Drug diffuser

Abstract

To obtain a diffusion effect of a chemical exceeding a natural wind speed when the chemical is diffused by utilizing the natural wind.SOLUTION: A chemical diffuser 1 includes a chemical retainer 10 retaining a volatile chemical and configured to be ventilated, and a retaining member 20 retaining the chemical retainer 10. The holding member 20 has a turbulent flow generation structure 61 that receives wind blowing from the upstream side in the ventilation direction and generates a turbulent flow on the downstream side of the chemical agent retainer 10 by the received wind.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a chemical diffuser that diffuses various chemicals into the air. [Background technology]

[0002] For example, Patent Documents 1 to 3 disclose insecticide diffusers that are made by housing an impregnated body impregnated with an insect repellent chemical in a container. These types of insecticide diffusers are installed outdoors and repel pests such as mosquitoes by absorbing the natural wind and dispersing the chemical into the surrounding area.

[0003] Patent Documents 1 to 3 describe providing a fin-like structure so that natural wind can be efficiently received. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-112288 [Patent Document 2] Japanese Patent Publication No. 2022-109660 [Patent Document 3] Japanese Patent Application Publication No. 2023-101267 Summary of the Invention [Problem to be solved by the invention]

[0005] The chemical diffusers of Patent Documents 1 to 3 have the advantage of using natural wind to diffuse chemicals, eliminating the need for electricity and making the structure extremely simple. However, no matter how efficiently the fin-shaped structure is set up to catch the wind, there is a limitation that the diffusion effect cannot exceed the natural wind speed at that time. The same applies when diffusing chemicals other than insect repellents.

[0006] The present disclosure has been made in consideration of such points, and its purpose is to achieve a drug diffusion effect that exceeds the natural wind speed when using natural wind to diffuse the drug. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the present disclosure can be premised on a chemical diffuser for diffusing various chemicals. The chemical diffuser includes a chemical holder configured to hold a volatile chemical and to be ventilated, and a holding member for holding the chemical holder. The holding member has a turbulence generating structure that receives wind blowing from the upstream side in the ventilation direction and generates turbulence downstream of the chemical holder by the received wind.

[0008] According to this configuration, when the chemical diffuser is installed outdoors, for example, the chemical holder and the holding member are exposed to natural wind. When the turbulence-generating structure of the holding member is exposed to natural wind, the received wind generates turbulence downstream of the chemical holder. When turbulence occurs downstream of the chemical holder, negative pressure is generated downstream of the chemical holder, causing air to be drawn from the upstream side of the chemical holder to the downstream side, thereby increasing the wind speed passing through the chemical holder. This increases the amount of chemical emitted.

[0009] The holding member may have a frame that holds the outer edge of the drug support. When the holding member has a frame, the turbulence generating structure may have a plate-like portion that protrudes outward from the frame. By using this plate-like portion, turbulence can be generated by utilizing the wind flowing around the drug support.

[0010] The holding member may be symmetrical when viewed from the direction of airflow, and asymmetrical when viewed from the side with the center of symmetry in the direction of airflow. By installing this holding member so that it can rotate around a vertical axis, the holding member rotates so that it takes a constant attitude toward the upwind side, allowing the agent to be dispersed stably regardless of the wind direction.

[0011] The holding member may have vertical sides extending vertically and horizontal sides extending horizontally when viewed from the direction of ventilation. The vertical dimension of the vertical sides can be set longer than the horizontal dimension of the horizontal sides, and in this case, the plate-shaped portion of the turbulence generating structure can be provided continuously in the vertical direction of the vertical sides. In other words, by providing the turbulence generating structure continuously on the vertical sides that are longer than the horizontal sides, the range in which the turbulence generating structure is provided is widened, making it easier for turbulence to be generated downstream of the drug holder.

[0012] The vertical side portions may be plate-shaped and extend vertically and in the direction of ventilation. In this case, the plate-shaped portion of the turbulence generating structure can be integrally molded with the vertical side portions downstream in the direction of ventilation. This allows air flowing along the vertical side portions to flow from the downstream side toward the plate-shaped portion of the turbulence generating structure. Furthermore, since the vertical side portions extend in the direction of ventilation and the plate-shaped portion protrudes outward from the frame body, the extension directions of the two portions intersect. By integrally molding these portions whose extension directions intersect, the rigidity of the frame body is improved.

[0013] The plate-shaped portion of the turbulence generating structure can be shaped so that the direction of protrusion from the frame is perpendicular to the direction of airflow, causing the air received by the turbulence generating structure to flow downstream and be guided to the outside of the frame, whereupon it separates from the turbulence generating structure at its tip, generating turbulence downstream of the drug holder.

[0014] The plate-shaped portion of the turbulence generating structure can be positioned downstream of the chemical carrier in the direction of airflow, thereby positioning the turbulent flow area downstream of the chemical carrier, thereby ensuring the generation of negative pressure downstream of the chemical carrier. [Effects of the Invention]

[0015] As explained above, natural wind can be used to generate turbulence downstream of the chemical carrier, so that a chemical diffusion effect exceeding the natural wind speed can be obtained. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of a chemical diffuser according to an embodiment of the present invention, seen from the upstream side in the direction of airflow. [Figure 2] FIG. 2 is a perspective view of the chemical diffuser as seen from the downstream side in the direction of ventilation. [Figure 3] FIG. 3 is a front view of the drug diffuser. [Figure 4] FIG. 4 is a side view of the drug diffuser. [Figure 5] FIG. 5 is a plan view of the drug diffuser. [Figure 6] FIG. 6 is a perspective view of the disassembled chemical diffuser as seen from the upstream side. [Figure 7] FIG. 7 is a perspective view of the disassembled chemical diffuser as seen from the downstream side. [Figure 8] FIG. 8 is a plan view showing the medicine diffuser in an exploded state. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a diagram illustrating how the direction of the chemical diffuser changes depending on the wind direction. [Figure 12] FIG. 12 is a graph showing the difference in air velocity passing through the chemical carriers of the present invention and the comparative example. [Figure 13] FIG. 13 is a diagram illustrating the details of the turbulence generating structure. [Figure 14] FIG. 14 is a diagram showing the state of air flow in the present invention and the comparative example, determined by particle image velocimetry. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0018] 1 to 5 show a chemical diffuser 1 according to an embodiment of the present invention. The chemical diffuser 1 includes a chemical holder 10 configured to hold a volatile chemical and to allow ventilation, and a holding member 20 that holds the chemical holder 10. The chemical diffuser 1 can be used outdoors or indoors. As shown in FIGS. 1 to 4, the chemical diffuser 1 may include a hanging member 2 for suspending the holding member 20. The hanging member 2 is made of a flexible member such as a string, thread, rope, or cord, and is used to install the holding member 20 so that it can rotate around a vertical axis, as will be described later. The hanging member 2 may be made of a hard member, and a rotation mechanism (not shown) that allows the holding member 20 to rotate around the vertical axis may be provided between the hanging member 2 and the holding member 20.

[0019] The hanging member 2 is detachably provided with respect to the holding member 20. A hook (not shown) or the like may be provided at the upper end of the hanging member 2. If a hook is provided, the chemical diffuser 1 can be used by hanging the hook on an outdoor clothesline or the like. The chemical diffuser 1 may also be installed in a fixed state so that the holding member 20 does not rotate.

[0020] In the description of this embodiment, the front side of the chemical diffuser 1 in use can be referred to as the front side, and the back side as the rear side. However, since the holding member 20 in this embodiment rotates around a vertical axis, the upstream side and downstream side are defined as shown in each figure, based on the ventilation direction indicated by the white arrow in FIG. 5. When viewing the chemical diffuser 1 in use from the upstream side in the ventilation direction, the left side is the left side of the chemical diffuser 1, and the right side is the right side of the chemical diffuser 1. Therefore, the width direction of the chemical diffuser 1 is the left-right direction perpendicular to the ventilation direction. This definition of direction is provided merely for convenience of description, and either side may be the right or left in actual use.

[0021] (Configuration of drug carrier 10) As shown in FIGS. 6 and 7, the drug carrier 10 can be made of, for example, a fabric material such as a nonwoven fabric, a mesh material, a sponge material, or a sheet-like or film-like material having a plurality of ventilation holes, and has breathability that allows natural wind to pass through in the thickness direction (front-to-back direction). The drug carrier 10 may have, for example, a flat shape, or a shape folded to form pleats. The outer shape of the drug carrier 10 may be a polygonal shape such as a rectangle or a triangle, or may be a circular or elliptical shape. Multiple drug carriers 10 can be accommodated in one holding member 20. In this case, the multiple drug carriers 10 may be accommodated stacked in the thickness direction, or may be accommodated side by side in the vertical or horizontal directions of the holding member 20.

[0022] In this embodiment, the drug support 10 has a mesh-like shape and is thin in the direction of airflow. In the case of the drug support 10 that is folded to form pleats, the direction in which the peaks and valleys of the pleats continue can be the left-right direction (width direction) of the holding member 20. The drug support 10 is impregnated with a drug that has the property of gradually volatilizing at room temperature (room-temperature volatility).

[0023] "Room-temperature volatile" refers to the property of volatilizing into the air at room temperature (e.g., 25°C), and examples thereof include chemicals with a vapor pressure of 0.001 Pa or greater at 25°C. The type of chemical is not particularly limited, and examples include insect repellents, insecticides, deodorants, disinfectants, air fresheners, and antiviral agents (virus inactivators). One of these may be used alone, or two or more may be used in combination. Specific examples of insecticides made from pyrethroid compounds include transfluthrin, metofluthrin, profluthrin, and empenthrin. These pyrethroid compounds exist as various optical isomers or geometric isomers, and any of these isomers may be used. These compounds may be used singly or in combination of two or more. A mixture of multiple types of the above chemicals may also be used.

[0024] The agent may contain a solvent that dissolves the insecticidal component or insect repellent component. The agent may also contain a synergist. The agent may also contain an antibacterial agent such as hinokitiol, tetrahydrolinalool, eugenol, citronellal, or allyl isothiocyanate. The agent may also contain an antifungal agent such as isopropylmethylphenol or orthophenylphenol. The agent may also contain a fragrance or deodorizer such as citronella oil, orange oil, lemon oil, lime oil, yuzu oil, lavender oil, peppermint oil, eucalyptus oil, jasmine oil, hiba oil, cypress oil, bamboo extract, mugwort extract, tung oil, green tea essential oil, or limonene.

[0025] The chemical can be impregnated into the chemical support 10. The amount of chemical released can be set to approximately 0.01 to 3.0 mg per hour when the temperature is 25°C and the flow rate of air blown onto the chemical support 10 is 0.1 to 0.5 m / sec, but this is just an example and the amount can be outside this range. The amount of chemical released can be changed by the type of solvent, the structure, size, surface area, material constituting the chemical support 10, basis weight, etc.

[0026] The drug can also be attached by coating or spraying onto the drug carrier 10, which also allows the drug to be held by the drug carrier 10. The drug can also be held by the drug carrier 10 by kneading the drug into the material that constitutes the drug carrier 10. Any method may be used to hold the drug on the drug carrier 10.

[0027] (Structure of holding member 20) As shown in Fig. 3, the holding member 20 is a thick plate that is symmetrical when viewed from the airflow direction, with a line that passes through the center of the left-right direction and extends vertically as the center of symmetry, and can also be said to have an axisymmetric shape. As shown in Fig. 4, the holding member 20 is asymmetrical when viewed from the side, with a line that passes through the center of the airflow direction and extends vertically as the center of symmetry.

[0028] The holding member 20 has a frame 30 that holds the outer edge of the drug holder 10. The frame 30 has a first vertical side portion 31 and a second vertical side portion 32 that extend vertically when viewed from the ventilation direction, and an upper horizontal side portion 33 and a lower horizontal side portion 34 that extend horizontally. The first vertical side portion 31 is a portion that constitutes one side of the frame 30, and the second vertical side portion 32 is a portion that constitutes the other side of the frame 30. In this embodiment, the first vertical side portion 31 and the second vertical side portion 32 are parallel to each other. The upper horizontal side portion 33 is a portion that constitutes the upper side of the frame 30, and the lower horizontal side portion 34 is a portion that constitutes the lower side of the frame 30. In this embodiment, the upper horizontal side portion 33 and the lower horizontal side portion 34 are parallel to each other.

[0029] The upper end of the first vertical side portion 31 is connected to one end of the upper horizontal side portion 33, and the other end of the upper horizontal side portion 33 is connected to the upper end of the second vertical side portion 32. The lower end of the first vertical side portion 31 is connected to one end of the lower horizontal side portion 34, and the other end of the lower horizontal side portion 34 is connected to the lower end of the second vertical side portion 32. Therefore, the first vertical side portion 31 and the second vertical side portion 32, and the upper horizontal side portion 33 and the lower horizontal side portion 34 form a frame body 30 having a shape close to a rectangle corresponding to the outer shape of the drug holder 10. The shape of the frame body 30 may be a polygon other than a rectangle, or may be a circle or an ellipse.

[0030] The vertical dimensions of the first vertical side portion 31 and the second vertical side portion 32 are set longer than the left-right dimensions of the upper horizontal side portion 33 and the lower horizontal side portion 34. This gives the frame 30 a shape that is long in the vertical direction. Note that the vertical dimensions of the first vertical side portion 31 and the second vertical side portion 32 and the left-right dimensions of the upper horizontal side portion 33 and the lower horizontal side portion 34 may be set to be the same. Furthermore, the vertical dimensions of the first vertical side portion 31 and the second vertical side portion 32 may be set shorter than the left-right dimensions of the upper horizontal side portion 33 and the lower horizontal side portion 34.

[0031] The first vertical side portion 31 and the second vertical side portion 32 are plate-shaped and extend in the ventilation direction. The upper horizontal side portion 33 and the lower horizontal side portion 34 are also plate-shaped and extend in the ventilation direction. This allows the dimension of the frame body 30 in the ventilation direction (dimension in the thickness direction) to be at least a predetermined value, so that the drug holder 10 can be held in the middle of the frame body 30 in the ventilation direction.

[0032] As shown in FIGS. 6 to 8, the frame 30 is configured to be separable in the ventilation direction and is composed of an upstream member 40 and a downstream member 50. The upstream member 40 and the downstream member 50 are each frame-shaped and made of a hard resin material or the like, and are integrated by being combined with each other. The upstream member 40 and the downstream member 50 may be made of, for example, metal, paper, or wood. When holding the drug carrier 10, the outer edge of the drug carrier 10 may be sandwiched between the upstream member 40 and the downstream member 50 in the thickness direction. Alternatively, the central portion of the drug carrier 10 may be sandwiched between the upstream member 40 and the downstream member 50 in the thickness direction.

[0033] As shown in Figure 9, by forming claw portions 50a on the downstream member 50 and forming locking holes 40a on the upstream member 40, and by inserting the claw portions 50a into the locking holes 40a and locking them together when the upstream member 40 and the downstream member 50 are combined, it is possible to prevent the upstream member 40 and the downstream member 50 from separating during use. A plurality of claw portions 50a and locking holes 40a can be provided at intervals in the circumferential direction of the frame 30. When integrating the upstream member 40 and the downstream member 50, in addition to the locking structure using the claw portions 50a and the locking holes 40a, an integration structure using a fitting structure, adhesive, or welding may also be used.

[0034] As shown in FIGS. 6 to 8 , the upstream member 40 has a first vertical side portion 31, a second vertical side portion 32, an upper horizontal side portion 33, and a lower horizontal side portion 34. An upstream rib portion 45 is provided in the portion of the upstream member 40 surrounded by the first vertical side portion 31, the second vertical side portion 32, the upper horizontal side portion 33, and the lower horizontal side portion 34. The upstream rib portion 45 is integrally molded with the first vertical side portion 31, the second vertical side portion 32, the upper horizontal side portion 33, and the lower horizontal side portion 34, and thus can connect the first vertical side portion 31, the second vertical side portion 32, the upper horizontal side portion 33, and the lower horizontal side portion 34 to one another via the upstream rib portion 45. This improves the rigidity of the upstream member 40. The shape, thickness, pitch, etc. of the upstream rib portion 45 can be set as desired, taking into consideration the strength of the upstream member 40 and ease of ventilation. The shape of the upstream rib portion 45 is not limited to the shape shown in the drawing, and may be, for example, a shape extending vertically and horizontally. A plurality of upstream openings 45a are formed by the upstream rib portion 45. The upstream openings 45a serve as inlets for allowing air to flow into the holding member 20.

[0035] Meanwhile, the downstream member 50 has a first inner portion 51 arranged along the inner surface of the first vertical side portion 31, a second inner portion 52 arranged along the inner surface of the second vertical side portion 32, an upper portion 53 arranged along the inner surface of the upper horizontal side portion 33, and a lower portion 54 arranged along the inner surface of the lower horizontal side portion 34. A downstream rib portion 55 is provided in the downstream member 50 in a portion surrounded by the first inner portion 51, the second inner portion 52, the upper portion 53, and the lower portion 54. The shape of the downstream rib portion 55 is not limited to the shape shown in the figure and may be, for example, a shape extending vertically and horizontally. The downstream rib portion 55 forms multiple downstream openings 55a. The downstream openings 55a serve as air outlets for discharging air that has flowed into the holding member 20. The shapes and numbers of the upstream openings 45a and the downstream openings 55a can be set as desired.

[0036] The holding member 20 has a first turbulence generating structure 61 and a second turbulence generating structure 62 that receive wind blowing from the upstream side in the ventilation direction and generate turbulence by the received wind on the downstream side of the drug holder 10. Only one of the first turbulence generating structure 61 and the second turbulence generating structure 62 may be provided.

[0037] 9, for example, the first turbulence generating structure 61 is composed of the first vertical side 31 of the frame body 30 and a first plate-like portion 61a integrally molded with the first vertical side 31 on the downstream side in the airflow direction. The first plate-like portion 61a of the first turbulence generating structure 61 protrudes from the downstream side in the airflow direction of the first vertical side 31 toward the outside of the frame body 30 and is provided continuously in the up-down direction from the top to the bottom of the first vertical side 31. Because the protruding direction of the first plate-like portion 61a differs from the extending direction of the first vertical side 31, the formation of the first plate-like portion 61a makes it possible to reinforce the first vertical side 31.

[0038] Since the first plate-shaped portion 61a protrudes from the downstream portion of the first vertical side portion 31 in the ventilation direction toward the outside of the frame body 30, the first plate-shaped portion 61a is positioned downstream in the ventilation direction of the drug holder 10. The first plate-shaped portion 61a may be provided discontinuously in the vertical direction. Alternatively, the first plate-shaped portion 61a may be provided only in the vertical middle portion of the first vertical side portion 31.

[0039] The first plate-shaped portion 61a has a plate-like shape such that the protruding direction from the first vertical side portion 31 is perpendicular to the ventilation direction. That is, the first plate-shaped portion 61a protrudes laterally from the first vertical side portion 31. The first plate-shaped portion 61a may be inclined with respect to the ventilation direction so that the tip of the first plate-shaped portion 61a in the protruding direction from the first vertical side portion 31 is positioned more downstream in the ventilation direction. The first plate-shaped portion 61a may also be curved so that the tip of the first plate-shaped portion 61a in the protruding direction from the first vertical side portion 31 is positioned more downstream in the ventilation direction.

[0040] The second turbulence generating structure 62 is composed of the second vertical side 32 of the frame 30 and a second plate-shaped portion 62a integrally molded on the downstream side in the airflow direction of the second vertical side 32. Therefore, the drug holder 10 is arranged between the first turbulence generating structure 61 and the second turbulence generating structure 62, and the first turbulence generating structure 61 and the second turbulence generating structure 62 are provided at positions sandwiching the drug holder 10 in the width direction. In other words, the first turbulence generating structure 61 and the second turbulence generating structure 62 are provided on both sides of the drug holder 10.

[0041] The second plate-shaped portion 62a protrudes from the downstream portion of the second vertical side portion 32 in the airflow direction toward the outside of the frame body 30, and is provided continuously in the vertical direction from the upper part to the lower part of the second vertical side portion 32. Since the second plate-shaped portion 62a protrudes from the downstream portion of the second vertical side portion 32 in the airflow direction toward the outside of the frame body 30, the second plate-shaped portion 62a is positioned downstream in the airflow direction relative to the drug holder 10. The second plate-shaped portion 62a may be provided discontinuously in the vertical direction. Alternatively, the second plate-shaped portion 62a may be provided only in the middle portion of the second vertical side portion 32 in the vertical direction.

[0042] The second plate-shaped portion 62a has a plate-like shape and protrudes from the second vertical side portion 32 perpendicular to the ventilation direction. That is, the second plate-shaped portion 62a protrudes laterally from the second vertical side portion 32. The second plate-shaped portion 62a may be inclined with respect to the ventilation direction so that the tip of the second plate-shaped portion 62a in the protruding direction from the second vertical side portion 32 is positioned more downstream in the ventilation direction. The second plate-shaped portion 62a may also be curved so that the tip of the second plate-shaped portion 62a in the protruding direction from the second vertical side portion 32 is positioned more downstream in the ventilation direction.

[0043] In this embodiment, the first plate-shaped portion 61a is provided on the upstream member 40, and the second plate-shaped portion 62a is provided on the downstream member 50. This allows the amount of resin used in the upstream member 40 and the amount of resin used in the downstream member 50 to be approximately the same, compared to when both the first plate-shaped portion 61a and the second plate-shaped portion 62a are provided on one member. This allows the upstream member 40 and the downstream member 50 to be injection molded using the same resin filling pressure and filling time, improving the productivity of the upstream member 40 and the downstream member 50.

[0044] (When using drug diffuser 1) FIG. 11 is a diagram illustrating how the orientation of the chemical diffuser 1 changes depending on the wind direction. The white arrow A in FIG. 11 indicates the direction of the wind blowing toward the chemical diffuser 1. When wind blows from the direction of arrow A, the first plate-shaped portion 61a of the first turbulence generating structure 61 and the second plate-shaped portion 62a of the second turbulence generating structure 62 receive the wind. However, the first plate-shaped portion 61a receives the wind in the direction of arrow A more strongly than the second plate-shaped portion 62a. Therefore, a force acts on the chemical diffuser 1 to rotate it in the direction of arrow B. As a result, the chemical diffuser 1 rotates around the vertical axis until the direction of arrow A and the holding member 20 are substantially perpendicular to each other, as shown by the imaginary line. Furthermore, when wind blows from the direction of arrow C, the second plate-shaped portion 62a receives the wind more strongly than the first plate-shaped portion 61a. Therefore, a force is applied to the chemical diffuser 1 to rotate it in the direction of arrow D, and as a result, although not shown, the chemical diffuser 1 rotates around the vertical axis until it assumes a positional relationship in which the direction of arrow C and the holding member 20 are substantially perpendicular to each other. In this way, the direction of the chemical diffuser 1 changes according to the wind direction, and the upstream opening 45a of the holding member 20 faces the wind direction. This makes it easier for the wind to enter the upstream opening 45a.

[0045] 12 is a graph showing the difference in airflow speed through the chemical holder of the present invention and a comparative example. The present invention is a chemical diffuser 1 equipped with a holding member 20 having a first turbulence generating structure 61 and a second turbulence generating structure 62. The comparative example is a chemical diffuser (not shown) equipped with a holding member that does not have the first turbulence generating structure 61 and the second turbulence generating structure 62.

[0046] During the test, an electric fan was used to blow air through the present invention and the comparative example. The air velocity from the fan was set to a range of 0.6 to 3.2 m / s (see the horizontal axis) just before flowing into the substantive support 10, i.e., near the front surface of the holding member 20, and was gradually increased from 0.6 m / s to 3.2 m / s. The vertical axis represents the air velocity passing through the substantive support 10, and shows the results measured near the downstream side of the substantive support 10. As is clear from this graph, in the present invention having the first turbulence generating structure 61 and the second turbulence generating structure 62, the air velocity passing through the substantive support 10 is approximately 10% to 20% higher than in the comparative example not having the first turbulence generating structure 61 and the second turbulence generating structure 62. In the case of a drug diffuser 1 that uses only natural wind as in the present invention, the problem is that the amount of drug diffused is low, especially when the wind speed is low.However, by providing a first turbulence generating structure 61 and a second turbulence generating structure 62, the wind speed passing through the drug holder 10 can be increased, so that the amount of drug diffused can be increased even if the wind is weak.

[0047] The reason why the wind speed passing through the drug holder 10 can be increased will be explained. In this embodiment, the first turbulence generating structure 61 and the second turbulence generating structure 62 are provided on both sides of the holding member 20. Therefore, natural wind blowing toward the holding member 20 is guided by the upstream surfaces of the first turbulence generating structure 61 and the second turbulence generating structure 62 and flows along these upstream surfaces toward the outside of the frame 30. The wind flow along the upstream surfaces of the first turbulence generating structure 61 and the second turbulence generating structure 62 separates from the upstream surfaces of the first turbulence generating structure 61 and the second turbulence generating structure 62 at the tips of the first turbulence generating structure 61 and the second turbulence generating structure 62, suddenly changes direction, and flows downstream. The wind flow separating from the upstream surfaces and suddenly changing direction generates turbulence downstream of the drug holder 10. When turbulence occurs downstream of the drug holder 10, negative pressure is generated downstream of the drug holder 10, causing air to be drawn from the upstream side to the downstream side of the drug holder 10. As a result, the wind speed passing through the drug holder 10 is increased using only natural wind, as shown in Figure 12, without the use of electricity.

[0048] The effect of increasing the air velocity passing through the drug carrier 10 can be further enhanced by adjusting the angles of the first turbulence generating structure 61 and the second turbulence generating structure 62. Fig. 13 is a plan view of the carrier 20. A straight line (imaginary line) extending in the direction of airflow indicated by the outline arrow is indicated by the symbol L1, and an extension line of the outer surface of the first vertical side portion 31 is indicated by the symbol L2. The angle between the line L1 and the extension line L2 is designated as α. When the angle α is in the range of 5° to 15°, turbulence is particularly likely to occur, and the air velocity passing through the drug carrier 10 can be increased by 10% to 25% compared to when the first turbulence generating structure 61 is not provided.

[0049] The effect of increasing the wind speed passing through the drug holder 10 can be further enhanced by the relationship between the width dimension E of the first plate-shaped portion 61a of the first turbulence generating structure 61 and the distance F between the inner surface of the first vertical side portion 31 and the inner surface of the second vertical side portion 32. Turbulence is particularly likely to occur when the proportion of the dimension E to the distance F is 19% or more and 25% or less, and the wind speed passing through the drug holder 10 can be increased by 10% to 24% compared to when the first turbulence generating structure 61 is not present.

[0050] Although not shown, a turbulence generating structure can also be provided on the upper or lower part of the frame 30. In this case, too, it is possible to obtain the effect of increasing the wind speed passing through the drug support 10. The turbulence generating structure may be provided on all four sides of the frame 30, or on only one arbitrary side, or on only two arbitrary sides, or on only three arbitrary sides.

[0051] 14 is a diagram showing, using particle image velocimetry, the airflows generated when air is blown into the chemical diffuser 1 according to the present invention and a comparative example without a turbulent flow generating structure. As shown in this figure, in the present invention, turbulence (vortexes) are generated downstream of the chemical diffuser 1, and the generation of these vortexes increases the flow velocity.

[0052] (Drug efficacy confirmation test) In this embodiment, the effect of increasing the wind speed passing through the chemical carrier 10 can be obtained, thereby increasing the amount of chemical released from the chemical carrier 10. In a chemical efficacy confirmation test, the chemical carrier was installed in the center of an 8-tatami mat (approx. 10.2 m) windless, constant-temperature room, and a fan was used to blow air at approximately 1 m / s. Thirty minutes after installation, adult female Culex pipiens mosquitoes were released, and the number of KDs (knockdowns) was measured over time, and the KT50 was calculated. The test was repeated three times, and the average was calculated.

[0053] The comparative example of the chemical diffuser differs from the chemical diffuser 1 of the present invention only in that it does not have a turbulence generating structure. The chemical is transfluthrin, which is volatile at room temperature. The chemical diffuser of the comparative example had a KT50 of 10.08 minutes, whereas the chemical diffuser 1 of the present invention had a KT50 of 9.47 minutes. This result shows that the chemical diffuser 1 of the present invention can increase the amount of chemical diffused compared to the comparative example.

[0054] This effect of increasing the amount of released insecticide can be achieved not only when the wind speed is 1 m / s, but also when the wind speed is, for example, about 0.5 m / s (see Figure 12). For example, mosquitoes cannot fly well when the wind speed exceeds 2 m / s, but the present invention can increase the amount of released insecticide even when the wind speed is about 1 m / s or 0.5 m / s. Therefore, when an insecticide for exterminating mosquitoes is held in the insecticide holder 10, the mosquito extermination effect can be sufficiently improved in a light breeze environment.

[0055] The above-described embodiments are merely examples in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0056] As described above, the chemical dispenser according to the present disclosure can be used to dispense various chemicals, such as insect repellents. [Explanation of symbols]

[0057] 1. Chemical diffuser 10 Drug carrier 20 Retaining member 30 Frame 31 First vertical side 33 Upper side part 61 First turbulence generation structure 62 Second turbulence generation structure 61a First plate-shaped portion 62a Second plate-shaped portion

Claims

1. A chemical support configured to hold a volatile chemical and be ventilated; A holding member that holds the drug holder; Equipped with The holding member has a turbulence generating structure that receives wind blowing from the upstream side in the ventilation direction and generates turbulence downstream of the chemical holder by the received wind.

2. The drug diffuser according to claim 1, The holding member has a frame body that holds the outer edge of the drug holder, The turbulence generating structure has a plate-shaped portion that protrudes outward from the frame body.

3. The chemical dispenser according to claim 2, the holding member is symmetrical when viewed from the direction of ventilation, and asymmetrical when viewed from the side with the center in the direction of ventilation as the center of symmetry; A drug diffuser, wherein the holding member is rotatably installed around a vertical axis.

4. The chemical dispenser according to claim 2, the holding member has a vertical side portion extending in the up-down direction and a horizontal side portion extending in the left-right direction when viewed from the ventilation direction, The vertical dimension of the vertical side portion is set to be longer than the horizontal dimension of the horizontal side portion, A drug diffuser, wherein the plate-shaped portion of the turbulence generating structure is provided continuously in the up and down directions of the vertical side portion.

5. The chemical dispenser according to claim 4, The vertical side portion has a plate shape extending in the vertical direction and the ventilation direction, A chemical diffuser, wherein the plate-shaped portion of the turbulence generating structure is integrally molded with the downstream side portion of the vertical side portion in the direction of ventilation.

6. The chemical dispenser according to claim 2, A chemical diffuser, wherein the plate-shaped portion of the turbulence generating structure protrudes from the frame body in a direction perpendicular to the direction of ventilation.

7. The drug diffuser according to claim 6, A chemical diffuser, wherein the plate-shaped portion of the turbulence generating structure is positioned downstream of the chemical holder in the direction of airflow.

Images