JP2016086790A - Mosquito catcher using titanium oxide photocatalyst - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mosquito catcher that improves an efficiency of carbon dioxide generation by a photocatalyst by using an anatase-type titanium oxide photocatalyst, thereby improving a mosquito catching efficiency.SOLUTION: A mosquito catcher 1 using the titanium oxide photocatalyst according to the present invention is provided with: an organic gas supply part 10 that generates an organic gas; an ultraviolet light irradiation part 20 that irradiates an ultraviolet light; a photocatalyst part 30 having an anatase-type titanium oxide photocatalyst sheet 31 that receives the ultraviolet light and generates a carbon dioxide by decomposing the organic gas; a storage container 40 that has a window 41 and stores the organic gas supply part 10, the ultraviolet light irradiation part 20, and the photocatalyst part 30; a mosquito selection net 50 that covers the window 41 and has a mesh of a size slightly larger than a size which a mosquito can pass through; and a catching part 60 that catches the mosquito that passes through the mesh and enters into the storage container 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mosquito trap. Specifically, it relates to a mosquito trap using a titanium oxide photocatalyst.

  A conventional mosquito trap using titanium oxide and ultraviolet rays is disclosed in Patent Document 1, for example. Dirt and the like adhering to the titanium oxide layer are decomposed into carbon dioxide gas by active oxygen or ozone gas, but decomposition is promoted by heating with infrared rays. In addition, suction-type mosquito traps are collected on the market and collected by ultraviolet rays. Mosquito traps using carbon dioxide cylinders are also commercially available. However, there was a problem that the desired effect could not be obtained. Further, the method using a carbon dioxide gas cylinder has a problem that it takes time to change the gas cylinder, and the gas cylinder is heavy and difficult to move.

  Incidentally, the inventors have developed an anatase-type titanium oxide photocatalyst sheet having remarkable organic gas decomposition efficiency (see Patent Document 2). Moreover, the organic gas decomposition efficiency was further improved by using an anatase-type titanium oxide photocatalyst sheet with a non-periodic sponge structure in which a large number of fine channels were formed. Accordingly, the anatase-type titanium oxide photocatalyst sheet developed by the inventors was applied to a mosquito trap to increase the decomposition efficiency of organic gas, that is, the generation efficiency of carbon dioxide gas, thereby improving the collection efficiency of mosquitoes.

JP 2009-95257 A Japanese Patent No. 5474612

  An object of the present invention is to provide a mosquito trap that uses anatase-type titanium oxide photocatalyst to increase the generation efficiency of carbon dioxide by the photocatalyst and increase the collection efficiency of mosquitoes.

  The mosquito trap 1 using the titanium oxide photocatalyst according to the first aspect of the present invention includes, for example, an organic gas supply unit 10 that generates an organic gas, an ultraviolet irradiation unit 20 that irradiates ultraviolet rays, as illustrated in FIG. The photocatalyst unit 30 having the anatase-type titanium oxide photocatalyst sheet 31 that receives ultraviolet rays and decomposes organic gas to generate carbon dioxide, the organic gas supply unit 10, the ultraviolet irradiation unit 20, and the photocatalyst unit 30 are housed in a window. A storage container 40 having 41, a mosquito sorting net 50 covering the window 41 and having a mesh size slightly larger than the size through which the mosquito can pass, and a collection unit 60 for collecting mosquitoes that have entered the storage container 40 through the mesh. With.

Here, the organic gas means a gas generated from an organic solvent such as alcohol, acetone or toluene. Decomposes into carbon dioxide and water vapor. In the present application, a low molecular alcohol gas that is easily volatilized and easily decomposed into carbon dioxide gas is preferable. In addition, although lactic acid has a low vapor pressure, it is volatilized although it is in a small amount. Therefore, the organic gas includes lactic acid gas. The anatase-type titanium oxide photocatalyst sheet typically refers to a sheet of titanium foil carrying anatase-type titanium oxide photocatalyst, but any sheet-like sheet carrying anatase-type titanium oxide photocatalyst may be used. . Also, the size slightly larger than the size through which mosquitoes can pass is, for example, 10 mm to 15 mm, because most mosquitoes are 15 mm or less in a slender system and can pass through their wings.
If comprised like this aspect, since the anatase type titanium oxide photocatalyst which has very high efficiency which decomposes | disassembles organic gas and generate | occur | produces carbon dioxide is used, a mosquito trap with high mosquito collection efficiency can be provided.

  In the mosquito trap 1 using the titanium oxide photocatalyst according to the second aspect of the present invention, in the first aspect, for example, as shown in FIG. 2, the anatase-type titanium oxide photocatalyst sheet 31 contains the anatase-type titanium oxide particles 36. On the surface of the titanium foil 33 having a non-periodic sponge structure in which a large number of microchannels penetrating the front and back surfaces are formed by carrying the etching process with a non-periodic pattern from one side or both sides of the supported photocatalyst sheet 31. This is a photocatalytic sheet 31 in which a titanium oxide base 35 is formed by an anodized film 39, and anatase-type titanium oxide particles 36 are baked on the titanium oxide base 35.

Here, the non-periodic sponge structure in which a large number of fine flow paths are formed is not necessarily limited to the same structure as the sponge, and a large number of flow paths are formed, and irregular irregularities that are stretched in a mesh shape. Any structure can be used. The irregularity without periodicity may be in a micro range, and may be periodic in a macro range.
If comprised like this aspect, the photocatalyst sheet 31 has a large number of fine channels 34 penetrating the front and back, and the surface area of the photocatalyst layer 37 increases. Thereby, the decomposition efficiency by a catalyst improves markedly, and the collection efficiency of a mosquito is also improved markedly. In addition, the titanium oxide base 35 and the photocatalyst layer 37 formed of the anodized film have extremely strong bonding properties, and the photocatalyst layer 37 is not easily peeled off, so that the mosquito trap can have a long life.

  In the mosquito trap 1 using the titanium oxide photocatalyst according to the third aspect of the present invention, the organic gas supply unit 10 is impregnated with alcohol in the first aspect or the second aspect, for example, as shown in FIG. First fibrous sheet 11A, second fibrous sheet 11B impregnated with lactic acid, alcohol bottle 12 containing alcohol and lactic acid bottle 13 containing lactic acid, and first fiber sheet 11A from alcohol bottle 12 The first organic liquid transmitter 14A for guiding alcohol to the second and the second organic liquid transmitter 14B for guiding lactic acid from the lactic acid candy 12 to the second fibrous sheet 11B.

Here, the organic liquid impregnated in the first fibrous sheet 11A and the second fibrous sheet 11B may include alcohol and lactic acid, respectively, and may be alcohol and milk.
If comprised like this aspect, since the gas supplied in this aspect contains a carbon dioxide gas and lactic acid, many mosquitoes are collected.

In the mosquito trap 1 using the titanium oxide photocatalyst according to the fourth aspect of the present invention, in any one of the first to third aspects, for example, as shown in FIG. 1 or FIG. It has an adhesive sheet 61 for adhering mosquitoes or an aspirator 62 for sucking mosquitoes.
If comprised in this way, a mosquito can be collected efficiently.

In the mosquito trap 1 using the titanium oxide photocatalyst according to the fifth aspect of the present invention, in any one of the first to fourth aspects, the wavelength of the ultraviolet ray is 388 nm or less.
If comprised in this way, organic gas, such as alcohol, will be decomposed | disassembled into the active species generated from a titanium oxide photocatalyst, and a carbon dioxide gas will be generated.

  ADVANTAGE OF THE INVENTION According to this invention, the generation | occurrence | production efficiency of the carbon dioxide gas by a photocatalyst is high, and the mosquito trap using the anatase type titanium oxide photocatalyst with the high collection efficiency of a mosquito can be provided.

It is a figure which shows the structural example of the mosquito trap which used the titanium oxide photocatalyst in a present Example. It is a figure which shows the structural example of a titanium oxide photocatalyst sheet. It is a figure which shows the structural example of the titanium oxide photocatalyst sheet in Example 2. FIG. FIG. 4 is a diagram showing a configuration example of a titanium oxide photocatalyst sheet in Example 3. It is a figure which shows the structural example of the mosquito trap which used the titanium oxide photocatalyst in Example 4. FIG. It is a figure which shows the structural example of the mosquito trap which used the titanium oxide photocatalyst in Example 5. FIG. It is a figure which shows the structural example of the mosquito trap which used the titanium oxide photocatalyst in Example 8. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

〔Constitution〕
The structural example of the mosquito trap 1 using the titanium oxide photocatalyst in a present Example is shown in FIG. 1A is a cross-sectional view of a mosquito trap, FIG. 1B is an exploded perspective view, and FIG. 1C is an external perspective view. The mosquito trap 1 includes an organic gas supply unit 10, an ultraviolet irradiation unit 20, a photocatalyst unit 30, a storage container 40, a mosquito sorting net 50, a collection unit 60, an electric supply unit 70, and a control unit 72.

The organic gas supply unit 10 generates organic gas. The organic gas supply unit 10 includes a fibrous sheet 11 (first and second fibrous sheets 11A and 11B), an alcohol bottle 12, a lactic acid bottle 13, and an organic liquid transmitter 14 (first and second organic liquid transmitter 14A). , 14B). For example, alcohol as an organic liquid containing alcohol is stored in the alcohol bottle 12. A sheet table 65 is installed on the alcohol basket 12, and a first cloth sheet as the first fibrous sheet 11 </ b> A is laid on the sheet table 65. One end of the first cloth sheet 11 </ b> A is hung down as the first organic liquid transmitter 14 </ b> A and is immersed in sake in the alcohol bottle 12. Then, alcohol is sucked up from the alcohol bottle 12 into the first cloth sheet 11A by capillary action. As a result, the first fabric sheet 11A is impregnated with sake. Then, the alcohol volatilizes from the first cloth sheet 11A (the vapor pressure of ethanol at 20 ° C. is 0.058 atm). Further, milk as an organic liquid containing lactic acid is stored in the lactic acid candy 13. A sheet placing table 65 is installed on the lactate basket 13, and a second cloth sheet as the second fibrous sheet 11 </ b> B is laid on the sheet placing table 65. One end of the second fabric sheet 11B is hung down as the second organic liquid transmission tool 14B and immersed in the milk in the lactic acid candy 13. Then, milk is sucked up from the lactic acid candy 13 into the second cloth sheet 11B by capillary action. Thereby, the second cloth sheet 11B is impregnated with milk. Then, lactic acid is volatilized from the second fabric sheet 11B (the vapor pressure of lactic acid at 20 ° C. is 3.9 × 10 ⁻⁶ atm).

  The ultraviolet irradiation unit 20 irradiates ultraviolet rays. For example, an ultraviolet lamp such as an ultraviolet LED is used as the ultraviolet irradiation unit 20. In this embodiment, an ultraviolet LED is used, installed above the organic gas supply unit 10, and irradiated in the direction of the organic gas supply unit 10. Ultraviolet light having a wavelength of 388 nm or less corresponding to a band gap of 3.2 eV of anatase type titanium oxide can be used. For example, 4 × 4 = 16 ultraviolet LEDs having a diameter of 5 mm and a peak wavelength of 375 nm are arranged on the lower surface of a 10 cm × 10 cm board. The lead wires are wired and drawn on the upper side of the board, and are collectively led to the electricity supply unit 70 via the operation panel 72.

  The photocatalyst unit 30 includes an anatase-type titanium oxide photocatalyst sheet 31 that receives ultraviolet rays and decomposes an organic gas (alcohol gas or the like) to generate carbon dioxide gas. The photocatalytic sheet 31 is laid between the organic gas supply unit 10 and the ultraviolet irradiation unit 20. That is, it is laid on the fibrous sheet 11 via the spacer 32. The ultraviolet irradiation unit 20 and the anatase-type titanium oxide photocatalyst sheet 31 are sheets that carry the anatase-type titanium oxide photocatalyst. When anatase-type titanium oxide receives ultraviolet light having a wavelength of 388 nm or less, holes that easily generate hydroxyl radicals (OH radicals) having a strong oxidizing power and electrons that easily generate a superoxide anion having a strong reducing power are generated. Since anatase-type titanium oxide is an indirect transition semiconductor, holes and electrons do not immediately recombine, and the lifetime of electrons is 10 times or more (10 ns) compared to direct-transition rutile titanium oxide. Active species such as hydroxyl radicals, superoxide anions, holes and electrons decompose alcohol volatilized from the first fibrous sheet 11A into carbon dioxide and water vapor. In anatase-type titanium oxide, holes and electrons have a long life, so that active species continue to be generated and alcohol decomposition is promoted. The decomposition rate constant is 1.80 to 1.86, indicating outstanding processing ability, and the decomposition efficiency is remarkably high. The spacer 32 is made of, for example, a plastic, four-shaped frame, and is placed on the fiber sheet 11 (first and second fiber sheets 11A and 11B), so that the anatase-type titanium oxide photocatalyst sheet 31 is formed. Support mounting. The photocatalyst sheet 31 may be supported so as not to directly contact the fibrous sheet 11, and the height can be freely set to some extent such as 10 to 30 mm.

  FIG. 2 shows a configuration example of the titanium oxide photocatalyst sheet. The anatase type titanium oxide photocatalyst sheet 31 is a photocatalyst sheet carrying anatase type titanium oxide particles 36. The titanium foil 33 is used as a substrate, and an etching process using an aperiodic pattern is performed from one side or both sides thereof, so that a large number of fine channels 34 penetrating the front and back are formed. Thereby, the titanium foil 33 has a non-periodic sponge structure. By subjecting the surface of the titanium foil 33 having such a non-periodic sponge structure to anodic oxidation, a titanium oxide base 35 made of an anodic oxide coating is formed. The anodized film is formed not only on the front and back surfaces of the titanium foil 33 but also on the inner wall surface of the fine channel 34. Anatase-type titanium oxide particles 36 are baked on the titanium oxide base 35 to form a photocatalyst layer 37. Many cracks 38 appear in the titanium foil 33 by the anodizing process and the baking process. The film thickness of the titanium oxide base 35 is, for example, 70 to 150 nm, and the titanium oxide base 35 and the photocatalyst layer 37 are formed so as to cover the cracks 38. The titanium oxide base 35 and the photocatalyst layer 37 formed of the anodic oxide coating have extremely strong bonding properties because the titanium oxides are bonded to each other, and the photocatalyst layer 37 is difficult to peel off. Furthermore, since the surface of the fine flow path 34 has a complicated uneven shape and has fine cracks on the order of microns, the surface area of the photocatalyst layer 37 is increased, and the decomposition efficiency by the catalyst is remarkably improved. Further, when ultraviolet rays are irradiated, irregular reflection and light scattering occur at the surface of the photocatalyst layer 37 and the interface with the titanium oxide base 35, so that the ultraviolet rays can be used efficiently.

  Returning to FIG. The storage container 40 stores the organic gas supply unit 10, the ultraviolet irradiation unit 20, and the photocatalyst unit 30. Moreover, it has the window 41 for a mosquito to get inside by being attracted by the carbon dioxide gas and lactic acid in the storage container 40. The window 41 is provided at approximately the height between the organic gas supply unit 10 and the ultraviolet irradiation unit 20 in almost all directions of the side surface of the storage container 40. The storage container 40 is provided with a door 42 for taking in and out the alcohol bottle 12 and the lactic acid bottle 13. The mosquito sorting net 50 is installed so as to cover the window 41 of the storage container 40. The mosquito sorting net 50 has a mesh size slightly larger than the size through which mosquitoes can pass. Since most mosquitoes are 15 mm or less in a slender system, and it is possible to pass through their wings, the dimension slightly larger than the dimension through which the mosquito can pass is, for example, 10 mm to 15 mm. This greatly reduces the ability of large insects such as moths to prevent mosquitoes from entering. The collection unit 60 collects mosquitoes that have entered the storage container 40. The collection part 60 has the adhesive sheet 61 or a suction device. In this embodiment, an adhesive sheet 61 is used. Inside the mosquito sorting net 50, a large number of strip-shaped adhesive sheets 61 are attached in the vertical direction along the mosquito sorting net 50. The mosquitoes that have passed through the mosquito sorting net 50 and entered the storage container 40 and touched the adhesive layer applied to one or both sides of the adhesive sheet 61 are collected by adhering to the adhesive layer. By making the mosquito sorting net 50 detachable from the window 41 of the storage container 40 and removing it from the window 41, the adhesive sheet 61 that has collected mosquitoes is collected, and a new adhesive sheet 61 is attached. The adhesive sheet 61 is detachably attached to the inside of the storage container 40 by using stoppers 64 such as hooks, clips, and magnets.

  The electricity supply unit 70 supplies electricity to the ultraviolet LED 21 and the control unit 90. The electric supply unit 70 is installed in the remaining space of the alcohol bottle 12 and the lactic acid bottle 13, for example, in the space under the sheet placing table 65 in the storage container 40. In this embodiment, the electricity supply unit 70 is connected to a commercial power source, and AC 100 V is converted into, for example, about 4 V, about 6 V, about 8 V, etc. necessary for the ultraviolet LED 21. The control unit 72 includes an operation panel in this embodiment. The operation panel 72 is provided outside the storage container 40. The operation panel 72 is provided with a switch of the electricity supply unit 70 (also used to turn on / off the ultraviolet LED) and a light amount adjustment dial of the ultraviolet LED 21 so that the ultraviolet LED 21 can be turned on / off and the amount of light can be adjusted. The operation panel 72 is attached with a meter indicating the remaining amount of the alcohol bottle 12 and the lactic acid bottle 13. When the amount of alcohol and / or milk is low, the door 42 is opened to replenish.

[Action]
Next, the operation of the mosquito trap 1 will be described. The first fabric sheet 11A sucks alcohol from the alcohol bottle 12 and volatilizes the alcohol. The second fabric sheet 11B sucks milk from the lactic acid cake 13 and volatilizes the lactic acid. When the anatase-type titanium oxide photocatalyst sheet 31 is irradiated with ultraviolet rays having a wavelength of 388 nm or less from the ultraviolet LED, active species such as hydroxyl radicals (OH radicals), superoxide anions, holes and electrons are generated. These active species decompose the alcohol volatilized from the first fibrous sheet 11A into carbon dioxide gas and water. Mosquitoes invade through the mosquito sorting net 50 provided in the window 41 of the storage container 40 by being attracted by carbon dioxide and lactic acid. When mosquitoes that have entered the storage container 40 touch the adhesive sheet 61, they are collected by the adhesive sheet 61.

  Since the decomposition efficiency of anatase-type titanium oxide is very large, the collection efficiency of mosquitoes has been significantly improved. Further, since a large number of fine channels 34 penetrating the front and back are formed, the surface area of the photocatalyst layer 37 is increased. Further, when ultraviolet rays are irradiated, irregular reflection and light scattering occur at the surface of the photocatalyst layer 37 and the interface with the titanium oxide base 35, so that the ultraviolet rays can be used efficiently. By these, the decomposition efficiency of organic gas improves remarkably, and the collection efficiency of mosquito is also improved remarkably. Further, the titanium oxide base 35 and the photocatalyst layer 37 formed of the anodic oxide coating have extremely strong bonding properties because the titanium oxides are bonded to each other, and the photocatalyst layer 37 is hardly peeled off. For this reason, the mosquito trap 1 has a long life.

  In Example 1, although the titanium oxide photocatalyst sheet 31 demonstrated the example which is flat form, in Example 2, the titanium oxide photocatalyst sheet 31A is about the example in which the undulations which continue along one direction were formed in the corrugated plate shape. explain.

  FIG. 3 shows a configuration example of the titanium oxide photocatalyst sheet 31A in the second embodiment. It is formed by pressing into a corrugated plate before or after anodizing. By adopting the corrugated plate shape, the surface area of the photocatalyst layer 37 is further increased as compared with the flat plate shape, so that the photocatalytic effect can be enhanced. Other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment are obtained.

  In Example 1, although the titanium oxide photocatalyst sheet 31 demonstrated the example which has a non-periodic sponge structure, in Example 3, it replaced with a non-periodic sponge structure and the titanium oxide photocatalyst sheet 31B bends a cutting site | part. A description will now be given of an example having a large number of flow ports 45 opened and a large number of collision pieces 46 each having a cut portion bent at a position where the gas collides with a fluid to be processed flowing through the flow port 45.

The structural example of the titanium oxide photocatalyst sheet 31B in Example 2 is shown in FIG. 4A is a front view, FIG. 4B is a longitudinal sectional view thereof, FIG. 4C is an enlarged perspective view, and FIG. 4D is an AA sectional view. Before the anodizing treatment, a cut portion is created and the titanium foil 33B is bent. The titanium oxide photocatalyst sheet 31 </ b> B includes a large number of flow ports 45 that are opened by bending a cut portion, and a cut portion that is bent at a position where an organic gas collides with a fluid to be processed that flows through the flow port 45. A number of collision pieces 46 are provided. As a result, the organic gas that permeates from one side of the photocatalyst sheet 31B to the opposite side collides with the collision piece 46 when passing through the collision flow paths 47A and 47B, and is transmitted to the opposite side of the photocatalyst sheet 31B while changing the direction. It will be. That is, the organic gas flowing from the flow port 45 side to the collision piece 46 side collides with the collision piece 46 and is diffused to the opposite surface side of the photocatalyst sheet 31B. The organic gas flowing from the collision piece 46 side to the circulation port 45 side collides with the collision piece 46 and flows around the collision piece 46 and is transmitted from the circulation port 45 to the opposite surface side of the photocatalyst sheet 31B. As a result, the organic gas flows along the photocatalyst sheet 31 </ b> B to increase the time for touching the photocatalyst layer 37, thereby increasing the decomposition effect of the organic gas by the photocatalyst. Further, the surface of the photocatalyst sheet 31B is an uneven surface 44 roughened by sandblasting or the like, an anodized film 39 is formed on the surface layer, and anatase-type titanium oxide particles 36 are attached and fired on the surface. A photocatalyst layer 37 is formed.
The configuration other than the titanium oxide photocatalyst sheet 31B is the same as that of the first embodiment, and the same effects as those of the first embodiment are obtained.

FIG. 5 schematically shows a configuration example of a mosquito trap 1A using the titanium oxide photocatalyst according to the fourth embodiment. In the above embodiment, the example in which the collection unit has the adhesive sheet 61 has been described. In Example 4, an example in which the collection unit has the aspirator 62 will be described. The aspirator 62 is installed in one direction near the window 41 of the storage container 40, for example, and a part of the mosquito sorting net 50 located behind the aspirator 62 is removed and a prosthetic net 63 is attached. The fan of the aspirator 62 is rotated to suck mosquitoes inside the storage container 40 and release them into the insect repelling net 63. The bag mouth of the hochu net 63 is tied with a string to collect mosquitoes.
Configurations other than the collection unit 60 and the mosquito sorting net 50 are the same as those in the first embodiment, and the same effects as those in the first embodiment are obtained.

FIG. 6 schematically shows a configuration example of a mosquito trap 1B using the titanium oxide photocatalyst in Example 5. In the above embodiment, an example in which a commercial power source is used as the power source has been described. In the fifth embodiment, an example in which the windmill 71 is used as a power source for the mosquito trap 1B will be described. This is convenient when used in places where it is difficult to connect to a commercial power source such as outdoors.
Currently, ultra-compact wind power generators with a propeller diameter of 20 cm, an output of 14.5 V, and a maximum output of 2.8 W are commercially available. For example, since the forward voltage per ultraviolet LED is 4 V and the optical output is 15 mW, such a micro wind power generator can also be used as a power source. The wind turbine 71 of such a micro power generator is installed in a place with good wind conditions. It is preferable to install the windmill 71 in a place away from the mosquito trap 1B so as not to affect the air flow around the mosquito trap 1B. Moreover, it is preferable to connect and use a capacitor | condenser to the windmill 71 so that electric power can always be supplied. A solar battery may be used instead of the windmill. A small module of about 60 cm × 40 cm and a maximum power of 30 W and 17.0 V is commercially available and can be used as a power source. These power supplies are connected to the electric supply unit 70 and converted into a voltage suitable for the ultraviolet LED 21 by the electric supply unit 70 for use. In addition, it is preferable to use a solar cell connected to a solar cell so that electric power can be constantly supplied. Further, a battery may be used instead of the windmill or the solar battery. The batteries are connected in series and supplied at a voltage suitable for the ultraviolet LED 21. Power can be supplied stably at all times regardless of the weather and wind, which is convenient when it is carried around and used in places where it is difficult to connect to a commercial power source.
The configuration other than the power source and the electric supply unit is the same as that of the first embodiment, and the same effect as that of the first embodiment is obtained.

In the above embodiment, an example in which alcohol and lactic acid are used as mosquito attracting materials has been described. In Example 6, an example in which a mosquito attracting material is added to this component will be described. Mosquitoes prefer carbon dioxide. Furthermore, when lactic acid is mixed with carbon dioxide, it attracts mosquitoes well. Lactic acid attracts L-lactic acid better than D-lactic acid. Furthermore, there are reports that sulfur-containing amino acids, methionine, cystine, and cysteine show high attractiveness. It is also attracted by the smell of habitat. They are also attracted to honey and mates. Therefore, mosquitoes can be attracted further by volatilizing these attracting materials, for example, inhaled water in the storage container.
Other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment are obtained.

In the above embodiment, an example in which an ultraviolet LED is used as the ultraviolet irradiation unit 20 has been described. In this embodiment, an example in which a straight tube type ultraviolet lamp is used will be described.
A 58 cm long, 20 W type straight tube type ultraviolet LED lamp is commercially available. When such a straight tube type is used, the ultraviolet irradiation unit 20 installs a straight tube type lamp above the photocatalyst sheet 31 with the longitudinal direction horizontal. You may install two in parallel. Moreover, you may attach directly or indirectly to the storage container 40, without using a board. A straight tube type ultraviolet fluorescent lamp may be used instead of the straight tube type LED lamp.
The configuration other than the ultraviolet irradiation unit 20 is the same as that of the first embodiment, and the same effect as that of the first embodiment is obtained.

  In the above embodiment, the example in which the ultraviolet irradiation unit 20 is installed above the photocatalyst sheet 31 has been described. However, in Example 8, the mosquito trap is a cylindrical type, and a straight tube type ultraviolet ray is placed on the central axis (on the vertical line) of the cylinder. An example of installing a lamp will be described.

FIG. 7 shows a configuration example of a mosquito trap 1C using the titanium oxide photocatalyst in Example 8. A straight tube type ultraviolet lamp 22 of the ultraviolet irradiation unit 20 is arranged on the central axis of the cylinder. The anatase-type titanium oxide photocatalyst sheet 31 of the photocatalyst portion 30 is concentrically arranged in the circumferential direction around the straight tube type ultraviolet lamp 22. Around the photocatalyst sheet 31, the fiber sheet 11 of the organic gas supply unit 10 is concentrically arranged. The lower (one end) portion of the first fibrous sheet 11A is hung down as the first organic liquid transmitter 14A and immersed in the sake in the alcohol bottle 12. The lower (one end) portion of the second fibrous sheet 11B is hung down as the second organic liquid transmission tool 14B and immersed in the milk in the lactate bowl 13. The storage container 40 is disposed around the fibrous sheet 11 and the side surfaces thereof are concentrically arranged. Windows 41 are provided in almost all directions on the side of the storage container 40, and a mosquito sorting net 50 is installed so as to cover the window 41 of the storage container 40. The window 41 is provided below the lid of the storage container 40 at a height higher than the alcohol bottle 12 and the lactic acid bottle 13, for example. Inside the mosquito sorting net 50, a large number of strip-shaped adhesive sheets 61 are attached in the vertical direction along the mosquito sorting net 50.
If arranged in this way, a cylindrical mosquito trap 1C can be constructed. Although the arrangement of each part is different, the material of each part is the same as in Example 1, and the same effect as in Example 1 is achieved.

  For example, in the above embodiment, the example in which one end of the cloth sheet is used as the organic liquid transmission tool 14 to guide alcohol and lactic acid to the fibrous sheet 11 in the organic gas supply unit 10 has been described. An infusion needle may be used as 14. That is, even if alcohol drip bottles and lactic acid drip bottles are placed above the fiber sheet 11 as alcohol bottles and lactic acid bottles, alcohol and lactic acid are dropped onto the fiber sheet 11 through the drip needles from the alcohol drip bottles and lactic acid drip bottles. good. Moreover, although the example which uses a cloth sheet | seat as the fiber sheet 11 was demonstrated in the above Example, you may use a paper sheet | seat as a fiber sheet. Moreover, although the example which uses both alcohol and lactic acid as an organic liquid was demonstrated in the above Example, it may replace with lactic acid and may use ethyl lactate (vapor pressure at 20 degreeC is 0.00355 atmospheres), It is also possible to omit lactic acid. In addition, the dimensions and shape of the photocatalyst sheet 31 and the fibrous sheet 11 and the arrangement of components inside the mosquito trap can be appropriately changed.

  The present invention can be used for a mosquito trap.

1,1A-1E Mosquito trap 10 Organic gas supply unit 11 Fiber sheet 11A First fiber sheet (first cloth sheet)
11B Second fibrous sheet (second fabric sheet)
12 Alcohol bottle 13 Lactic acid bottle 14 Organic liquid transmitter 14A First organic liquid transmitter (one end of the first cloth sheet)
14B 2nd organic liquid transmission tool (one end of the 2nd cloth sheet)
20 UV irradiation part 21 UV LED
22 straight tube type ultraviolet lamp 30 photocatalyst part 31, 31A, 31B titanium oxide photocatalyst sheet 32 spacer 33, 33B titanium foil 34 fine channel 35 titanium oxide base 36 anatase type titanium oxide particle 37 photocatalyst layer 38 crack 38A uneven surface 39 anodic oxidation 39 Coating 40, 40A Storage container 41 Window 42 Door 45 Flow port 46 Collision piece 47A, 47B Collision flow path 50 Mosquito sorting net 60 Collection part 61 Adhesive sheet 62 Aspirator 63 Insect net 64 Stopper 65 Sheet placing table 70 Electric supply part 71 Windmill 72 control unit (control panel)

Claims (5)

An organic gas supply unit for generating organic gas;
An ultraviolet irradiation unit for irradiating ultraviolet rays;
A photocatalyst portion having an anatase-type titanium oxide photocatalyst sheet that receives the ultraviolet rays and decomposes the organic gas to generate carbon dioxide;
A storage container storing the organic gas supply unit, the ultraviolet irradiation unit, and the photocatalyst unit, and having a window;
A mosquito sorting net covering the window and having a mesh size slightly larger than the size through which mosquitoes can pass;
A collection unit for collecting mosquitoes that have entered the storage container through the mesh;
Mosquito trap with titanium oxide photocatalyst. The anatase-type titanium oxide photocatalyst sheet is a photocatalyst sheet supporting anatase-type titanium oxide particles, and a plurality of fine flow paths penetrating the front and back are formed by performing etching treatment with a non-periodic pattern from one side or both sides. A photocatalytic sheet in which a titanium oxide base with an anodized film is formed on the surface of a titanium foil having an aperiodic sponge structure, and anatase-type titanium oxide particles are baked on the titanium oxide base;
A mosquito trap using the titanium oxide photocatalyst according to claim 1. The organic gas supply unit includes a first fibrous sheet impregnated with alcohol, a second fibrous sheet impregnated with lactic acid, an alcohol bottle containing the alcohol, a lactic acid bottle containing the lactic acid, and the alcohol bottle. A first organic liquid transmission tool that guides the alcohol to the first fibrous sheet; and a second organic liquid transmission tool that guides the lactic acid from the lactic acid candy to the second fibrous sheet;
A mosquito trap using the titanium oxide photocatalyst according to claim 1 or 2. The collection part has an adhesive sheet for adhering the mosquito or an aspirator for sucking the mosquito;
A mosquito trap using the titanium oxide photocatalyst according to any one of claims 1 to 3. The wavelength of the ultraviolet light is 388 nm or less;
A mosquito trap using the titanium oxide photocatalyst according to any one of claims 1 to 4.

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