JP2585189B2 - Overheat prevention light irradiation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sterilizing, decomposing, or synthesizing a fluid composed of a liquid, a gas or a mixture thereof with light such as ultraviolet rays or infrared rays emitted from a light source, and converting the fluid to light. More particularly, the present invention relates to an overheat preventing light irradiating apparatus for preventing a light source from being overheated to a predetermined temperature or more by an overheated fluid.

[0002]

2. Description of the Related Art Conventionally, generally, for example, LSI and super LS
In the production of I, pure water or ultrapure water is used in many cleaning steps, and it is known to use short-wavelength ultraviolet rays to produce the pure water or ultrapure water (for example, ,
JP-A-1-164488, JP-A-1-28438
No. 5). The short-wavelength ultraviolet light supplies high dissociation energy to chemical bonds, so that, for example, an organic substance or the like contained in water can be dissociated by a photochemical reaction. Ultrapure water can be obtained.

In the field of biotechnology and its related fields, for example, liquids such as sugar solutions, starch emulsions, and white water, or gases such as nitrogen and inert gases are sterilized and decomposed.
Alternatively, ultraviolet light having a short wavelength is also used for performing chemical treatment such as synthesis. Since this ultraviolet ray has a bactericidal action, a physiological action and the like in addition to the above-mentioned photoreaction, it is widely used for light treatment such as sterilization, decomposition, and synthesis of various liquids and gases.

[0004] Devices for irradiating ultraviolet rays for such a purpose are roughly classified into an internal illumination type that irradiates ultraviolet rays from inside a fluid and an external illumination type that irradiates ultraviolet rays from outside a fluid. Among these, the internally illuminated light irradiation device includes a cavity into which a fluid to be irradiated with ultraviolet light flows, and an ultraviolet lamp for irradiating ultraviolet light, and the ultraviolet lamp is formed of an ultraviolet transmitting material such as quartz glass or synthetic resin. And inserted into the hollow body. Further, in the external illumination light irradiation device, a hollow body through which a fluid flows is formed of an ultraviolet transmitting material such as quartz glass or synthetic resin, and an ultraviolet lamp is provided outside the hollow body. Such a configuration is the same in the case of an apparatus that uses an infrared lamp as a light source and performs light treatment such as sterilization, decomposition, and synthesis using infrared light emitted from the infrared lamp.

[0005] In the internally illuminated light irradiation device, a fluid is introduced into the cavity from a fluid supply source connected to the inlet of the cavity, and after the fluid is sterilized by ultraviolet rays irradiated from the inside, It is configured to be pressed by the newly introduced fluid and discharged from the outlet. On the other hand, in the external illumination type light irradiation device, the fluid introduced into the hollow body is sterilized by ultraviolet rays irradiated from the outside, and then pressed by the newly introduced fluid and discharged from the outlet. Is configured.

In the case of using such an externally illuminated or internally illuminated light irradiating device to sterilize, for example, water as a fluid by irradiating ultraviolet rays, it is necessary to sterilize immediately before the water is used. Preferably, if too much time is left after the sterilization, the sterilization effect may be weakened and water may not be used. However, although it depends on various conditions such as the production system of a factory or the working hours of workers, it is efficient to perform sterilization treatment by ultraviolet rays when water is required, Sterilization is uneconomical. Therefore, it is common to stop the water except when necessary.

[0007] On the other hand, if the energization and power failure of the ultraviolet lamp are repeated in accordance with the supply and stop of water, the life of the ultraviolet lamp is greatly reduced, which is not only uneconomical, but also requires replacement of the ultraviolet lamp. And the working efficiency is remarkably deteriorated. Therefore, in general, it is more economical to turn on the ultraviolet lamp as it is even when the flow of water is stopped and to improve the life of the ultraviolet lamp.

[0008]

However, in the above-described conventional light irradiation apparatus, the ultraviolet lamp is continuously turned on even after the flow of the fluid is stopped. The fluid in the cavity is heated and the heat is stored in the fluid. As a result, when the temperature of the fluid rises above a predetermined level, the fluid may burn and become scorched or cause a structural change, or may not only be excessively decomposed or reacted excessively, but also reverse due to heat accumulated in the fluid. However, there is a problem in that the ultraviolet lamp is overheated, whereby the output of the ultraviolet lamp is halved and the life is shortened.

The present invention has been made in view of such a conventional problem, and detects the temperature of a fluid on the outlet side of a hollow body, and when the temperature of the fluid rises above a predetermined level, the fluid is hollowed out. By discharging the light from the body, it is possible to prevent tissue change of the fluid around the light source and to lower the temperature of the light source to prevent the output of the light source from lowering and to improve the life.

[0010]

SUMMARY OF THE INVENTION The overheating preventing light irradiation apparatus of the present invention solves the above-mentioned problems and the like and achieves the above-mentioned object by, for example, using a fluid as shown in FIGS. A hollow body (1,31,41) having an inlet (4,42) and an outlet (5,43) for P;
(1,41) inside or outside and a hollow body (1,41).
31, 41), a light source 2 for irradiating light to a fluid P flowing in the fluid P and subjecting the fluid P to light treatment such as sterilization, decomposition, synthesis, etc., and a hollow body from the inlet (4, 42) by pressurizing the fluid P. (1,3
1, 41), and a fluid supply source 3 for discharging the fluid P in the hollow body (1, 31, 41) from the outlet (5, 43) by the pressure of the fluid P. In the irradiation device, a temperature detecting means 11 for detecting the temperature of the fluid P on the outlet (5, 43) side;
A drain pipe 13 having a relief valve 14 openable and closable with the fluid P based on a detection result of the temperature detecting means 11.
Is heated to a predetermined temperature or higher, the relief valve 14 is opened to allow the fluid P supplied from the fluid supply source 3 to flow through the hollow body (1, 3).
1, 41), and the superheated fluid P
Control means 2 for discharging water from the drain line 13 to the outside
2 is provided.

The overheating preventing light irradiating apparatus according to the present invention comprises, for example, as shown in FIGS.
It is good to arrange inside 1) and to irradiate light from inside fluid P.

Further, the overheating preventing light irradiating apparatus according to the present invention has a configuration in which the light source 2 is disposed outside the hollow body 41 and irradiates light from outside the fluid P as shown in FIG. 4, for example. Good.

Further, as shown in FIGS. 1 to 4, for example, as shown in FIGS. 1 to 4, the temperature detecting means of the overheating preventing light irradiation apparatus according to the present invention may be provided at or near the outlet (5, 43).
In this case, the thermometer 11 may be configured such that the temperature detector 11a is disposed on the end surfaces 1b and 31b of the hollow bodies 1 and 31 and the connection pipe 45 in FIG.

When the temperature detecting means of the overheating prevention light irradiation device according to the present invention is the thermometer 11, for example,
It is preferable to provide a display unit for displaying the detected temperature as a digital value or an analog value.

Furthermore, the tip of the drain line 13 of the overheating preventing light irradiation apparatus according to the present invention is directly fixed to the hollow body 1 or 31 in FIGS. 1 and 3, for example, and the hollow body 1 is mounted in FIG. It may be fixed to a mounting base 18 as a fixing member to be placed via a bracket 17, and in FIG. 4, it may be fixed to a casing 40 as a fixing member via the bracket 17.

The drain line 13 of the overheat prevention light irradiation device according to the present invention prevents external air from flowing toward the hollow body (1, 31, 41) when the relief valve 14 is opened, for example. A check valve 15 may be provided.

Further, the drain line 13 of the overheating preventing light irradiation apparatus according to the present invention may be provided, for example, continuously at the end of the outlet 5 as shown in FIG.

[0018]

According to the present invention having the above-described structure,
The temperature detecting means 11 detects the temperature of the fluid P at the outlet (5, 43) side, and when the temperature of the fluid P is overheated to a predetermined temperature or higher based on the detection result, the temperature control means 22 controls the release valve 14. Is opened to discharge the superheated fluid P to the outside through the drain pipe 13 connected to the outlet (5, 43), so that the temperature of the fluid P in the hollow body (1, 31, 41) is always kept at a predetermined temperature or lower. Thus, the output of the light source 2 can be prevented from lowering, and the life can be improved.

By arranging the light source 2 inside the hollow body (1, 31) and irradiating light from the inside, the structure of the overheating preventing light irradiation device can be made suitable.

Also, by arranging the light source 2 outside the hollow body 41 and irradiating light from the outside, the overheating preventing light irradiating apparatus can have a suitable structure.

Further, the temperature detecting means is a thermometer 11,
By arranging the temperature detecting unit 11a at or near the outlet (5, 43), the temperature of the fluid P in the outlet (5, 43) or the temperature in the vicinity thereof is accurately detected.

By providing the thermometer 11 with a display unit, the detected temperature can be displayed in a digital or analog value so as to be easily understood.

Further, the tip of the drain pipe 13 is connected to the hollow body (1, 31) or the mounting base 1 which is a fixing member for the hollow body.
8. By fixing to the casing 40 or the like, the vibration and the like of the drain pipe 13 can be prevented, whereby the superheated fluid P is safely discharged to the outside.

The check valve 15 is provided in the drain line 13.
Is provided, when the relief valve 14 is opened, external air does not flow toward the hollow body (1, 31, 41).

Further, by providing the drain pipe 13 continuously at the end of the outlet 5, the piping system can be simplified.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, FIG. 3 shows a second embodiment of the present invention, FIG. 4 shows a third embodiment of the present invention, FIG. 5 shows a fourth embodiment of the present invention, and FIG. 2 shows specific usage examples of the present invention.

The first embodiment of the present invention shown in FIGS. 1 and 2 is applied to an internally illuminated overheating preventing light irradiation apparatus A in which a fluid is passed outside a light source. The overheating prevention light irradiation device A includes a hollow cavity 1, an ultraviolet lamp 2 as a specific example of a light source, and a fluid supply source for introducing water P as a specific example of a fluid into the cavity 1. A water supply device 3 and the like showing specific examples are provided. That is, the overheat prevention light irradiation device A according to this embodiment is an ultraviolet sterilization device for sterilizing the water P with ultraviolet light, and the ultraviolet light applied to the water P is a specific example of light.

A hollow body 1 shown in FIG.
a, and end faces 1b and 1c that close both ends in the axial direction (vertical direction in FIG. 1) of the body 1a. In the lower part of the body 1a, an inflow port 4 of water P is opened laterally. An outlet 5 for water P is provided at the upper part of the body 1a.
The drain port 6 is provided so as to open laterally. The supply port 3a of the water supply device 3 is provided at the inflow port 4 of the hollow body 1.
The water P introduced into the hollow body 1 from the supply port 3a via the inflow port 4 is sealed in the hollow body 1 and irradiated with ultraviolet rays. The supply port 3a is provided with a supply valve (not shown), and the flow rate can be arbitrarily adjusted by changing the opening of the supply valve.

At the center of the upper end surface 1b of the hollow body 1, there is formed a circular two-stage opening 7 having a larger outer diameter so as to penetrate in the vertical direction. A ring-shaped mounting member 8 is fitted except for the small diameter side housing portion 7a, and is fixed by fixing means such as bolts.
This mounting member 8 has a through hole 8 penetrating in its thickness direction.
a is formed, and one end of the tubular body 9 is inserted into the hollow body 1 through the through hole 8 a and the opening 7. An O-ring 10 made of rubber, synthetic resin, or the like housed in the housing portion 7a is pressed against the outer peripheral surface of the other end of the tubular body 9, and the O-ring 10 functions as a sealing material to form an opening. 7 is secured.

The tube 9 has one end in the longitudinal direction closed and the other end opened, and is formed of an ultraviolet transmitting material such as quartz glass. Then, an ultraviolet lamp 2 (e.g., an ultraviolet ray having a wavelength of 320 nm or less is emitted) is inserted into the tube 9 from the opening end side of the tube 9. The ultraviolet lamp 2 is positioned and fixed by an appropriate member (not shown) so as to be at a position separated from the inner wall surface of the tube 9 by a desired distance. Thereby, a space V is formed between the water P sealed in the hollow body 1 and the ultraviolet lamp 2. The space V is filled with an inert gas such as nitrogen or is evacuated, and the energy of ultraviolet light emitted from the ultraviolet lamp 2 is, for example,
It is used to cause a photochemical reaction with oxygen / ozone in the air existing in the space V, and is set so that the energy efficiency given to the water P does not decrease.

The outlet 5 is provided with a thermometer 11, which is a specific example of a temperature detecting means for detecting the temperature of the water P in the outlet 5. The thermometer 11 has a tip inserted into the water P and detects the temperature thereof. The thermometer 11 converts the temperature detected by the temperature detector 11a into a predetermined electric signal to the water supply device 3. And a signal transmitting unit 11b for transmitting. As a function of the thermometer 11, a function that can easily set the upper limit value and the lower limit value of the temperature is preferable.

The thermometer 11 having such a configuration is fixed to a mounting plug 12 formed of an appropriate material such as rubber, synthetic resin, metal or the like. The attachment plug 12 is detachably attached to an attachment portion 5a formed in the outlet 5 by, for example, screw connection, and the thermometer 11 is fixed to the hollow body 1 in this manner. In this state, the temperature detector 11a of the thermometer 11 is disposed in the outlet 5, so that the temperature of the water P in the outlet 5 can be detected. The temperature of the water P detected in this manner is determined by the signal transmitting unit 11 of the thermometer 11.
The signal b is converted into an electric signal and output to the outside. Note that the thermometer 11 may be configured so that the temperature detector 11a does not directly contact the water P as a fluid. That is, for example, a temperature detection unit 11 a is provided in close contact with the outside of the outlet 5 to detect heat transmitted through the hollow body 1, and the temperature of the water P is indirectly transmitted through the hollow body 1. May be detected.

Although not shown, the thermometer 11 may be provided with a display for displaying the detected temperature. The display means of this display unit may display digital values, or may display analog values. By providing the indicator on the thermometer 11 in this manner, the temperature of the water P on the outlet 5 side can be visually recognized.

Furthermore, a drain pipe 13 is connected to the drain port 6. When the temperature of the water P in the outlet 5 rises to a predetermined temperature or higher, the drain pipe 13 allows the water P to escape to the outside to maintain the temperature of the water P in the hollow body 1 at a predetermined temperature or lower. And comprises a relief valve 14 attached to the tip of the drain port 6, a check valve 15 connected to the relief valve 14, and a drain pipe 16 connected to the check valve 15. I have. And drain pipe 1
The distal end of 6 is directly fixed to the hollow body 1 (in FIG. 2, a bracket 17 fixed to a mounting base 18 on which the hollow body 1 is placed) by a fixing portion 1 d provided in the hollow body 1.

As described above, the reason why the tip of the drain pipe 13 is fixed to the hollow body 1 or the mounting base 18 as a fixing member thereof is that the drainage of the water P is also caused by the pressure fluctuation when the water P is discharged from the drain pipe 13. This is to prevent the pipe 16 from moving. That is, since the temperature of the water P discharged from the drain pipe 13 is high, for example,
When the tip of the pipe is formed of a synthetic resin pipe or the like that is softened by heat, it is possible to move around freely due to pressure fluctuations in the pipe and so forth, and to apply hot water P to a nearby person. That's why.

The relief valve 14 is connected to the drain line 13
The opening / closing operation is automatically performed by a control signal output from the water supply device 3, but can be opened / closed by a manual operation of an operator.
Therefore, the water supply device 3 is provided with a changeover switch 20 for switching the operation of the relief valve 14 between automatic and manual. As the relief valve 14, for example, an electromagnetic switching valve, a pneumatic rotary valve, an electromagnetic ball valve, and other various opening / closing valves using electric or pneumatic pressure can be applied. The check valve 15 is for preventing external air from flowing into the hollow body 1 when the relief valve 14 is opened, thereby preventing introduction of outside air into the hollow body 1. This prevents contamination or alteration of the water P due to outside air or the like.

The water supply device 3 for opening and closing the relief valve 14 includes a water supply unit 21 including a pressurizing pump for sending out water P to be sterilized by the ultraviolet lamp 2, a motor as a power source, and the like. It receives a temperature detection signal sent from the thermometer 11, outputs a control signal based on this detection signal, opens and closes the relief valve 14, and outputs a drive signal for the water supply unit 21 to output new water P. And a temperature control unit 22 for introducing the gas into the hollow body 1. Then, the temperature control unit 22
Is a processing device such as a microcomputer that determines whether the temperature of the water P at the outlet 5 has risen above a predetermined temperature and has fallen below a predetermined temperature based on a temperature detection signal in order to perform the above control. And a storage device for storing a reference temperature or the like to be compared with the detected temperature, a drive device for outputting a control signal based on a processing result of the processing device, and the like.

As the temperature conditions of the temperature control unit 22 having such a configuration, for example, in this embodiment, the upper reference temperature is set to 55 ° C., and the lower reference temperature is set to 30 ° C. . That is, the temperature of the water P in the outlet 5 is detected by the thermometer 11 (the temperature may be constantly detected, or may be detected at a fixed time interval).
When the temperature reaches 5 ° C., the relief valve 14 is opened and the water supply unit 2 is opened.
1 is driven to introduce new water P into the hollow body 1, and the superheated water P in the hollow body 1 is pushed out from the drain port 6 to the drain pipe 13 by the pressure. Thereafter, when the temperature of the water P in the outlet 5 drops to 30 ° C., the relief valve 14 is closed and the driving of the water supply unit 21 is stopped.

FIG. 2 shows a specific configuration of the embodiment shown in FIG. 1, in which the hollow body 1 is mounted on the mounting base 18 by four legs 23. In FIG. 2, reference numeral 24 denotes a drain valve attached to the lower surface of the hollow body 1,
An upper cover 25 covers the upper surface of the hollow body 1. Further, reference numeral 26 denotes a power switch for both turning on the ultraviolet lamp 2 and driving the water supply device 3, and reference numeral 27 denotes a stabilizer for the ultraviolet lamp 2. And an automatic / manual changeover switch 20
Is usually used by selecting automatic, in which temperature control is automatically performed.

The operation of the overheating preventing light irradiation apparatus A of the present embodiment having the above-described configuration is, for example, as follows. First, the supply valve, relief valve 14 and drain valve 24 of the water supply device 3 are all closed.
Is supplied to supply electric power to the ultraviolet lamp 2 and the water supply device 3 so that the ultraviolet lamp 2 emits light and the water supply device 3 is driven.

Next, the supply valve is gradually opened to start water supply, the changeover switch 20 is turned on manually, the relief valve 24 is opened, and the air in the hollow body 1 is discharged from the drain line 13 to the outside. I do. After discharging this air, the relief valve 24 is closed and the changeover switch 20 is switched to the automatic side. Then, the opening degree of the supply valve is adjusted to set the water P introduced into the hollow body 1 to a reference flow rate. As a result, the water P introduced into the hollow body 1 flows upward from below in the hollow body 1, is exposed to ultraviolet rays emitted from the ultraviolet lamp 2 during this time, and is sterilized. Will be leaked.

As described above, while the water P continues to flow, fresh water P is constantly in contact with the outer peripheral surface of the tube 9 covering the ultraviolet lamp 2, so that the space is generated by the discharge of the ultraviolet lamp 2. The heat transmitted to the tube 9 through the portion V is not taken by the water P flowing on the outer periphery and accumulated in the tube 9. Therefore, even if the ultraviolet lamp 2 generates heat, the heat is not always taken by the water P and does not accumulate in the ultraviolet lamp 2.

Next, the operation of the water supply unit 21 of the water supply device 3 is stopped to stop the flow of the water P, or
When the flow of the water P is stopped by closing the outlet at the end connected to the outlet 5 in a state in which the UV lamp 2 is operated, the UV lamp 2 remains lit. It is transmitted to the pipe 9 via the part V, and this pipe 9
To the surrounding water P. In this case, since the water P surrounding the periphery of the tubular body 9 does not flow, the heat transmitted to the tubular body 9 is absorbed by the surrounding water P and accumulated in the water P, whereby the surrounding water P The temperature rises.

As a result, the temperature around the ultraviolet lamp 2 becomes 50
When the temperature rise is detected by the temperature detector 11a of the thermometer 11 installed in the outlet 5, the detection signal is sent from the signal transmitter 11b to the temperature controller of the water supply device 3. 22. As a result, a control signal is output from the temperature detecting section 11a to the relief valve 14, and the relief valve 14 is opened by the control signal. This allows
When the pressure pump of the water supply unit 21 of the water supply device 3 is constantly driven, new water P discharged from the pressure pump is introduced into the hollow body 1. As a result, the hollow body 1
The water P inside, that is, the water P superheated by the heat of the ultraviolet lamp 2 is pressed by the newly introduced water P and is pushed out from the drain port 6 into the drain pipe 13.

On the other hand, if the pressurizing pump of the water supply unit 21 of the water supply device 3 is stopped when the relief valve 14 is opened, the drive signal for driving the pressurizing pump is transmitted as described above. It is output together with a control signal, and the driving signal drives the pressurizing pump. As a result, new water P is introduced into the hollow body 1, and by this newly introduced water P,
Superheated water in the hollow body 1 heated by the heat of the ultraviolet lamp 2 is pushed out from the drain port 6 into the drain pipe 13 in the same manner as described above.

Then, the water P pushed out into the drain pipe 13 is discharged from the drain pipe 16 to the outside via the relief valve 14 and the check valve 15 which are automatically opened. Therefore,
Around the pipe 9 is fresh water P having a low temperature before being overheated.
Is introduced, and the heat newly generated in the ultraviolet lamp 2 is absorbed by the flow of the newly supplied water P, so that the ultraviolet lamp 2 can be prevented from rising to a predetermined temperature or higher.

In this case, a check valve 15 is provided downstream of the relief valve 14, and the external air flows back into the hollow body 1 even when the relief valve 14 is opened. Is prevented, the sterilized water P in the hollow body 1 is not contaminated by the outside air. In addition, since the tip of the drain pipe 16 is fixed to the hollow body 1, the drain pipe 16 does not move around randomly due to a change in pressure in the drain pipe 13 or the like. Without this, the safety of the device can be ensured.

Next, by exchanging the water P as described above,
When the temperature of the water P in the hollow body 1 drops to 30 ° C. or less and the temperature drop is detected by the thermometer 11, a detection signal is sent to the temperature control unit 22. Thereby, the temperature control unit 2
2 stops the output of the control signal and closes the relief valve 14, and if necessary, stops the output of the drive signal and stops the pressurizing pump to stop driving the water supply unit 21. As a result, the hollow body 1
The supply of new water P into the inside is stopped.

Thereafter, when the water P is heated again and rises above a predetermined temperature, the water supply device 3, the thermometer 11, and the relief valve 1
4 operates as described above, and constantly adjusts the water P in the hollow body 1 within a constant temperature range. Therefore, since the ultraviolet lamp 2 is not overheated by the surrounding water P and is always maintained within the predetermined temperature range, it is possible to always obtain a good sterilizing effect without lowering the lamp efficiency. it can.

In general, the temperature of the outer peripheral surface when the ultraviolet lamp 2 is turned on is 15 ° C. to 40 ° C. When the outer peripheral surface temperature rises to 80 ° C., the lamp output is reduced by half, and the sterilizing effect is significantly reduced. In addition, the life is greatly shortened. However, in this embodiment, when the temperature of the water P near the outlet 5 exceeds 50 ° C., the superheated water P
Is discharged from the drain pipe 13 and the temperature of the water P is 30 ° C.
Since the discharge of the water P from the drain pipe 13 is stopped when the temperature falls below, the ultraviolet lamp 2 can always be used in an optimal state, the output is prevented from being lowered, and the life is improved. Can be.

The second embodiment of the present invention shown in FIG. 3 shows another example of the internally illuminated overheating prevention light irradiation device A, and a tube 30 is provided.
Are configured to be held by the hollow body 31 at both ends in the longitudinal direction. In the hollow body 31, openings 32 are formed in end face portions 31b and 31c located at both ends in the axial direction, respectively. An opening 4 and an outlet 5 are formed in the body 31a as in the first embodiment. A drain port 6 is provided. The tube 30 penetrates the openings 32, 32, and both ends are fixed to the hollow body 31 by the mounting members 8. The other configuration is the same as that of the first embodiment. With this configuration, the same effect as that of the first embodiment can be obtained.

The third embodiment of the present invention shown in FIG. 4 is applied to an externally illuminated overheating preventing light irradiation device B which allows a fluid to pass through the inside of a light source. This overheating prevention light irradiation device B has a casing 40 maintained in an airtight state,
A hollow body 41 is inserted into the casing 40.
The inflow port 42 and the outflow port 43 at both ends of the hollow body 41
Are connected to L-shaped connection pipes 44 and 45, respectively, and the fluid P is introduced into the cavity 41 through the connection pipes 44 and 45 or is led out of the cavity 41.

In the casing 40, a hollow body 41 is provided.
A plurality of ultraviolet lamps 2 are provided at a position separated by a desired distance from the hollow body 4.
1 is configured to irradiate the fluid P flowing inside 1 with ultraviolet rays. The casing 40 is provided with a supply port 46 and an exhaust port 47, whereby the inside of the casing 40 is filled with nitrogen, an inert gas, or the like supplied from the supply port 46, or an exhaust port is provided. Gas from 47 (air)
Is evacuated and evacuated. Therefore, also in the present embodiment, the space V is kept under an atmosphere such as an inert gas or a vacuum. The other configuration is the same as that of the first embodiment. With this configuration, the same effect as that of the first embodiment can be obtained.

Further, a third embodiment of the present invention shown in FIG.
A part of the configuration of the internally illuminated overheating prevention light irradiation device A shown in FIG. 3 is modified so that a drain pipe 13 is provided so as to be continuous with the outlet 5. A long pipe 50 is connected to the outlet 5, and a number of branch pipes 51 are attached to the pipe 50 at appropriate intervals. On-off valves 52 are attached to the ends of these branch pipes 51, respectively, so that water P can be freely taken out from each on-off valve 52. The drain pipe 13 including the relief valve 14, the check valve 15, and the drain pipe 16 is connected to an end of the pipe 50. And drain pipe 1
A drainage receiving portion 53 such as a tank or a sink for receiving drainage is provided at the end of 6.

The other structure and operation are the same as those of the above-described embodiment, and the same effect can be obtained by adopting such a structure. Since the drain pipe 13 is provided at the tip of the pipe 50, for example, when the flow of the water P is stopped and the pool water is generated in the pipe 50, the pool water is removed by the next water P to flow. 13 can be drained. Therefore, the accumulated water can be prevented from being discharged from each of the on-off valves 52, and the sterilized water P can be always discharged from the on-off valves 52.

Note that the water supply device 3 used in the above embodiment was used.
In place of the above, a pressurizing pump that constantly discharges water at a constant pressure is provided. A function to output a control signal for performing the operation may be provided, and the relief valve 14 may be directly opened and closed by a signal from the thermometer 11.

FIG. 6 shows a specific example of the use of the third embodiment of the present invention. In FIG. 6, the present invention is applied as a part of a water supply facility such as a condominium or factory. An elevated tank 61 is installed on the roof of a building 60, and an underground tank 62 is installed on the underground. The elevated tank 61 and the underground tank 62 are provided with a pumping pipe 63 for pumping water stored in the underground tank 62 to the elevated tank 61, and distribute the water stored in the elevated tank 61 to each water supply station and to remove remaining water. Supply return pipe 64 for returning to underground tank 62
And are connected in a circulable manner.

The underground tank 62 is provided with a water pump 65. By the operation of the water pump 65, the underground tank 6 is operated.
The water P in 2 is supplied to the elevated tank 61 via the pumping pipe 63. The above-mentioned overheat prevention light irradiation device A or B is connected to the outlet of the elevated tank 61, and one end of the supply return pipe 64 is connected to the outlet 5 of the overheat prevention light irradiation device A or B. ing. A plurality of distribution pipes 66 for distribution to each floor are provided in the middle of the supply return pipe 64.
Is connected. An appropriate number of branch pipes 67 extending to a desired water supply station are connected to each distribution pipe 66, and an opening / closing valve is attached to a tip of each branch pipe 67.

The drain pipe 13 is connected to the end of the supply return pipe 64, and the remaining water is returned to the underground tank 62 from the tip of the drain pipe 16. Reference numeral 68 denotes a drain valve provided at the end of the supply return pipe 64.
The remaining water may be drained to the outside.

According to the water supply facility having such a configuration, the water discharged from the elevated tank 61 is introduced into the overheating preventing light irradiation devices A and B and sterilized as described above, and the sanitary condition after the sterilization is improved. Since the water P is supplied from the supply return pipe 64 to all the water stations via the distribution pipe 66 and the branch pipe 67, sanitary sterilized water can be used at all the water stations.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, water P is used as a specific example of the fluid, and the water P The example in which the water P is sterilized by irradiating the water P has been described. As another example of the fluid, for example,
Various liquids such as sugar liquid, starch emulsion, white water or their drainage used in the field of food processing or the like, or cutting oil and cleaning oil related to factories can be used, as well as air, nitrogen. And various kinds of fluids such as an inert gas or a mixture of these liquids and gases. In this case, the fluid supply source is, for example, a sugar solution supply device, a white water supply device, an air supply device, a nitrogen supply device, or the like according to the type of the fluid. The overheating prevention light irradiation device according to the present invention is effective when used in a water supply system in a building, an apartment, a factory, or the like, or an experimental system in a hospital, a research laboratory, or the like.

Further, the overheating preventing light irradiation apparatus of the present invention can be applied not only to sterilization of the above-mentioned fluids, but also to decomposition of these fluids or synthesis by chemical reaction. In the above embodiment, an example was described in which the ultraviolet light 2 was used as the light source and the light to irradiate the fluid was ultraviolet light. In this case, a thermal effect of infrared rays that is absorbed by the object and mainly exerts a thermal effect can be expected. A large lamp or a small lamp may be used as long as it emits ultraviolet light, infrared light, or far infrared light without being limited to the shape of the lamp. As the light source, not only a lamp but also a laser device for irradiating a laser can be used.

Further, in the above-described embodiment, the thermometer 11 is applied as the temperature detecting means. Alternatively, for example, a thermocouple can be used. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0064]

As described above, according to the present invention,
Since the temperature detection means on the outlet side, the drain pipe having the relief valve, and the temperature control means for controlling the temperature in the cavity are provided, the temperature of the fluid in the cavity can be constantly maintained at a predetermined temperature or less. In addition, the temperature of the light source is maintained at a predetermined temperature or less to prevent the output from lowering, whereby a predetermined sterilizing effect can be always obtained, and the life of the light source can be improved.

The overheating preventing light irradiation device having a suitable structure having such an effect can be obtained by arranging a light source inside the hollow body and irradiating light from inside.

Further, by arranging a light source outside the hollow body and irradiating light from the outside, it is possible to obtain an overheating preventing light irradiation apparatus having a suitable structure.

Furthermore, the temperature of the fluid at the outlet can be accurately detected by arranging the temperature detector at the outlet or in the vicinity thereof using the temperature detector as a thermometer. When a thermometer is disposed outside the outlet, the temperature of the fluid can be detected without bringing the thermometer into contact with the fluid.

By providing a display unit in the thermometer, the detected temperature can be displayed in a digital or analog value so as to be easily understood.

Further, by fixing the tip of the drain pipe to the hollow body or its fixing member, the drain pipe does not vibrate due to pressure fluctuation of the fluid at the time of discharge, etc. Can be safely discharged to the outside.

By providing a check valve in the drain line, it is possible to prevent external air from flowing toward the hollow body when the relief valve is opened.

Further, by connecting the drain pipe to the outlet, the pipe at the outlet can be used also as the drain pipe, so that the piping system can be simplified, and the accumulated fluid in the pipe can be obtained. Can be discharged to the outside.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a specific configuration of FIG.

FIG. 3 is an explanatory view showing a second embodiment of the present invention.

FIG. 4 is an explanatory view showing a third embodiment of the present invention.

FIG. 5 is an explanatory view showing a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a specific usage example of the fourth embodiment shown in FIG. 5;

[Explanation of symbols]

 1, 31, 41 Cavity 2 Ultraviolet lamp (light source) 3 Water supply device (fluid supply source) 4, 42 Inlet 5, 43 Outlet 6 Drain port 7, 32 Opening 8 Mounting member 9, 30 Tube 11 Temperature Meter (temperature detecting means) 11a Temperature detecting section 13 Drain pipe 14 Relief valve 15 Check valve 16 Drain pipe 17 Bracket 18 Mounting base (fixing member) 20 Changeover switch 21 Water supply section 22 Temperature control section (Temperature control section) 40 Casing (fixing member) 44, 45 Connection pipe 50 Pipe 52 On-off valve 61 Elevated tank 62 Underground tank 63 Pumping pipe 64 Supply return pipe 66 minute pipe A, B Overheat prevention light irradiation device P Water (fluid)

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masafumi Koji 4-3-115 Shinjuku, Shinjuku-ku, Shinjuku-ku, Tokyo Ray-flat Shinjuku 601 Toyoshinka Academic Industrial Center Co., Ltd. (56) References JP-A-59-186684 ( JP, A) Actual opening Sho 51-55050 (JP, U)

Claims (8)

(57) [Claims] 1. A hollow body having an inlet and an outlet for a fluid, and a fluid disposed inside or outside the hollow body and irradiating light to the fluid flowing through the hollow body to sterilize, decompose, and synthesize the fluid. And a fluid supply source that pressurizes the fluid, introduces the fluid into the cavity from the inlet, and discharges the fluid in the cavity from the outlet with the pressure of the fluid. In the overheating prevention light irradiation device, a temperature detecting means for detecting a temperature of the fluid on the outlet side, a drain pipe connected to the outlet and having an openable / closable relief valve, and a detection result of the temperature detecting means Based on the above, when the fluid is overheated to a predetermined temperature or more, the relief valve is opened to introduce the fluid supplied from the fluid supply source into the cavity, and the pressure of the fluid causes the superheated fluid to flow from the drain line. Exhaust to the outside And a temperature control means for emitting light. 2. The overheating preventing light irradiation device according to claim 1, wherein the light source is disposed inside the hollow body, and the light is irradiated from inside the fluid. 3. The overheating prevention light irradiation device according to claim 1, wherein the light source is arranged outside the hollow body, and the light is irradiated from outside the fluid. 4. The overheating prevention light irradiation device according to claim 1, wherein the temperature detection means is a thermometer having a temperature detection unit disposed at or near the outlet. Overheating prevention light irradiation device. 5. The overheating prevention light irradiation device according to claim 1, wherein the thermometer has a display unit for displaying the detected temperature as a digital value or an analog value. Overheating prevention light irradiation device. 6. The overheating preventing light irradiation device according to claim 1, wherein the drain pipe has a tip fixed to the hollow body or a fixing member to which the hollow body is attached. Overheating prevention light irradiation device. 7. The overheating preventing light irradiation device according to claim 1, wherein the drain pipe prevents external air from flowing toward the hollow body when the relief valve is opened. An overheating prevention light irradiating device provided with a check valve. 8. The overheat preventing light irradiating apparatus according to claim 1, wherein the drain pipe is provided continuously at an end of the outlet. Irradiation device.