unit of the present invention.

In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

That is, 9 is an ultraviolet radiation type low pressure mercury vapor discharge lamp, 10 is a protective tube, 11 is a holder, 12 is packing, 13 is a tightening ring, 14 is an O-ring, 15 is a cover, and 16 is a lighting device. is there.

The protection tube 10 is made of transparent ordinary quartz glass and has a bottomed cylindrical shape. The protective tube 10 accommodates the ultraviolet radiation type low-pressure mercury vapor discharge lamp 9 shown in FIGS. 1 and 2, and the open end 10 a of the protective tube 10 is water-tight by simply using a silicone adhesive on the outer peripheral portion of the base body 5. Is sealed and fixed.

The holder 11 is made of aluminum die-cast and has a hollow shape as a whole, and has a lower end formed with a lower end opening 11a large enough to allow the protection tube 10 to pass therethrough. The fastening screw hole 11b of the size which can be performed is formed. The lower end opening 11a of the holder 11 and the fastening screw hole 11b communicate with each other inside,
Further, a tapered surface 11c is formed below the fastening screw hole 11b. Further, a peripheral groove 11d is formed in a lower portion of the outer peripheral surface of the holder 11, and a locking flange 1
1e is formed, and a support flange 11f is formed at the upper end.

The packing 12 has a ring shape with a wedge-shaped cross section, and is arranged on the tapered surface 11 c of the holder 11. The fastening ring 13 has a peripheral step portion 13a formed on the lower inner surface and a thread groove 13b formed on the outer peripheral surface. Prior to the storage of the ultraviolet radiation type low-pressure mercury vapor discharge lamp 9 in the protective tube 10, the tightening ring 13 is
Is mounted from the airtight container 1 side, and is rotatably locked to the flange 5a of the base body 5. Thereafter, when the protective tube 10 is fixed to the base body 5, the fastening ring 13 is prevented from falling.

After arranging the packing 12 on the tapered surface 11c of the holder 11, the protective tube 10 is inserted into the packing 13, and the screw ring 13b of the tightening ring 13 is screwed into the screw hole 11b for tightening of the holder 11. Then tightening ring 1
The lower part of 3 abuts on the upper end of packing 12 and presses downward. As a result, the packing 12 is pushed down along the tapered surface, so that the packing 12 is deformed and pressed against the tapered surface 11 c of the protective tube 10 and the holder 11. As a result, the protection tube 10 is sealed and attached to the holder 11.

The O-ring 14 is attached to the peripheral groove 11 d of the holder 11.
And a part thereof protrudes outward from the peripheral surface of the holder 11. The O-ring 14 functions as a seal when the low-pressure mercury vapor discharge lamp unit is sealed and mounted on the sterilizer main body. Packing 12, tightening ring 1
3 is a watertight structure.

The cover 15 is provided with a support flange 11f of the holder 11.
The lighting device 16 and a terminal block are accommodated therein.

FIG. 9 is a circuit diagram showing a high-frequency inverter in one embodiment of the low-pressure mercury vapor discharge lamp unit of the present invention.

In the drawing, reference numeral 9 denotes an ultraviolet radiation type low-pressure mercury vapor discharge lamp; 17a and 17b, DC power supply terminals;
a and 18b are a pair of switching means, 19 is an output transformer, 20 is an inductor, 21 is a current fuse, 22 is a resonance capacitor, 23 is a ballast capacitor, 24
Is a high frequency output terminal.

The DC power supply terminal 17a on the positive electrode side is connected to the middle point of the primary winding 19P of the output transformer 19 via the current fuse 21 and the inductor 20 in series.

The negative DC power supply terminal 17b is connected to both ends of the primary winding 19P of the output transformer 19 via a pair of switching means 18a and 18b.

Transistors are used as the switching means 18a and 18b, and their control poles or bases are
Each is connected to the DC power supply terminal 17a on the positive electrode side via a starting resistor RS.

The tertiary winding 19T of the output transformer 19 is connected to control poles of the switching means 18a and 18b.

The resonance capacitor 22 is connected to the output transformer 1
9 are connected to both ends of a primary winding 19P.

Both ends of the secondary winding 19S of the output transformer 19 are connected to a high-frequency output terminal 24 via a ballast capacitor 23 in series. Further, the DC power supply terminal 17b on the negative electrode side and one end of the secondary winding 19S of the output transformer 19 are conductively connected.

The high-frequency inverter described above constitutes a so-called parallel inverter.
By alternately turning on and off 8a and 18b, a sine-wave high-frequency AC voltage can be obtained between the high-frequency output terminals 24.

Then, since the high frequency voltage is applied between the electrodes 2 and 2 of the ultraviolet radiation type low pressure mercury vapor discharge lamp 9 via the ballast capacitor 23, the lamp 9 is turned on at a high frequency to generate ultraviolet rays. I do.

FIG. 10 is a partial front sectional view showing an embodiment of the fluid sterilizer of the present invention.

In the figure, the same parts as those in FIG. 8 are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 25 denotes a fluid sterilizer main body, and reference numeral 26 denotes a low-pressure mercury vapor discharge lamp unit.

The fluid sterilizer main body 25 is made by molding a synthetic resin, and has a tubular portion 25a, a fluid inlet 25,
b, a fluid outlet 25c and an ultraviolet reflector 25d.

The lower end of the cylindrical portion 25a is closed by a bottom plate portion 25a1, and an opening 25a2 is formed at the upper end.

The guide portion 25a3 of the protection tube 10 is formed on the bottom plate portion 25a1 so as to protrude from the inner surface.

The fluid inlet 25b is provided near the lower end of the cylindrical portion 25a.

The fluid outlet 25c is arranged near the upper end of the cylindrical portion 25a.

Thus, the fluid to be sterilized flows through the inside of the fluid sterilization apparatus main body 25.

The ultraviolet reflector 25d is formed by bending an aluminum thin plate and mounting it on the inner surface of the cylindrical portion 25a.

The low-pressure mercury vapor discharge lamp unit 26 comprises:
The locking collar 1 of the holder 11 is the same as that shown in FIG.
1e is fitted on the opening 25a2 of the fluid sterilization apparatus main body 25 in a state where it is locked to the fluid in a state of being locked. The sealing is performed by the O-ring 14 mounted on the peripheral surface of the holder 11 being pressed against the inner surface of the opening 25a2.

Then, while the fluid to be sterilized, eg, water, flows in through the fluid inlet 25b, rises in the cylindrical portion 25a, and flows out of the fluid outlet 25c, it is emitted from the low-pressure mercury vapor discharge lamp 9. Ultraviolet rays pass through the protective tube 10 and irradiate the fluid, whereby the fluid is sterilized, and the sterilized fluid can be obtained from the fluid outlet 25c. UV reflector 2
5d reflects the incident ultraviolet rays and can be used again for sterilization, so that the sterilization efficiency is improved.

[0106]

According to the first aspect of the present invention, the entire width can be minimized by aligning the pair of pinch seals formed at both ends of the hermetic container made of quartz glass at substantially the same plane, so that the entire width can be minimized. Can be compact size. In addition, the airtight container is made of quartz glass, and the electrodes are sealed via metal foil in a pair of pinch seals formed at both ends of the airtight container, so that the metal foil is interposed between the lamp and the lighting circuit. Therefore, it is difficult for the heat generated by the discharge of the lamp to be transmitted to the lighting circuit. Therefore, the lamp and the lighting circuit can be unitized and brought close to each other. Therefore, the pinch seal method is most suitable for a small hermetic container.

According to the second aspect of the present invention, it is possible to provide a fluid sterilizing apparatus having the effects of the first to fifth aspects.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of an ultraviolet radiation type mercury vapor discharge lamp unit of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged sectional view of a main part of the same.

FIG. 4 is a front view showing a second embodiment of the ultraviolet radiation type mercury vapor discharge lamp unit of the present invention.

FIG. 5 is a side view of the same.

FIG. 6 is a front view showing a third embodiment of the ultraviolet radiation type mercury vapor discharge lamp unit of the present invention.

FIG. 7 is a side view of the same.

FIG. 8 is a central sectional front view showing one embodiment of the low-pressure mercury vapor discharge lamp unit of the present invention.

FIG. 9 is a circuit diagram showing a high-frequency inverter in one embodiment of the low-pressure mercury vapor discharge lamp unit of the present invention.

FIG. 10 is a partial front sectional view showing one embodiment of the fluid sterilization apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Airtight container 1a ... Discharge space part 1a1 ... Linear part 1a2 ... Bend part 1b ... Pinch seal part 1c ... Exhaust chip part 2 ... Electrode 2a ... Electrode main part 2b ... Electrode shaft 3 ... Metal foil 35 ... Base body 6 ... Lead Wire 7 ... Connector

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yasutaka Gogami 3-3-9, Shimbashi, Minato-ku, Tokyo Inside Toshiba A-V E Corporation

Claims (2)

[Claims] 1. A pair of pinch seal portions including a bent portion and a straight portion, capable of forming a bent discharge path therein, having flat surfaces aligned substantially parallel at both ends, and enclosing a metal foil therein. An airtight container made of quartz glass, a pair of electrodes sealed at both ends of the airtight container via a pinch seal portion, and a discharge medium containing mercury and a rare gas sealed in the airtight container. A radial low-pressure mercury vapor discharge lamp; a protective tube made of ordinary quartz glass, which houses the low-pressure mercury vapor discharge lamp and has an open end sealed with a base; and a seal at the open end of the protective tube. A low-pressure mercury vapor discharge lamp unit, comprising: a holder for supporting the lamp; and a lighting device for a low-pressure mercury vapor discharge lamp provided in the holder. 2. A fluid sterilizer main body having a fluid inlet and a fluid outlet, and the low-pressure mercury vapor discharge lamp unit according to claim 1, which is sealed and disposed in the fluid sterilizer main body. A fluid sterilization device characterized by the following.