Chemical volatilization device

Abstract

The present invention provides a chemical volatilization device that can adequately impregnate the blown-in air with the chemical, thereby enabling effective volatilization of the chemical. [Solution] A drug volatilization device 1A comprises a drug volatilizer 3 that holds a volatile drug in a volatilizable manner, and a storage container 5 that houses the drug volatilizer 3 in a breathable manner, wherein the storage container 5 comprises a front portion 21 having a first opening 10 and a back portion 31 having a second opening 20, the front portion 21 and the back portion 31 are arranged opposite each other, and when the front portion 21 and the back portion 31 are superimposed, there is a region where the first opening 10 and the second opening 20 overlap, and a region where the first opening 10 and the second opening 20 do not overlap, and the area of ​​the overlapping region is configured to be 20 to 80% of the area of ​​the first opening 10 or the area of ​​the second opening 20.

Description

[Technical Field]

[0001] The present invention relates to a drug volatilization device comprising a drug volatilizer that holds a volatile drug in a volatilizable manner, and a container that houses the drug volatilizer in a breathable manner. [Background technology]

[0002] In houses, entrances and windows near balconies are entry points for pests. One way to suppress pest entry is to place insect repellent devices at entrances and balconies. As such insect repellent devices, for example, there are known insecticide volatilizers that contain insecticidal agents in the air blown into the container by the wind and then volatilize it (see Patent Documents 1 and 2).

[0003] The volatile agent described in Patent Document 1 comprises a carrier containing a volatile agent inside an elongated rectangular parallelepiped-shaped agent container having an opening. For example, it is used by hanging it from a doorknob, and the agent is mixed into the air blown into the agent container. The air containing the agent is then released through the opening in the agent container to volatilize, thereby eliminating or repelling flying insects such as mosquitoes and gnats that try to enter through the entrance.

[0004] The volatile agent described in Patent Document 2 comprises a carrier containing a volatile agent inside a rectangular plate-shaped agent container having an opening. It is used by hanging it, for example, from a clothesline or railing on a balcony. The agent is mixed into the air blown into the agent container, and the air containing the agent is released and volatilized through the opening provided in the agent container, thereby eliminating or repelling flying insects such as mosquitoes and gnats that try to enter through windows near the balcony. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2013-132216 [Patent Document 2] Japanese Patent Publication No. 2008-194034 [Overview of the project] [Problems that the invention aims to solve]

[0006] In the drug volatilizer described in Patent Document 1, the openings are provided on the front and back of the drug container. Each of the openings on the front and back of the drug container is formed by a collection of numerous square-shaped holes of the same size, arranged regularly at predetermined pitches in the vertical and horizontal directions. In the drug volatilizer of Patent Document 1, when the front and back of the drug container are superimposed, the openings on the front and back sides overlap to approximately coincide. Therefore, when installed in a location other than a door handle, air blown into the drug container from the front opening by airflow can easily escape to the outside of the drug container through the back opening. As a result, the air blown into the drug container may not be sufficiently infused with the drug before it is released to the outside of the drug container. Thus, there is room for improvement from the viewpoint of effectively volatilizing the drug.

[0007] In the drug volatilizer described in Patent Document 2, the openings are provided on the front and back of the drug container. Each of the openings on the front and back of the drug container is formed by a collection of multiple window-shaped holes, and most of the holes are drilled so that they are approximately the same size and arrangement when viewed from the front to the back. In the drug volatilizer of Patent Document 2, which has such openings, when the front and back of the drug container are superimposed, the openings on the front and back overlap to approximately coincide, similar to the drug container in Patent Document 1. Therefore, similar to the drug container in Patent Document 1, there is room for improvement from the viewpoint of effectively volatilizing the drug.

[0008] The present invention has been made in view of the above problems, and aims to provide a drug volatilization device that can sufficiently impregnate the blown-in air with a drug, thereby enabling the drug to be effectively volatilized.

Means for Solving the Problem

[0009] The characteristic configuration of the drug volatilization device according to the present invention for solving the above problems is as follows: A drug volatilization body that holds a volatile drug in a volatilizable manner, A housing container that houses the drug volatilization body in a ventilable manner, A drug volatilization device comprising: The housing container has: A first surface portion having a first opening, A second surface portion having a second opening, and is provided with: The first surface portion and the second surface portion are arranged to face each other, When the first surface portion and the second surface portion are overlapped, there are regions where the first opening and the second opening overlap and regions where the first opening and the second opening do not overlap, The area of the overlapping region is configured to be 20 to 80% of the area of the first opening or the area of the second opening.

[0010] According to the drug volatilization device of this configuration, when the first surface portion and the second surface portion are overlapped, there are regions where the first opening and the second opening overlap and regions where the first opening and the second opening do not overlap, and the area of the overlapping region is configured to be 20 to 80% of the area of the first opening or the area of the second opening. With such a configuration, air blown into the interior of the housing container from the first opening or the second opening due to the flow of wind is less likely to directly pass through the second opening or the first opening and escape to the outside of the housing container, and inside the housing container, the air becomes a turbulent flow state, and the volatile drug from the drug volatilization body and the air are mixed. As a result, the air blown into the interior of the housing container can be sufficiently contained with the drug, and the air sufficiently containing the drug can be discharged to the outside of the housing container. Therefore, the drug can be effectively volatilized.

[0011] In the drug volatilization device according to the present invention, The surface area of ​​the side of the volatile chemical material facing the first surface or the second surface is 1000 to 15000 mm². 2 It is preferable to set it to this value.

[0012] According to this configuration of the chemical volatilization device, the surface area of ​​the side of the chemical volatilizer facing the first or second surface is 1000 to 15000 mm². 2 Since it is set in this way, it is possible to secure a surface area that allows the drug to volatilize effectively.

[0013] In the drug volatilization device according to the present invention, When the surface of the first or second surface facing the volatile agent is considered to be a plane that can come into contact with the volatile agent and does not have the first or second opening, it is preferable that the overlapping area when the surface of the volatile agent facing the plane is projected onto the plane is set to 15% or less of the total surface area of ​​the volatile agent.

[0014] In this configuration of a drug volatilization device, when there is no first or second opening, the contactable area of ​​the drug volatilizer with the surface facing the first or second surface is set to 15% or less of the total surface area of ​​the drug volatilizer. In practice, since openings are provided on the first and second surfaces, the actual contactable area can be reliably kept smaller than 15% of the total surface area of ​​the drug volatilizer. By minimizing the portion of the drug volatilizer that can come into contact with the first or second surface, obstruction of drug volatilization can be avoided, and contamination of the containment container can be prevented.

[0015] In the drug volatilization device according to the present invention, Preferably, the area of ​​the first opening and the second opening are set to 10 to 50% of the total area of ​​the first surface and the second surface, respectively.

[0016] With this configuration of the chemical volatilization device, the area of ​​the first and second openings is set to 10-50% of the total area of ​​the first and second surfaces, respectively. This ensures that the amount of air taken in and released through the first and second openings is appropriate, allowing the chemical to exert its efficacy properly while avoiding excessive volatilization, and thus maintaining the chemical volatilization performance of the chemical volatilizer over a long period of time.

[0017] In the drug volatilization device according to the present invention, Preferably, the first opening and the second opening are formed by a collection of multiple holes.

[0018] With this configuration of chemical volatilization device, since the first and second openings are each formed by a collection of multiple holes, the air blown into the container from the first or second opening by the airflow is mixed with the chemical from the chemical volatilizer, and then passes through the multiple holes forming the second or first opening. The throttling effect increases the flow velocity by restricting the airflow at each hole, thereby increasing the rate at which the chemical is released from the container to the outside, and allowing the chemical to be volatilized more effectively.

[0019] In the drug volatilization device according to the present invention, The first surface portion is formed in a convex curved shape with an intermediate portion between both ends that protrudes outward from the container. The holes in the first surface are arranged from both ends to the middle portion of the first surface, It is preferable that the opening area of ​​the holes arranged in the manner described above increases as it progresses from the intermediate portion toward both ends.

[0020] In this configuration of a drug volatilization device, the first surface is formed as a convex curved surface with the intermediate portion between the two ends protruding outward from the container, and the multiple holes in the first surface are arranged from both ends to the intermediate portion. As a result, when air is drawn into the container through the multiple holes in the first surface, the air is drawn in from an external area that widens away from the convex curved surface, allowing air to be drawn in from a wider external area than when the first surface is flat. Also, when drug-containing air is released from inside the container to the outside through the multiple holes in the first surface, the drug-containing air is released towards an external area that widens away from the convex curved surface, allowing drug-containing air to be released to a wider external area than when the first surface is flat. However, when the first surface is formed as a convex curved surface, the air intake capacity that can be drawn into the container is structurally smaller in the end portion of the first surface, including the ends of the first surface, than in the intermediate portion of the first surface, including the intermediate portion of the container. Therefore, in the present invention, the opening area of ​​the multiple holes arranged from both ends to the middle of the first surface is set to increase as it progresses from the middle to both ends. As a result, at the ends of the containment container where the air intake capacity is relatively small, air is taken in through holes with a relatively large opening area, and as a result, air can be uniformly taken in throughout the entire interior of the containment container, and the drug can be impregnated evenly in the taken-in air.

[0021] In the drug volatilization device according to the present invention, The holes are located on a virtual spiral line virtually drawn on the first surface, which moves away from the center as it progresses in the direction of rotation, and are positioned from both ends of the first surface to the intermediate portion between those ends. Preferably, the opening area of ​​the hole portion is set to increase as it moves in the rotational direction.

[0022] In this configuration of the chemical volatilization device, the opening area of ​​the multiple holes arranged on the first surface is set to increase as it moves in the direction of rotation of the virtual spiral. Therefore, when the air blown into the container from the second opening on the second surface by the airflow is mixed with the chemical from the chemical volatilizer and then passes through the multiple holes on the first surface, the throttling effect that increases the flow velocity by narrowing the airflow at each hole increases as it approaches the center of the first surface and decreases as it moves away from the center in the direction of rotation of the virtual spiral. Consequently, chemical-containing air is released from the center of the first surface at a relatively high flow velocity, and the flow velocity of the released chemical-containing air decreases as it moves away from the center of the first surface in the direction of rotation of the virtual spiral. As a result, the chemical can be released from the first surface on a directional spiral airflow, allowing the chemical to be volatilized over a greater distance.

[0023] In the drug volatilization device according to the present invention, It is preferable that the ratio of the minimum opening area to the maximum opening area of ​​the hole is set to 3:5 to 3:80.

[0024] With this configuration of a chemical volatilization device, the ratio of the minimum opening area to the maximum opening area of ​​the multiple holes is set to 3:5 to 3:80. By narrowing the airflow at each hole, the throttling effect increases the flow velocity, resulting in an appropriate ratio between the amount of chemical volatilized over long distances at a relatively high flow velocity and the amount of chemical volatilized over short distances at a relatively low flow velocity, thus allowing the chemical to exert its efficacy appropriately.

[0025] In the drug volatilization device according to the present invention, The aforementioned hole is circular in shape or includes an arc. It is preferable that the shortest distance between the opening edge of one of the holes and the opening edge of another hole adjacent to that one hole is set to be 1 / 6 or more of the diameter of the one hole.

[0026] With this configuration of the chemical volatilization device, adjacent holes are arranged at a distance that allows them to function as independent holes, thereby suppressing mutual interference between air blown into the container through one hole and the other, and also suppressing mutual interference between air released to the outside of the container through one hole and the other, allowing for smooth air intake and release.

[0027] In the drug volatilization device according to the present invention, The aforementioned container further comprises a third surface having a third opening, Preferably, the third surface portion extends between the first surface portion and the second surface portion in a direction that intersects with the first surface portion and the second surface portion.

[0028] With this configuration of chemical volatilization device, in addition to the intake and release of air through the first and second openings provided on the first and second surfaces, air is also taken in and released through the third opening provided on the third surface, allowing the chemical to be volatilized over a wider area.

[0029] In the drug volatilization device according to the present invention, The aforementioned container is constructed by detachably fitting together one side container portion including the first surface portion and the other side container portion including the second surface portion. The container portion on one side has a projection that protrudes inward from the container. The other side container portion is formed with a pair of guide portions that can engage with both side edges of the protruding portion. When fitting together the one-sided container portion and the other-sided container portion, which are in a separated state, it is preferable that the protruding portion is guided by the guide portion.

[0030] With this configuration of the drug volatilization device, when fitting together one container section and the other container section which are in a separated state, the protrusion provided on the one container section is guided by a pair of guide sections provided on the other container section. As a result, the relative positions of the one container section and the other container section are correct, and the operation to fit the one container section and the other container section together and make the container usable can be performed smoothly.

[0031] In the drug volatilization device according to the present invention, The volatile agent has a vapor pressure of 2 × 10 at 30°C. -4 ~1 × 10 -2 It is preferable that the compound is a pyrethroid compound with mmHg.

[0032] This pesticide volatilization device, by holding a pyrethroid compound at a predetermined vapor pressure in a volatilizable state within the pesticide volatilizer, can effectively volatilize pests for use in controlling or repelling them. [Brief explanation of the drawing]

[0033] [Figure 1] Figure 1 shows a drug volatilization device according to the first embodiment. [Figure 2] Figure 2 is an explanatory diagram of the first opening. [Figure 3] Figure 3 is an explanatory diagram of the second opening. [Figure 4] Figure 4 shows the overlapping area between the first and second openings when the front section is superimposed on the back section. [Figure 5] Figure 5 shows the overlapping area between the first opening and the second opening when the rear section is superimposed on the front section. [Figure 6] Figure 6 is a longitudinal cross-sectional view of the drug volatilization device of the first embodiment. [Figure 7] Figure 7 shows the alignment structure between the front container section and the rear container section of the storage container. [Figure 8] Figure 8 shows a drug volatilization apparatus according to the second embodiment of the present invention. [Figure 9] Figure 9 is an explanatory diagram of the first opening. [Figure 10] Figure 10 is an explanatory diagram of the second opening. [Figure 11] Figure 11 shows the overlapping area between the first opening and the second opening when the front section is superimposed on the back section. [Figure 12] Figure 12 shows the overlapping area between the first opening and the second opening when the rear section is superimposed on the front section. [Figure 13] Figure 13 is a longitudinal cross-sectional view of the drug volatilization apparatus of the second embodiment. [Modes for carrying out the invention]

[0034] The present invention will be described below with reference to the drawings. However, the present invention is not intended to be limited to the embodiments and configurations described below or shown in the drawings.

[0035] [First Embodiment] Figure 1 shows a drug volatilization device 1A according to the first embodiment of the present invention. Figure 1(a) is a perspective view of the entire drug volatilization device 1A from the front. Figure 1(b) is a perspective view of the entire drug volatilization device 1A from the rear. Figure 1(c) is a perspective view of the entire drug volatilizer 3 incorporated into the drug volatilization device 1A from the front.

[0036] <Overall Structure> The drug volatilization device 1A shown in Figures 1(a) and (b) comprises a drug volatilizer 3 as shown in Figure 1(c) that holds a volatile drug in a volatilizable manner, a resin container 5 that houses the drug volatilizer 3 in a breathable manner, and a resin hook portion 7 attached to the container 5.

[0037] <Volatile chemicals> The volatilizing agent used in the present invention may be a sheet-like planar structure made of various materials, or a three-dimensional structure. Examples of sheet-like planar structures include natural materials such as pulp and linters, cellulose fibers such as rayon and viscose, or synthetic fibers such as polyester, polyethylene, polypropylene, and polyamide, as well as glass fibers. These can be intertwined to form a breathable sheet such as paper, cloth, nonwoven fabric, or felt, or a resin mesh formed by molding a resin composition into a grid or net. An example of a three-dimensional structure is the volatilizing agent 3 shown in Figure 1(c). This volatilizing agent 3 is constructed by joining multiple corrugated bodies, each formed from a rod-shaped body in a rectangular wave shape, by intersecting their vertices. The volatilizing agent 3 is formed using a resin composition containing a volatile agent, and the kneaded volatile agent can bleed onto the surface of the three-dimensional structure and volatilize from that surface.

[0038] The resin composition that constitutes the resin mesh of the planar structure or the three-dimensional structure described above is, for example, a composition that contains a volatile agent including an insecticidal component in the resin, and is a composition that is capable of volatilizing the contained volatile agent, and is usually manufactured using resin pellets containing the volatile agent.

[0039] Specifically, the present invention provides insect repellent component-containing resin pellets, which are formed by supporting an insect repellent component as a volatile agent on a fine powder carrier as needed, and kneading this together with a resin. In the case of transfluthrin as the insect repellent component, a crystal precipitation inhibitor component is also included. These pellets can be used as a masterbatch, and if necessary, additional resin can be mixed and kneaded with them to form a resin composition that can be used as a material for manufacturing various resin molded products. The insect repellent component-containing resin pellets according to this invention can be transported and stored in their original form, and the occurrence of bleeding, crystal precipitation, etc., during transport is suppressed.

[0040] The above-mentioned resin is not particularly limited as long as it is possible to gradually volatilize the contained volatile agent from the surface, either as is or when using a carrier as described later. Examples include polyolefin resins such as polyethylene (PE) including branched low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE), and polypropylene (PP), or polyolefin copolymers of these with carboxylic acid esters (vinyl acetate, methyl methacrylate, ethyl methacrylate, etc.). Such carboxylic acid esters are effective in controlling the volatilization of volatile agents from the resin surface, and generally, the higher the blending ratio of carboxylic acid ester to polyolefin resin, the slower the bleeding rate of the volatile agent tends to be. In the present invention, ethylene-vinyl acetate copolymer (EVA) and ethylene-methyl methacrylate copolymer (EMMA), in which carboxylic acid ester is blended in an amount of 1 to 35% by weight relative to the polyolefin resin, are preferably used. In addition, polymer blends obtained by adjusting and mixing the content ratio of polyolefin copolymers and olefin homopolymers can be used, and other polymer compounds such as styrene elastomers can be included as needed. The term "carboxylic acid ester" above refers to an unsaturated carboxylic acid ester or a vinyl carboxylic acid ester.

[0041] In particular, in this invention, it is especially preferable to include an ethylene-vinyl acetate copolymer (ethylene-vinyl acetate resin). The ethylene-vinyl acetate copolymer not only functions as a resin component constituting the pellet, but also acts as a bleed regulator for the insect repellent components transfluthrin, metofluthrin, and profluthrin. The amount of this ethylene-vinyl acetate copolymer is 5% by mass or more, preferably 10% by mass or more, and more preferably 15% by mass or more, relative to the total pellet when the insect repellent components are transfluthrin or profluthrin. On the other hand, the upper limit is preferably 50% by mass or less, and more preferably 45% by mass or less. When the insect repellent component is metofluthrin, 5% by mass or more and 35% by mass or less is appropriate. Furthermore, when the insect repellent component is a mixture mainly composed of metofluthrin, 10% by mass or more and 35% by mass or less is preferable.

[0042] The volatile insecticides containing the above-mentioned insecticidal components are not particularly limited as long as the active ingredient is volatile, and other components such as repellents, fragrances, deodorizers, fungicides, and antibacterial agents can be used in combination.

[0043] The above insecticidal components include pyrethroid insecticides such as transfluthrin, metofluthrin, empenthrin, profluthrin, allethrin, flamethrin, prallethrin, resmethrin, phthalthrin, phenothrin, and natural pyrethrins; organophosphate insecticides such as dichlorvos, fenitrothion, and malathrin; and insect growth regulators such as methoprene and hydroprene. Among these, those with a vapor pressure of 2 × 10⁻⁶ at 30°C are particularly noteworthy. -4 ~1 × 10 -2 Preferably, the compound is selected from the mmHg pyrethroid compounds transfluthrin, metofluthrin, empenthrin, and profluthrin. Some of these compounds may have optical or geometric isomers based on chiral carbons or unsaturated bonds, and of course, each of these compounds individually or any mixture thereof is also included in the present invention.

[0044] Examples of the above-mentioned repellents include 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidine carboxylate (icaridin), ethyl butylacetylaminopropionate (IR3535), N,N-diethyltoluamide (DEET), dimethyl phthalate, dibutyl phthalate, 2-ethyl-hexanediol, dibutyl succinate, and p-menthane-3,8-diol.

[0045] Examples of the above-mentioned fragrances include citronella oil, orange oil, lemon oil, lime oil, yuzu oil, lavender oil, peppermint oil, eucalyptus oil, jasmine oil, cypress oil, green tea essential oil, limonene, α-pinene, linalool, geraniol, phenylethyl alcohol, amyl cinnamic aldehyde, and benzyl acetate.

[0046] Examples of volatile deodorizers include cypress oil, hinoki oil, bamboo extract, mugwort extract, tung oil, and pyruvate esters such as ethyl pyruvate and phenylethyl pyruvate.

[0047] Examples of the above-mentioned antifungal agents include 2-n-octyl-4-isothiazolin-3-one, isopropylmethylphenol, and orthophenylphenol.

[0048] Examples of the above-mentioned antibacterial agents include hinokitiol, tetrahydrolinalool, eugenol, citronellal, and allyl isothiocyanate.

[0049] The above-mentioned volatile agent-containing resin pellets may, if necessary, be used in combination with a fine powder carrier such as talc, alumina, silica, microcrystalline silica or fine powdered silicic acid, diatomaceous earth, zeolites, clay minerals, or wood powder. Furthermore, colorants, stabilizers, antistatic agents, etc., may be added as appropriate. Using a fine powder carrier allows the volatile agent, such as the insect repellent component, to be supported within the pellets. It is also convenient to adopt a manufacturing process for the resin composition in which a masterbatch containing a high concentration of the volatile agent is prepared in the first step, and then diluted to a predetermined concentration using resin in the second step. However, this may also cause interconnected bubbles to form from the inside to the surface of the resin composition, making it easier for the volatile agent inside to bleed to the surface.

[0050] The content of volatile agents in the above resin composition is appropriately determined depending on the type of volatile agent used, the type of resin, the usage environment, the usage period, etc. While a higher content of volatile agents is necessary for longer usage periods, it is appropriate to set it within the range of 1 to 20% by mass.

[0051] The molding method is not particularly limited, and methods such as extrusion molding, injection molding, press molding, and vacuum molding can be used, but extrusion molding and injection molding are particularly suitable.

[0052] The volatile agent according to this invention, when contained in the containment container 5 described later and used, exhibits excellent insecticidal or repellent effects against many insects and other arthropods, specifically mosquitoes such as Culex pipiens, Culex tritaeniorhynchus, and Aedes albopictus, black flies, midges, midges, flies, drain flies, clothes moths, wasps, and spiders.

[0053] <container> As shown in Figures 1(a) and (b), the container 5 has a roughly rectangular parallelepiped shape that is elongated vertically when in use, and comprises a front container section 11 that forms the front part and a rear container section 13 that forms the rear part. The front container section 11 and the rear container section 13 are kept in a fitted state by mutually engaging locking means 15 provided at required locations, and can be separated from each other by releasing the locking state by the locking means 15, allowing the volatile chemical 3 to be put in and taken out of the container 5. In the following description, unless otherwise specified, "chemical" refers to the volatile chemical described above.

[0054] As shown in Figure 1(a), the front container section 11 comprises a front section 21, an upper section 23, a lower section 25, and left and right side sections 27. These sections 21, 23, 25, and 27 are all made of plate-like members. The front section 21 is formed as a convex curved surface with an intermediate section between its two ends in the vertical direction projecting outward (forward in this example) towards the container 5. The upper section 23 and the lower section 25 are integrally attached to the upper and lower edges of the front section 21, respectively, in a direction intersecting the front section 21 (horizontal in this example) and extending toward the rear. The side sections 27 are integrally attached to the left and right side edges of the front section 21, in a direction intersecting the front section 21 (horizontal in this example) and extending toward the rear.

[0055] As shown in Figure 1(b), the rear container portion 13 comprises a rear portion 31, an upper portion 33, a lower portion 35, and left and right side portions 37. These portions 31, 33, 35, and 37 are all made of plate-like material. The rear portion 31 is formed in a strip shape that extends flat in the vertical direction. The upper portion 33 and the lower portion 35 are integrally attached to the upper and lower edges of the rear portion 31, respectively, in a direction intersecting the rear portion 31 (horizontal in this example) and extending forward. The left and right side edges of the rear portion 31 are integrally attached, in a direction intersecting the rear portion 31 (horizontal in this example) and extending forward. The rear container portion 13 is also provided with a projection 41 to ensure a gap between it and the door surface when the chemical vaporization device 1A is suspended from a doorknob, and with an adjustment hole / opening 43 for engaging the hook portion 7.

[0056] Here, the front portion 21 corresponds to the "first surface portion" of the present invention. The rear portion 31 corresponds to the "second surface portion" of the present invention. The side portion 61 of the storage container 5, including the upper portions 23, 33, lower portions 25, 35 and each side portion 27, 37 of the front side container portion 11 and the rear side container portion 13, corresponds to the "third surface portion" of the present invention.

[0057] <First opening> Figure 2 is an explanatory diagram of the first opening 10. As shown in Figure 2, the front portion 21 has the first opening 10. The first opening 10 is formed by a collection of multiple holes 45A, 45B drilled in the front portion 21 in a predetermined arrangement. In this example, the first opening 10 includes multiple circular holes 45A and multiple roughly teardrop-shaped holes 45B that include an arc portion that combines a part of a circle and a part of a rounded triangle. The multiple holes 45B are arranged near the center position in the vertical direction of the front portion 21. The multiple holes 45B are arranged at a predetermined pitch in the vertical and horizontal directions such that the shape of the envelope line enclosing all of the multiple holes 45B has a bulge in the vertical direction. The multiple holes 45A are arranged from both ends in the vertical direction of the front portion 21 to the intermediate part near the multiple holes 45B. The multiple holes 45A are arranged at a predetermined pitch in the vertical, horizontal, and vertical directions, with respect to the multiple holes 45B, such that the spacing between them increases sequentially as you move toward both ends in the vertical direction on the front surface 21. The first opening 10 is mostly composed of holes 45A. Hereafter, when referring to holes 45A and holes 45B collectively, they will be referred to as holes 45.

[0058] The opening area of ​​the multiple holes 45A arranged as described above is set to increase as you move from the middle of the front surface 21 in the vertical direction toward both ends.

[0059] <Area of ​​the first opening> The area of ​​the first opening 10 formed by the collection of holes 45 is preferably set to 10 to 50% of the total area of ​​the front surface 21, and more preferably to 10 to 30%.

[0060] As described above, by setting the area of ​​the first opening 10 to within the range of 10-50% of the total area of ​​the front section 21, the amount of air taken in and released through the first opening 10 becomes appropriate, allowing the efficacy of the pesticide to be properly exerted while avoiding excessive volatilization of the pesticide, and enabling the pesticide volatilization performance of the pesticide volatilizer 3 to be maintained over a long period of time. If the area of ​​the first opening 10 is less than 10% of the total area of ​​the front section 21, there is a risk that the efficacy of the pesticide may not be fully exerted. If the area of ​​the first opening 10 is greater than 50% of the total area of ​​the front section 21, there is a risk that the pesticide volatilization performance of the pesticide volatilizer 3 cannot be maintained over a long period of time due to excessive volatilization of the pesticide.

[0061] <Ratio of hole area on the front surface> Here, the entire front view area of ​​the front portion 21 is divided into three equal parts vertically, defining the upper end region 101A, the lower end region 101B, and the intermediate region 101C between these end regions 101A and 101B. In this case, it is preferable that the ratio of the opening area of ​​any one of the multiple holes 45 provided in the intermediate region 101C to the opening area of ​​any one of the multiple holes 45 provided in the upper end region 101A and the lower end region 101B be set to 6:1 to 6:36.

[0062] As described above, by setting the opening area ratio of the holes 45 to the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the first opening 10 in the vertical region of the front portion 21 can be kept within a predetermined allowable range, and the excessive reduction of the chemical contained in the chemical volatilizer 3 in the vertical direction can be prevented. If the opening area ratio of the holes 45 falls outside the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the first opening 10 will exceed the predetermined allowable range and may become excessive, potentially causing the chemical contained in the chemical volatilizer 3 to be excessively reduced in the vertical direction.

[0063] <Maximum and minimum hole area ratio on the front surface> In the front portion 21, it is preferable that the ratio of the minimum opening area to the maximum opening area of ​​the multiple holes 45 be set to 3:5 to 3:80.

[0064] As described above, by setting the maximum-to-minimum area ratio of the multiple holes 45 within the range of 3:5 to 3:80, the throttling effect, which increases the flow velocity by restricting the airflow at the holes 45, results in an appropriate ratio between the amount of drug volatilized over long distances at a relatively high flow velocity and the amount of drug volatilized over short distances at a relatively low flow velocity, thereby allowing the drug to exert its efficacy appropriately. If the maximum-to-minimum area ratio of the holes 45 falls outside the range of 3:5 to 3:80, the balance between the amount of drug volatilized over long distances and the amount volatilized over short distances will be poor, and there is a risk that the drug's efficacy will not be properly exerted.

[0065] <Shortest distance between adjacent holes> It is preferable that the shortest distance between the opening edge of one of the multiple holes 45 and the opening edge of another hole 45 adjacent to that hole 45, i.e., the distance (L1) in the example shown in Figure 2, be set to 1 / 6 (approximately 0.2) or more of the diameter (D1) of the one hole 45.

[0066] As described above, by setting the shortest distance (L1) between adjacent holes 45 to be 1 / 6 or more of the diameter (D1) of one hole 45, adjacent holes 45 are arranged at a distance that allows them to function as independent holes. This suppresses mutual interference of air blown into the interior of the containment container 5 through one hole 45 and the other holes 45, and also suppresses mutual interference of air released to the outside of the containment container 5 through one hole 45 and the other holes 45, allowing for smooth air intake and release.

[0067] <Second opening> Figure 3 is an explanatory diagram of the second opening 20. As shown in Figure 3, the back portion 31 has a second opening 20. The second opening 20 is formed by a collection of multiple holes 47A, 47B, and 47C drilled in the back portion 31 in a predetermined arrangement. In this example, the second opening 20 includes multiple circular holes 47A with relatively small diameters and the same opening area, multiple holes 47B with larger diameters and larger opening areas than the holes 47A, and a single circular hole 47C with a larger diameter and even larger opening area than the holes 47B. The hole 47C is located in the middle position in the vertical, horizontal, and vertical directions of the back portion 31, i.e., at the center position. The multiple holes 47B are arranged on both the left and right sides of the hole 47C at predetermined intervals. Some of the multiple holes 47A are arranged at predetermined pitches in the vertical, horizontal, and vertical directions such that the shape of the envelope, which surrounds hole 47C and multiple holes 47B and encloses all of the aforementioned partial holes 47A, has a bulge in the vertical direction. The remaining multiple holes 47A are arranged from positions near both ends in the vertical direction on the back surface 31 to the intermediate part near the aforementioned partial holes 47A. The remaining holes 47A are arranged at predetermined pitches in the vertical, horizontal, and vertical directions such that the spacing between them and the aforementioned partial holes 47A increases sequentially as the direction toward both ends in the vertical direction on the back surface 31 progresses. The second opening 20 is mostly composed of holes 47A. Hereafter, when holes 47A, 47B, and 47C are referred to collectively as hole 47.

[0068] <Area of ​​the second opening> The area of ​​the second opening 20 formed by the collection of holes 47 is preferably set to 10 to 50% of the total area of ​​the back surface 31, and more preferably to 10 to 30%.

[0069] As described above, by setting the area of ​​the second opening 20 to within 10-50% of the total area of ​​the back surface 31, the amount of air taken in and released through the second opening 20 becomes appropriate, allowing the efficacy of the chemical to be properly exerted while avoiding excessive volatilization of the chemical, and enabling the chemical volatilization performance of the chemical volatilizer 3 to be maintained over a long period of time. If the area of ​​the second opening 20 is less than 10% of the total area of ​​the back surface 31, there is a risk that the efficacy of the chemical may not be fully exerted. If the area of ​​the second opening 20 is greater than 50% of the total area of ​​the back surface 31, there is a risk that the chemical volatilization performance of the chemical volatilizer 3 cannot be maintained over a long period of time due to excessive volatilization of the chemical.

[0070] <Percentage of hole area on the back surface> Here, the entire rear view area of ​​the rear portion 31 is divided into three equal parts vertically, defining the upper end region 103A, the lower end region 103B, and the intermediate region 103C between these end regions 103A and 103B. In this case, it is preferable that the ratio of the opening area of ​​any one of the multiple holes 47 provided in the intermediate region 103C to the opening area of ​​any one of the multiple holes 47 provided in the upper end region 103A and the lower end region 103B be set to 6:1 to 6:36.

[0071] As described above, by setting the opening area ratio of the holes 47 to the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the second opening 20 in the vertical region of the back portion 31 can be kept within a predetermined allowable range, and the excessive reduction of the chemical contained in the chemical volatilizer 3 in the vertical direction can be prevented. If the opening area ratio of the holes 47 falls outside the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the second opening 20 will exceed the predetermined allowable range and may become excessive, potentially causing the chemical contained in the chemical volatilizer 3 to be excessively reduced in the vertical direction.

[0072] <Maximum and minimum area ratio of holes on the back surface> In the rear portion 31, it is preferable that the ratio of the minimum opening area to the maximum opening area of ​​the multiple holes 47 is set to 3:5 to 3:80.

[0073] As described above, by setting the maximum and minimum area ratio of the plurality of holes 47 within the range of 3:5 to 3:80, the throttle effect of increasing the flow velocity by constricting the air flow through the holes 47 makes the ratio of the amount of the drug volatilized far away at a relatively high flow velocity to the amount of the drug volatilized at a relatively low flow velocity at a short distance appropriate, and the efficacy of the drug can act appropriately. When the maximum and minimum area ratio of the holes 47 is out of the range of 3:5 to 3:80, the balance between the amount of the drug volatilized far away and the amount of the drug volatilized at a short distance deteriorates, and there is a possibility that the efficacy of the drug cannot act appropriately.

[0074] <Shortest distance between adjacent holes> The shortest distance between the opening edge of one of the plurality of holes 47 and the opening edge of another hole 47 adjacent to the one hole 47, that is, in the example shown in FIG. 3, the distance (L 11 , L 13 , L 21 ) is preferably set to be 1 / 6 (about 0.2) or more of the size of the diameter (diameter D 10 , D 20 ) of one hole 47.

[0075] As described above, by setting the shortest distance (L 11 , L 13 , L 21 ) between adjacent holes 47 to be 1 / 6 or more of the size of the diameter (diameter D 10 , D 20 ) of one hole 47, the adjacent holes 47 are arranged at a distance where they function as independent holes, and the mutual interference of the air blown into the inside of the storage container 5 through each of one hole 47 and the other hole 47 can be suppressed, and the mutual interference of the air discharged to the outside of the storage container 5 through each of one hole 47 and the other hole 47 can be suppressed, and the intake and discharge of the air can be performed smoothly.

[0076] <Overlap area ratio of the first opening and the second opening> Figure 4 shows the overlapping region of the first opening 10 and the second opening 20 when the front portion 21 is superimposed on the back portion 31. As shown in Figure 4, when the front portion 21 and the back portion 31 are superimposed and viewed from the front, there is a region where the holes 45 constituting the first opening 10 and the holes 47 constituting the second opening 20 overlap (the region with shaded hatching in Figure 4), and a region where the holes 45 and 47 do not overlap. Preferably, the area of ​​the region where the holes 45 and 47 overlap is set to 20-80% of the area of ​​the holes 47 constituting the first opening 10.

[0077] Figure 5 shows the overlapping region of the first opening 10 and the second opening 20 when the rear section 31 is superimposed on the front section 21. As shown in Figure 5, when the front section 21 and the rear section 31 are superimposed and viewed from the rear side, there is a region where the holes 45 constituting the first opening 10 and the holes 47 constituting the second opening 20 overlap (the area with shaded hatching in Figure 5), and a region where the holes 45 and 47 do not overlap. Preferably, the area of ​​the region where the holes 45 and 47 overlap is set to 20-80% of the area of ​​the holes 47 constituting the second opening 20.

[0078] <Ratio of contactable surface area with the containment container to the total surface area of ​​the volatile substance> Figure 6 is a longitudinal cross-sectional view of the pesticide volatilization device 1A. In Figure 6, the surface area of ​​the surface 3a on the side of the pesticide volatilizer 3 facing the front portion 21 is 1000 to 6000 mm². 2 It is set to, preferably 1000-5000mm 2 It is set to, more preferably 1000~4000mm 2 The surface area of ​​the surface 3b on the side of the drug volatilizer 3 facing the back portion 31 is set to 1000 to 6000 mm². 2 It is set to, preferably 1000-5000mm 2 It is set to, more preferably 1000~4000mm 2This is set to ensure a surface area that can effectively volatilize the drug. Furthermore, in Figure 6, when the surface 31a on the back portion 31 facing the drug volatilizer 3 is considered to be a plane that can contact the drug volatilizer 3 and does not have a second opening 20, it is preferable that the overlapping area when the surface 3b on the side of the drug volatilizer 3 facing the aforementioned plane is projected onto the aforementioned plane is set to 15% or less of the total surface area of ​​the drug volatilizer 3. Note that the surface area of ​​the surface 3a (3b) on the side of the drug volatilizer 3 facing the front portion 21 (back portion 31) is the area of ​​surface 3a (3b) only, and does not include the surface area of ​​the depth portion of the three-dimensional structure (column structure portion 3c between surface 3a and surface 3b). Also, the surface 3b on the side of the drug volatilizer 3 facing the aforementioned plane is the surface of surface 3b only, and does not include the surface of the column structure portion 3c.

[0079] As described above, when the ratio of the contactable area with the containment container 5 to the total surface area of ​​the volatile agent 3 is set to 15% or less, since the holes 47 that constitute the second opening 20 are actually provided in the back portion 31, the actual contactable area can be reliably kept smaller than 15% of the total surface area of ​​the volatile agent 3. In this way, by minimizing the portion of the volatile agent 3 that can come into contact with the back portion 31, obstruction of volatilization of the agent can be avoided, and contamination of the containment container 5 can be prevented. Furthermore, as mentioned above, the front portion 21 is formed in the shape of a convex curved surface that protrudes forward (to the left in Figure 6), so there is almost no portion of the volatile agent 3 that can come into contact with the front portion 21, and it goes without saying that this can be reliably kept smaller than 15% of the total surface area of ​​the volatile agent 3.

[0080] As shown in Figure 6, the front portion 21 is formed as a convex curved surface with the middle portion between the two ends projecting outward (forward) from both ends in the vertical direction, and the multiple holes 45 in the front portion 21 are arranged from both ends in the vertical direction to the middle portion. As a result, when air is drawn into the inside of the container 5 through the multiple holes 45 in the front portion 21, the air is drawn in from an external area that widens away from the convex curved surface of the front portion 21, allowing air to be drawn in from a wider external area than when the front portion 21 is flat. Also, when drug-containing air is released from inside the container 5 to the outside of the container 5 through the multiple holes 45 in the front portion 21, the drug-containing air is released towards an external area that widens away from the convex curved surface of the front portion 21, allowing drug-containing air to be released to a wider external area than when the front portion 21 is flat.

[0081] Incidentally, when the front portion 21 is formed in a convex curved shape, the capacity of air that can be taken into the inside of the containment container 5 is structurally smaller in the end portion 5b, which includes the ends of the front portion 21, compared to the capacity of the middle portion 5a, which includes the middle part of the front portion 21 of the containment container 5. Therefore, the opening area of ​​the multiple holes 45 arranged from both ends in the vertical direction of the front portion 21 to the middle portion is set to increase as you move from the middle portion toward both ends (see Figure 2). As a result, in the end portion 5b of the containment container 5, where the air intake capacity is relatively small, air is taken in through the holes 45, which have a relatively large opening area. Consequently, air can be taken in uniformly throughout the inside of the containment container 5, and the taken-in air can be evenly impregnated with the drug.

[0082] As shown in Figures 1(a) and (b), the left and right side portions of the container 5, which are formed by the side portion 27 of the front container portion 11 and the side portion 37 of the rear container portion 13, have a third opening 30. The third opening 30 is formed by a collection of multiple elongated, rounded rectangular holes 49 in the vertical direction. Thus, in addition to the intake and release of air through the holes 45 that constitute the first opening 10 and the holes 47 that constitute the second opening 20, air is also taken in and released through the holes 49 that constitute the third opening 30, allowing the chemical to be dispersed over a wider area.

[0083] <Alignment structure of each container part in the containment container> Figure 7 shows the alignment structure of the front container portion 11 and the rear container portion 13 in the storage container 5. Figure 7(a) is a diagram of the state before the front container portion 11 and the rear container portion 13 are fitted together. Figure 7(b) is a diagram of the state after the front container portion 11 and the rear container portion 13 are fitted together. As shown in Figures 7(a) and (b), the front container portion (one side container portion) 11 has a tongue-shaped projection 51 that protrudes toward the inside of the storage container 5. On the other hand, the rear container portion 13 has a pair of elongated plate-shaped guide portions 53 that protrude toward both side edges of the projection 51 so as to be engageable with them. Furthermore, the rear container portion (other side container portion) 13 has a pair of positioning protrusions 55 that are arranged on the outside of the pair of guide portions 53 so as to be adjacent to them, while the front container portion 11 has a pair of notched positioning recesses 57 that are engageable with the pair of positioning protrusions 55.

[0084] When the front container section 11 and the rear container section 13, which are separated as shown in Figure 7(a), are to be fitted together as shown in Figure 7(b), the protruding portion 51 is guided by a pair of guide portions 53 so that the relative positions of the front container section 11 and the rear container section 13 are appropriate, that is, the center positions of the front container section 11 and the rear container section 13 are aligned. Finally, the engagement of a pair of positioning protrusions 55 and a pair of positioning recesses 57 ensures that the front container section 11 and the rear container section 13 are positioned in a relative position suitable for the fitted state. In this way, the operation of fitting the front container section 11 and the rear container section 13 together to make the container 5 usable can be performed smoothly.

[0085] As shown in Figures 1(a) and (b), the hook portion 7 is a string-shaped molded product, and is provided with locking portions (not shown) at both ends for engaging with adjustment holes and openings 43 formed in the storage container 5 (rear side container portion 13).

[0086] As described above, the chemical volatilization device 1A, with the chemical volatilizer 3 built into the containment container 5, is used by hanging it from, for example, the doorknob of the entrance using the hook part 7. The chemical is impregnated into the air blown into the containment container 5 through, for example, the first opening 10, and the air containing the chemical is released and volatilized through the second opening 20 and the third opening 30, thereby eliminating or repelling flying insects such as mosquitoes, midges, and drain flies that try to enter through the entrance.

[0087] In the first embodiment of the pesticide volatilization device 1A, as shown in Figures 4 and 5, when the front portion 21 and the back portion 31 are superimposed, there is an area where the holes 45 and 47 overlap, and an area where the holes 45 and 47 do not overlap. The area of ​​the overlapping area (shown by shaded hatching in Figures 4 and 5) is configured to be 20-80% of the area of ​​the first opening 10 or the area of ​​the second opening 20. With this configuration, the air blown into the containment container 5 from the first opening 10 by the airflow is less likely to escape to the outside of the containment container 5 through the second opening 20. As a result, the air inside the containment container 5 becomes turbulent, and the pesticide from the pesticide volatilizer 3 and the air are mixed. Consequently, the air blown into the containment container 5 can be sufficiently infused with the pesticide, and the air containing the pesticide can be released to the outside of the containment container 5. Therefore, the pesticide can be effectively volatilized, and flying insects can be effectively exterminated or repelled.

[0088] [Second Embodiment] Figure 8 shows a pesticide volatilization device 1B according to a second embodiment of the present invention. Figure 8(a) is a front perspective view of the entire pesticide volatilization device 1B. Figure 8(b) is a rear perspective view of the entire pesticide volatilization device 1B. Figure 8(c) is a front perspective view of the entire pesticide volatilizer 63 incorporated into the pesticide volatilization device 1B. Figures 8(d) and (e) are a plan view and a bottom view of the pesticide volatilization device 1B.

[0089] <Overall Structure> The drug volatilization device 1B shown in Figures 8(a) and (b) comprises a drug volatilizer 63 with a three-dimensional mesh structure as shown in Figure 8(c) that holds the drug in a volatilizable manner, a resin container 65 that houses the drug volatilizer 63 in a breathable manner, and a resin hook portion 67 attached to the container 65.

[0090] <Volatile chemicals> The pesticide volatilizer 63 is basically the same as the pesticide volatilizer 3 used in the pesticide volatilizer 1A of the first embodiment, except for its size. Therefore, a detailed explanation will be omitted here.

[0091] <container> As shown in Figures 8(a) and (b), the container 65 is a rectangular plate of a predetermined thickness with its surface facing horizontally when in use, and comprises a front container portion 71 that constitutes the front side and a rear container portion 73 that constitutes the rear side. The front container portion 71 and the rear container portion 73 are kept in a fitted state by mutually engaging locking means 75 provided at required locations, and can be separated from each other by releasing the locking state by the locking means 75, allowing the drug volatilizer 63 to be inserted into and removed from the container 65.

[0092] The front container section 71 comprises a front section 81, an upper section 83, a lower section 85, and left and right side sections 87. These sections 81, 83, 85, and 87 are all made of plate-like members. The front section 81 is formed in a rectangular shape that extends flat in the vertical, horizontal, and vertical directions by predetermined dimensions. The upper section 83 and the lower section 85 are integrally attached to the upper and lower edges of the front section 81, respectively, in a direction intersecting the front section 81 (horizontal in this example) and extending toward the rear. The side sections 87 are integrally attached to the left and right side edges of the front section 81, in a direction intersecting the front section 81 (horizontal in this example) and extending toward the rear.

[0093] The rear container section 73 comprises a rear section 91, an upper section 93, a lower section 95, and left and right side sections 97. These sections 91, 93, 95, and 97 are all made of plate-like members. The rear section 91 is formed in a rectangular shape that extends flat in the vertical, horizontal, and vertical directions by predetermined dimensions. The upper section 93 and the lower section 95 are integrally attached to the upper and lower edges of the rear section 91, respectively, in a direction intersecting the rear section 91 (horizontal in this example) and extending forward. The side sections 97 are integrally attached to the left and right side edges of the rear section 91, in a direction intersecting the rear section 91 (horizontal in this example) and extending forward.

[0094] Here, the front portion 81 corresponds to the "first surface portion" of the present invention. The rear portion 91 corresponds to the "second surface portion" of the present invention. The side portion 121 of the storage container 65, including the upper portions 83, 93, lower portions 85, 95, and each side portion 87, 97 of the front side container portion 71 and the rear side container portion 73, corresponds to the "third surface portion" of the present invention.

[0095] <First opening> Figure 9 is an explanatory diagram of the first opening 70. As shown in Figure 9, the front portion 81 has the first opening 70. The first opening 70 is formed by a collection of multiple holes 105A, 105B drilled in the front portion 81 in a predetermined arrangement. In this example, the first opening 70 includes multiple circular holes 105A and one semicircular hole 105B. The multiple holes 105A are arranged on a virtual spiral line 100 that is virtually drawn on the front portion 81, which moves away from the center as it progresses in the spiral direction, and extends from both ends in the vertical direction of the front portion 81 to the intermediate part between those ends. The one hole 105B is located on one side (the left side in Figure 9) in the intermediate part between the two ends in the vertical direction of the front portion 81. The first opening 70 is mostly composed of holes 105A. In the following, when referring to both hole 105A and hole 105B collectively, they shall be referred to as hole 105.

[0096] The opening areas of the multiple holes 105A arranged as described above are set to increase as they advance in the direction of rotation from the center of the virtual spiral 100.

[0097] <Area of ​​the first opening> The area of ​​the first opening 70 formed by the collection of holes 105 is preferably set to 10-50% of the total area of ​​the front surface 81, and more preferably to 10-30%.

[0098] As described above, by setting the area of ​​the first opening 70 to within 10-50% of the total area of ​​the front section 81, the amount of air taken in and released through the first opening 70 becomes appropriate, allowing the efficacy of the pesticide to be properly exerted while avoiding excessive volatilization of the pesticide, and enabling the pesticide volatilization performance of the pesticide volatilizer 63 to be maintained over a long period of time. If the area of ​​the first opening 70 is less than 10% of the total area of ​​the front section 81, there is a risk that the efficacy of the pesticide may not be fully exerted. If the area of ​​the first opening 70 is greater than 50% of the total area of ​​the front section 81, there is a risk that the pesticide volatilization performance of the pesticide volatilizer 63 cannot be maintained over a long period of time due to excessive volatilization of the pesticide.

[0099] <Ratio of hole area on the front surface> Here, the entire front view area of ​​the front portion 81 is divided into three equal parts vertically, defining the upper end region 201A, the lower end region 201B, and the intermediate region 201C between these end regions. In this case, it is preferable that the ratio of the opening area of ​​any one of the multiple holes 105 provided in the intermediate region 201C to the opening area of ​​any one of the multiple holes 105 provided in the upper end region 201A and the lower end region 201B be set to 6:1 to 6:36.

[0100] As described above, by setting the opening area ratio of the holes 105 to the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the first opening 70 in the vertical region of the front portion 81 can be kept within a predetermined allowable range, and the amount of chemical contained in the chemical volatilizer 63 can be prevented from being excessively reduced in the vertical direction. If the opening area ratio of the holes 105 falls outside the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the first opening 70 will exceed the predetermined allowable range and become excessive, which may cause the amount of chemical contained in the chemical volatilizer 63 to be excessively reduced in the vertical direction.

[0101] <Maximum and minimum hole area ratio on the front surface> In the front portion 81, it is preferable that the ratio of the minimum opening area to the maximum opening area of ​​the multiple holes 105 be set to 3:5 to 3:80.

[0102] As described above, by setting the maximum-to-minimum area ratio of the holes 105 to the range of 3:5 to 3:80, the throttling effect, which increases the flow velocity by restricting the airflow at the holes 105, results in an appropriate ratio between the amount of drug volatilized over long distances at a relatively high flow velocity and the amount of drug volatilized over short distances at a relatively low flow velocity, allowing the drug's efficacy to work properly. If the maximum-to-minimum area ratio of the holes 105 falls outside the range of 3:5 to 3:80, the balance between the amount of drug volatilized over long distances and the amount volatilized over short distances will be poor, and there is a risk that the drug's efficacy will not work properly.

[0103] <Shortest distance between adjacent holes> The shortest distance between the opening edge of one of the multiple holes 105 and the opening edge of another hole 105 adjacent to that hole 105, i.e., in the example shown in Figure 9, the distance (L 31 ) is the diameter of one hole 105 (Diameter D 30 It is preferable to set it to 1 / 6 (approximately 0.2) or more of the size of ).

[0104] As described above, the shortest distance between adjacent holes 105 (L 31 ) is the diameter of one hole 105 (Diameter D 30 By setting the size to 1 / 6 or more of the size of the hole, adjacent holes 105 are arranged at a distance that allows them to function as independent holes, thereby suppressing mutual interference of air blown into the interior of the containment container 65 through one hole 105 and the other hole 105, and also suppressing mutual interference of air released to the outside of the containment container 65 through one hole 105 and the other hole 105, allowing for smooth intake and release of air.

[0105] <Second opening> Figure 10 is an explanatory diagram of the second opening 80. As shown in Figure 10, the back portion 91 has the second opening 80. The second opening 80 is formed by a collection of multiple holes 107A, 107B, and 107C drilled in the back portion 91 in a predetermined arrangement. In this example, the second opening 80 includes multiple circular holes 107A, multiple semicircular holes 107B, and multiple holes 107C that are shaped like a circle with a part cut out. The multiple holes 107A are arranged from one end (the lower end in this example) of both ends in the vertical direction of the back portion 91 to the intermediate part between those ends. The multiple holes 107A are arranged alternately at a predetermined pitch such that the distance between centers in the vertical and horizontal directions increases as you move from the intermediate part in the vertical direction toward the lower end. The second opening 80 is mostly composed of holes 107A. In the following, when referring to holes 107A, 107B, and 107C collectively, they shall be referred to as hole 107.

[0106] The opening area of ​​the multiple holes 107A arranged as described above is set to increase as you move from the middle of the back surface 91 in the vertical direction toward the lower end.

[0107] Here, the back portion 91 has a hole 107D that has an extremely large opening area compared to holes 107A, 107B, and 107C, and functions as a peephole, for example, and a keyhole-shaped hole 107E attached to hole 107D. However, these holes 107D and 107E are excluded from the openings in the present invention.

[0108] <Area of ​​the second opening> The area of ​​the second opening 80 formed by the collection of holes 107 is preferably set to 10-50% of the total area of ​​the back surface 91, and more preferably to 10-30%.

[0109] As described above, by setting the area of ​​the second opening 80 to within 10-50% of the total area of ​​the back surface 91, the amount of air taken in and released through the second opening 80 becomes appropriate, allowing the efficacy of the chemical to be properly exerted while avoiding excessive volatilization of the chemical, and enabling the chemical volatilization performance of the chemical volatilizer 63 to be maintained over a long period of time. If the area of ​​the second opening 80 is less than 10% of the total area of ​​the back surface 91, there is a risk that the efficacy of the chemical will not be fully exerted. If the area of ​​the second opening 80 is greater than 50% of the total area of ​​the back surface 91, there is a risk that the chemical volatilization performance of the chemical volatilizer 63 cannot be maintained over a long period of time due to excessive volatilization of the chemical.

[0110] <Percentage of hole area on the back surface> Here, the entire rear view area of ​​the rear portion 91 is divided into three equal parts vertically, defining the upper end region 203A, the lower end region 203B, and the intermediate region 203C between these end regions. In this case, it is preferable that the ratio of the opening area of ​​any one of the multiple holes 107 provided in the intermediate region 203C to the opening area of ​​any one of the multiple holes 107 provided in the upper end region 203A and the lower end region 203B (which is essentially the opening area of ​​the multiple holes 107 provided in the lower end region, excluding the opening areas of holes 107D and 107E) is set to 6:1 to 6:36.

[0111] As described above, by setting the opening area ratio of the holes 107 to the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the second opening 80 in the upper and lower middle region to the lower end region of the back portion 91 can be kept within a predetermined allowable range, and the amount of chemical contained in the chemical volatilizer 63 can be prevented from being excessively reduced in the upper and lower directions. If the opening area ratio of the holes 107 falls outside the range of 6:1 to 6:36, the bias in the amount of air taken in and released through the second opening 80 will exceed the predetermined allowable range and become excessive, which may cause the amount of chemical contained in the chemical volatilizer 63 to be excessively reduced in the upper and lower directions.

[0112] <Maximum and minimum area ratio of holes on the back surface> In the rear portion 91, it is preferable that the ratio of the minimum opening area to the maximum opening area of ​​the multiple holes 107 is set to 3:5 to 3:80.

[0113] As described above, by setting the maximum-to-minimum area ratio of the holes 107 to the range of 3:5 to 3:80, the throttling effect, which increases the flow velocity by restricting the airflow at the holes 107, results in an appropriate ratio between the amount of drug volatilized over long distances at a relatively high flow velocity and the amount of drug volatilized over short distances at a relatively low flow velocity, allowing the drug's efficacy to work properly. If the maximum-to-minimum area ratio of the holes 107 falls outside the range of 3:5 to 3:80, the balance between the amount of drug volatilized over long distances and the amount volatilized over short distances will be poor, and there is a risk that the drug's efficacy will not work properly.

[0114] <Shortest distance between adjacent holes> The shortest distance between the opening edge of one of the multiple holes 107 and the opening edge of another hole 107 adjacent to that hole 107, i.e., in the example shown in Figure 10, the distance (L 41 ) is the diameter of one hole 107 (Diameter D 40 It is preferable to set it to 1 / 6 (approximately 0.2) or more of the size of ).

[0115] As described above, the shortest distance between adjacent holes 107 (L 41 ) is the diameter of one hole 107 (Diameter D 40 By setting the size to 1 / 6 or more of the size of the hole, adjacent holes 107 are arranged at a distance that allows them to function as independent holes, thereby suppressing mutual interference of air blown into the interior of the containment container 65 through one hole 107 and the other hole 107, and also suppressing mutual interference of air released to the outside of the containment container 65 through one hole 107 and the other hole 107, thereby enabling smooth air intake and release.

[0116] <Overlapping area ratio between the first and second openings> Figure 11 shows the overlapping region of the first opening 70 and the second opening 80 when the front section 81 is superimposed on the back section 91. As shown in Figure 11, when the front section 81 and the back section 91 are superimposed and viewed from the front, there is a region where the holes 105 constituting the first opening 70 and the holes 107 constituting the second opening 80 overlap (the area with shaded hatching in Figure 11), and a region where the holes 105 and 107 do not overlap. It is preferable that the area of ​​the region where the holes 105 and 107 overlap is set to 20-80% of the area of ​​the holes 105 constituting the first opening 70.

[0117] Figure 12 shows the overlapping region of the first opening 70 and the second opening 80 when the rear section 91 is superimposed on the front section 81. As shown in Figure 12, when the front section 81 and the rear section 91 are superimposed and viewed from the rear side, there is a region where the holes 105 constituting the first opening 70 and the holes 107 constituting the second opening 80 overlap (the area with shaded hatching in Figure 12), and a region where the holes 105 and 107 do not overlap. It is preferable that the area of ​​the region where the holes 105 and 107 overlap is set to 20-80% of the area of ​​the holes 107 constituting the second opening 80 (opening area).

[0118] <Ratio of contactable surface area with the containment container to the total surface area of ​​the volatile substance> Figure 13 is a longitudinal cross-sectional view of the pesticide volatilization device 1B. In Figure 13, the surface area of ​​the surface 63a of the pesticide volatilizer 63 facing the front portion 81 is 2000 to 15000 mm². 2 It is set to preferably 2000-12000mm 2 It is set to a comfortable 2000~10000mm 2 The surface area of ​​the surface 63b on the side of the drug volatilizer 63 facing the back portion 91 is set to 2000 to 15000 mm². 2 It is set to preferably 2000-12000mm 2 It is set to a comfortable 2000~10000mm 2This is set to ensure a surface area that can effectively volatilize the drug. Furthermore, in Figure 13, when the surface 81a on the front portion 81 facing the drug volatilizer 63 is considered to be a plane that can contact the drug volatilizer 63 and does not have the first opening 70, it is preferable that the overlapping area when the surface 63a on the side of the drug volatilizer 63 facing the aforementioned plane is projected onto the aforementioned plane is set to 15% or less of the total surface area of ​​the drug volatilizer 63. Note that the surface area of ​​the surface 63a (63b) on the side of the drug volatilizer 63 facing the front portion 81 (back portion 91) is the area of ​​surface 63a (63b) only, and does not include the surface area including the depth portion of the three-dimensional structure (the column structure portion 63c between surface 63a and surface 63b). Also, the surface 63a on the side of the drug volatilizer 63 facing the aforementioned plane is the surface of surface 63a only, and does not include the surface of the column structure portion 63c.

[0119] As described above, when the ratio of the contactable area of ​​the containment container 65 to the total surface area of ​​the volatile agent 63 is set to 15% or less, since the holes 105 that constitute the first opening 70 are actually provided in the front portion 81, the actual contactable area can be reliably kept smaller than 15% of the total surface area of ​​the volatile agent 63. In this way, by minimizing the portion of the volatile agent 63 that can come into contact with the front portion 81, obstruction of the volatilization of the agent can be avoided, and contamination of the containment container 65 can be prevented.

[0120] As shown in Figures 8(a) and (b) and (d) and (e), the side portion 121 of the containment container 65 has a third opening 30. It also has a third opening 90. The third opening 90 is formed by a collection of multiple elongated, rounded rectangular holes 109 in the vertical or horizontal direction. The multiple holes 109 are formed by cutting out the edges to the required extent in the upper portions 83, 93, lower portions 85, 95 and each side portion 87, 97 of the front container portion 71 and the rear container portion 73. Thus, in addition to the intake and release of air through the holes 105 constituting the first opening 70 and the holes 107 constituting the second opening 80, air is also taken in and released through the holes 109 constituting the third opening 90, allowing the chemical to be dispersed over a wider area.

[0121] As shown in Figures 8(a) and (b), the hook portion 67 is a ring-shaped molded product and is configured to be switchable between a state in which it stands up on the top of the storage container 65 and a state in which it is folded to the back side of the storage container 65 and stored in a hook storage portion 110 formed on the back portion 91 (not shown).

[0122] As described above, the chemical volatilization device 1B, with the chemical volatilizer 63 built into the containment container 65, is used by hanging it from, for example, a clothesline on a balcony using the hook portion 67, as shown in Figures 8(a) and (b). Then, for example, the chemical is impregnated into the air blown into the containment container 65 through the first opening 70 or the second opening 80, and the air containing the chemical is released and volatilized through the second opening 80 and the third opening 90, or the first opening 70 and the third opening 90, thereby exterminating or repelling flying insects such as mosquitoes, midges, and drain flies that try to enter through the balcony window.

[0123] In the second embodiment of the chemical volatilization device, as shown in Figures 11 and 12, when the front portion 81 and the back portion 91 are superimposed, there is an area where the holes 105 and 107 overlap, and an area where the holes 105 and 107 do not overlap. The area of ​​the overlapping area (shown by shaded hatching in Figures 11 and 12) is configured to be 20-80% of the area of ​​the first opening 70 or the second opening 80. With this configuration, the air blown into the containment container 65 from the first opening 70 or the second opening 80 by the airflow is less likely to escape to the outside of the containment container 65 through the second opening 80 or the first opening 70. This creates a turbulent airflow inside the containment container 65, mixing the chemical from the chemical volatilizer 63 with the air. As a result, the air blown into the containment container 65 can be sufficiently impregnated with the chemical, and the air containing the chemical can be released to the outside of the containment container 65. Therefore, the pesticide can be effectively dispersed, and flying insects can be effectively exterminated or repelled.

[0124] Furthermore, in the second embodiment of the drug volatilization device 1B, when the air blown into the container 65 from the second opening 80 by the airflow is mixed with the drug from the drug volatilizer 63 and then passes through the multiple holes 105 forming the first opening 70, the throttling effect that increases the flow velocity by narrowing the airflow at the holes 105 is achieved because the opening area of ​​the multiple holes 105, arranged as shown in Figure 9, is set to increase as it moves in the direction of rotation of the virtual spiral 100. As a result, the opening area increases as it approaches the center of the front section 81 and decreases as it moves away from the center in the direction of rotation of the virtual spiral 100. Therefore, drug-containing air is released from the center of the front section 81 at a relatively high flow velocity, and the flow velocity of the released drug-containing air decreases as it moves away from the center of the front section 81 in the direction of rotation of the virtual spiral 100. As a result, the drug can be released from the front section 81 on a directional spiral airflow, allowing the drug to be volatilized over a greater distance.

[0125] Although the drug volatilization device of the present invention has been described above based on several embodiments, the present invention is not limited to the configurations described in the above embodiments, and its configuration can be modified as appropriate without departing from the spirit of the invention, such as by appropriately combining the configurations described in each embodiment. [Industrial applicability]

[0126] The pesticide volatilization device of the present invention is particularly effective in applications for controlling or repelling flying insects such as mosquitoes, midges, and drain flies. [Explanation of symbols]

[0127] 1A, 1B Chemical volatilization device 3. Volatile pesticide 5. Containment container 10 First opening 11 Front side container section (one side container section) 13. Rear side container section (other side container section) 20 Second opening 21 Front section (first surface section) 30 Third opening 31 Back part (second side part) 45 Hole 47 Hole 49 Hole 51 Protrusion 53 Information Department 61 Side part (third side part) 63. Volatile substances of pharmaceuticals 65 containers 70 First opening 71 Front side container section (one side container section) 73 Rear side container section (other side container section) 80 Second opening 81 Front part (first side part) 90 Third opening 91 Back part (second side part) 100 virtual spirals 105 Hole 107 Hole 109 Hole 121 Side part (third side part)

Claims

1. A drug volatilizer that holds volatile drugs in a volatilizable state, A container for containing the aforementioned volatile chemical substance in a breathable manner, A drug volatilization device equipped with, The aforementioned container is A first surface portion having a first opening formed by a collection of multiple holes, A second surface portion having a second opening formed by a collection of multiple holes, Equipped with, The first surface portion and the second surface portion are arranged facing each other, When viewed from the first surface or the second surface, there is a region where the first opening and the second opening overlap, and a region where the first opening and the second opening do not overlap. The area of ​​the overlapping region is set to be 20 to 80% of the area of ​​the hole constituting the first opening or the area of ​​the hole constituting the second opening. The surface area of ​​the side of the volatile chemical material facing the first surface or the second surface is 1,000 to 15,000 mm². ２ It is set to, A drug volatilization device configured such that air blown into the containment container from the first or second opening becomes turbulent inside the containment container and is mixed with the volatile drug volatilized from the drug volatilizer.

2. A drug volatilizer that holds volatile drugs in a volatilizable state, A container for containing the aforementioned volatile chemical substance in a breathable manner, A drug volatilization device equipped with, The aforementioned container is A first surface portion having a first opening formed by a collection of multiple holes, A second surface portion having a second opening formed by a collection of multiple holes, Equipped with, The first surface portion and the second surface portion are arranged facing each other, When viewed from the first surface or the second surface, there is a region where the first opening and the second opening overlap, and a region where the first opening and the second opening do not overlap. The area of ​​the overlapping region is set to be 20 to 80% of the area of ​​the hole constituting the first opening or the area of ​​the hole constituting the second opening. When the surface of the first or second surface facing the volatile agent is considered to be a plane that can come into contact with the volatile agent and does not have the first or second opening, the overlapping area when the surface of the volatile agent facing the plane is projected onto the plane is set to 15% or less of the total surface area of ​​the volatile agent. A drug volatilization device configured such that air blown into the containment container from the first or second opening becomes turbulent inside the containment container and is mixed with the volatile drug volatilized from the drug volatilizer.

3. The drug volatilization apparatus according to claim 1 or 2, wherein the area of ​​the first opening and the second opening are set to 10 to 50% of the total area of ​​the first surface and the second surface, respectively.

4. The first surface portion is formed in a convex curved shape with an intermediate portion between both ends that protrudes outward from the container. The holes in the first surface are arranged from both ends to the middle portion of the first surface, The drug volatilization device according to any one of claims 1 to 3, wherein the opening area of ​​the holes arranged is set to increase as it progresses from the intermediate portion toward both ends.

5. The holes are located on a virtual spiral line virtually drawn on the first surface, which moves away from the center as it progresses in the direction of rotation, and are positioned from both ends of the first surface to the intermediate portion between those ends. The chemical volatilization device according to any one of claims 1 to 3, wherein the opening area of ​​the holes arranged is set to increase as it moves in the rotational direction.

6. The drug volatilization device according to any one of claims 1 to 5, wherein the ratio of the minimum opening area to the maximum opening area of ​​the hole is set to 3:5 to 3:

80.

7. The aforementioned hole is circular in shape or includes an arc. The drug volatilization device according to any one of claims 1 to 6, wherein the shortest distance between the opening edge of one of the holes and the opening edge of another hole adjacent to that hole is set to be 1 / 6 or more of the diameter of the one hole.

8. The aforementioned container further comprises a third surface having a third opening, The drug volatilization apparatus according to any one of claims 1 to 7, wherein the third surface extends between the first surface and the second surface in a direction intersecting the first surface and the second surface.

9. The aforementioned container is constructed by detachably fitting together one side container portion including the first surface portion and the other side container portion including the second surface portion. The container portion on one side has a projection that protrudes inward from the container. The other side container portion is formed with a pair of guide portions that can engage with both side edges of the protruding portion. The drug volatilization device according to any one of claims 1 to 8, wherein when the one-sided container portion and the other-sided container portion, which are in a separated state, are fitted together, the protruding portion is guided by the guide portion.

10. The volatile agent has a vapor pressure of 2 × 10 at 30°C. －４ ~1 x 10 －２ A drug volatilization apparatus according to any one of claims 1 to 9, wherein the pyrethroid compound is mmHg.

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