Smoking device

Abstract

To provide a smoking device that suppresses deformation of an outer container and ensures effective control of unsanitary pests and harmful organisms without occurrence of heat generation failure of a heat generator or smoke generation failure of a smoking agent.SOLUTION: A smoking device comprises a bottomed cylindrical outer container 2, a partition member 3 disposed in an internal space 5 of the outer container 2 to divide the internal space 5 along a direction orthogonal to an axial direction of the outer container 2, a lid 4 provided to cover an opening 2a of the outer container 2, a smoking agent 7 supported on the partition member 3 and arranged on the opening 2a side of the outer container 2 in the internal space 5, and a heat generator 6 accommodated on a bottom 21 side of the outer container 2 in the internal space 5 for heating the smoking agent 7 supported on the partition member 3. The partition member 3 is movable in the axial direction in the internal space 5 of the outer container 2, and the outer container 2 is formed such that the cross-sectional area of the internal space 5 defined by a side wall part 22 is smaller on the bottom 21 side than on the opening 2a side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a smoking device. [Background technology]

[0002] Fumigation devices have been commonly used as a means of exterminating harmful organisms, such as sanitary pests like flies, mosquitoes, and cockroaches, as well as microorganisms like bacteria and mold. Such fumigation devices include a fumigant and a means for heating the fumigant, and examples include devices comprising an outer container containing a heat-generating agent, an inner container containing the fumigant and disposed inside the outer container, and a lid covering the opening of the outer container.

[0003] Fumigants include those whose main components are a heat-generating base mixed with various combustion agents or foaming agents, and a chemical containing an active ingredient such as a pesticide or a fungicide. In the above-described fumigation devices, the heat-generating base is burned or decomposed by a heating means, and the resulting combustion or decomposition heat vaporizes the chemical, releasing and diffusing the chemical components into the air. Alternatively, the gas or smoke particles generated by the decomposition of the heat-generating base release and diffuse the vaporized chemical into the air in a short period of time. The chemical components thus vaporized can be used to control sanitary insects and harmful organisms.

[0004] Generally, the heating of a fumigant in a smoking device is achieved by, for example, lighting part of the fumigant with a match to burn the fumigant itself, or by heating the fumigant using the heat of the hydration reaction of a heat-generating agent such as calcium oxide. As a smoking device that utilizes the heat of hydration reaction of a heat-generating agent as described above, for example, a device has been proposed in which a hydrated heat-generating substance is filled into the internal space of a smoke tube, the internal space of which is substantially closed, a fumigation insecticide bag is placed in a recess formed in the smoke tube, and the fumigation agent is heated by supplying water to the hydrated heat-generating substance (see, for example, Patent Document 1).

[0005] As with the technology described in Patent Document 1, non-flammable containers are often used in smoking devices because they require strength and airtightness. Metal cans made of aluminum, tinplate, or the like are commonly used as such non-flammable containers, and in recent years, tin-free steel (TFS), a steel plate that does not contain tin, has come to be used as an alternative to tinplate.

[0006] On the other hand, smoking devices using metal cans as described above must be disposed of as non-combustible waste after use, which raises concerns that they may increase the environmental burden by taking up space at disposal sites, etc. For this reason, there is a demand for smoking devices that are easy to dispose of and that can further reduce the environmental burden.

[0007] In order to solve the above-mentioned problem of environmental impact when metal cans are used as containers, smoking devices using containers made of combustible materials have been proposed (see, for example, Patent Document 2). According to the smoking device described in Patent Document 2, the side walls constituting the container are made of paper, the bottom is made of a resin nonwoven fabric, and the partition member is also made of a resin nonwoven fabric, so that it can be disposed of as general combustible waste, thereby making it possible to significantly reduce the environmental impact.

[0008] However, the fumigation device described in Patent Document 2 is designed so that the partition member melts due to the heat generated by the exothermic agent, which can lead to the fumigation agent falling into gaps between the particles of the heating element contained in the exothermic agent, or the partition member remaining unmelted on the lime contained in the exothermic agent. In such cases, uneven heat generation occurs due to insufficient heat generation by the exothermic agent, which can also lead to uneven heating of the fumigation agent, resulting in a problem of reduced volatilization efficiency of the agent contained in the fumigation agent. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-338407 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-152127 Summary of the Invention [Problem to be solved by the invention]

[0010] To prevent the mixing of the fumigant containing the chemical and the exothermic agent, conventional smoking devices often employ a structure in which a partition member supporting the fumigant is fastened to the vicinity of the opening of the outer container containing the exothermic agent by means of seaming or other methods. However, when such a fastening structure is employed, it becomes difficult to accommodate volume changes (expansion) due to hydration of the exothermic agent contained in the outer container and changes in internal pressure (increase in pressure) within the exothermic agent-containing space. Therefore, for example, when a soft, flammable material such as paper or resin is used for the outer container, there is a risk of deformation or damage to the outer container.

[0011] Furthermore, when transporting a fumigation device before use, vibrations applied to the exothermic agent during transport can cause the particles to become denser than when filled, causing the top of the exothermic agent located at the bottom of the outer container to drop, potentially creating a gap between the partition member (inner container) and the exothermic agent. In such cases, the heating efficiency of the fumigation agent decreases, resulting in poor smoking, and the volatilization efficiency of the agent contained in the fumigation agent decreases, making it difficult to achieve sufficient effectiveness in controlling sanitary pests and harmful organisms.

[0012] The present invention has been made in consideration of the above problems, and aims to provide a fumigation device that can suppress deformation of the outer container due to expansion and heat generation of the heat generating agent, prevent poor heat generation due to mixing of the heat generating agent and the fumigation agent, and prevent poor smoking when the heat generating agent becomes dense due to vibration, etc., and is highly effective in controlling sanitary pests and harmful organisms. [Means for solving the problem]

[0013] In order to solve the above problems, the inventors conducted extensive research and discovered that a partition member disposed in the internal space of the outer container can be moved in the axial direction, and the cross-sectional area of ​​the internal space can be configured so that the bottom side of the outer container is smaller than the opening side. This configuration prevents deformation of the outer container even when the exothermic agent expands or the internal pressure increases, and maintains good exothermic action without mixing of the exothermic agent and the smoking agent. Furthermore, even when the exothermic agent becomes dense, no gaps are formed between the exothermic agent and the partition member, and the smoking action can be maintained with good heating efficiency, leading to the completion of the present invention.

[0014] In other words, the present invention provides a smoking device comprising a cylindrical outer container with a bottom, a partition member disposed in the internal space of the outer container and dividing the internal space along a direction perpendicular to the axial direction of the outer container, a locking member arranged to cover the opening of the outer container, a fumigant supported on the partition member and disposed on the opening side of the outer container in the internal space, and a heat generating agent contained on the bottom side of the outer container in the internal space and for heating the fumigant supported by the partition member, wherein the partition member is movable in the axial direction in the internal space of the outer container, and the outer container is configured so that the cross-sectional area of ​​the internal space defined by the side wall portion is smaller on the bottom side than on the opening side.

[0015] In the above aspect of the smoking device of the present invention, the locking member may be a lid that can limit the range of movement of the partition member in the axial direction.

[0016] In the above-mentioned aspect of the smoking device of the present invention, the outer container may be configured so that a recess is provided on at least a portion of the inner surface of the side wall portion, connecting the space on the bottom side and the space on the opening side in the internal space divided by the partition member.

[0017] In the above-described aspect of the smoking apparatus of the present invention, when the peripheral edge of the partition member is supported in the internal space of the outer container so as to be in contact with the inner surface of the side wall portion, any point on the inner surface where the peripheral edge contacts is defined as a first point P1, and a point on the inner surface opposite to the first point P1 is defined as a second point P2, and when the partition member is tilted with the first point P1 as a fulcrum so that the part of the peripheral edge on the side of the second point P2 moves toward the opening, the apex of the peripheral edge is defined as a third point P3, and the extension on the inner surface from the first point P1 through the third point P3 toward the inner surface is defined as a third point P4. A configuration can be adopted in which the point where the line intersects is defined as a fourth point P4, the triangular area enclosed by the first point P1, the second point P2, and the third point P3 is defined as a first triangular area T1, the triangular area enclosed by the second point P2, the third point P3, and the fourth point P4 is defined as a second triangular area T2, the area of ​​the first triangular area T1 is represented by a first area change amount S1, and the area of ​​the second triangular area T2 is represented by a second area change amount S2, and the passage prevention index (S1 / S2) in the gap between the side wall portion and the partition member, calculated by the following formula {first area change amount S1 / second area change amount S2}, is 20 or more.

[0018] In the above-described aspect of the smoking device of the present invention, the partition member may be configured in the shape of a container capable of containing the fumigant therein.

[0019] In addition, in the above-mentioned aspect of the smoking device of the present invention, the outer container may be configured so that the cross-sectional area at the position where the partition member contacts the inner surface of the side wall portion is larger than the cross-sectional area at the position on the bottom side.

[0020] In the above-described embodiment of the smoking apparatus of the present invention, the outer container may have an annular step on the inner surface of the side wall, capable of supporting the partition member, or two annular steps may be provided at two locations spaced apart in the axial direction. When such a configuration is adopted, the partition member only needs to be supported by the step located on the opening side in the axial direction, and the partition member may or may not be supported by the step located on the bottom side.

[0021] In addition, in the above-described aspect of the smoking device of the present invention, the outer container may be made of a pulp material.

[0022] In addition, in the above-mentioned aspect of the smoking device of the present invention, the outer container may be configured so that the side wall portion has a tapered shape that gradually increases in diameter from the bottom side toward the opening side.

[0023] The term "axial direction" used herein refers to the direction along the central axis of the cylindrical outer container. That is, the term "axially movable" in this specification refers to the case where the partition member slides along the central axis while maintaining its position separating the internal space, and also includes the case where a part of the peripheral edge of the partition member moves toward the opening of the outer container so as to tilt (see Figures 7(a) and (b)). Furthermore, with regard to the partition member described in this specification, "dividing along a direction perpendicular to the axial direction" means that the partition member is arranged along the radial direction of the outer container (the width direction in Figure 2), thereby dividing the internal space into upper and lower parts (the vertical direction in Figure 2). Furthermore, when the partition member "divides along a direction perpendicular to the axial direction," this does not only mean that the partition member is arranged so as to be roughly along the radial direction of the outer container, but also includes, for example, the case where the partition member moves so as to be slightly tilted, as described above. [Effects of the Invention]

[0024] According to the smoking device of the present invention, the partition member placed in the internal space of the outer container as described above is movable in the axial direction, and the cross-sectional area of ​​the internal space is smaller on the bottom side of the outer container than on the opening side. With the above-described configuration, even if the heat generating agent expands or the internal pressure of the space in which the heat generating agent is placed increases, these changes can be absorbed by the movement of the partition member. In addition, the fumigant can be prevented from falling from the partition member and mixing with the exothermic agent, thereby preventing the exothermic agent from generating heat poorly. Furthermore, even if the heat generating agent becomes dense due to vibration or the like and the position of the upper end of the heat generating agent drops, the partition member moves while remaining in contact with the upper end of the heat generating agent, preventing gaps from forming between them, thereby making it possible to heat the fumigant efficiently. Therefore, it is possible to provide a fumigation device that can stably obtain the effect of controlling sanitary pests, harmful organisms, etc.

[0025] Other objects, features and advantages of the present invention will become apparent from the following description of the preferred embodiments of the present invention, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram for explaining one embodiment of a smoking apparatus according to the present invention, and is a perspective view showing the entire smoking apparatus. [Figure 2] FIG. 2 is a diagram illustrating one embodiment of the smoking device according to the present invention, and is a cross-sectional view taken along line AA in FIG. [Figure 3] Figure 3 is a diagram illustrating one embodiment of a smoking device according to the present invention, in which Figure 3(a) is a plan view of the outer container seen from the opening side, Figure 3(b) is a cross-sectional view taken along line BB in Figure 3(a), and Figure 3(c) is a cross-sectional view taken along line CC in Figure 3(a). [Figure 4] Figure 4 is a diagram illustrating one embodiment of a smoking device according to the present invention, in which Figure 4(a) is an enlarged view of the main part of the step portion shown in the cross-sectional view of Figure 3(b), and Figure 4(b) is an enlarged view of the main part of the recessed portion shown in the cross-sectional view of Figure 3(c). [Figure 5] FIG. 5 is a diagram for explaining one embodiment of a smoking apparatus according to the present invention, and is a perspective view showing a state in which a partition member is disposed in the internal space of the outer container. [Figure 6] Figure 6 is a diagram illustrating one embodiment of a smoking device according to the present invention, and Figures 6(a) to (i) are plan views that schematically show other examples of the planar shapes of the recesses shown in Figures 3(c), 4(b) and 5. [Figure 7] Figure 7 is a diagram illustrating one embodiment of the smoking device of the present invention, and Figures 7(a) and (b) are schematic cross-sectional views illustrating the passage prevention index (S1 / S2) calculated from the area changes S1 and S2 of the triangular regions T1 and T2 when the partition member arranged in the internal space of the outer container is tilted. DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the smoking device according to the present invention will be described in detail with reference to the drawings as appropriate. In addition, in order to make the features of the smoking device of the present invention easier to understand, the drawings used in the following explanation may show characteristic parts slightly enlarged for convenience, and the dimensional ratios of each component may differ from the actual ones. Furthermore, the materials, dimensions, etc. exemplified in the following explanation are merely examples, and the present invention is not limited to them, and can be implemented by making appropriate changes within the scope of the present invention.

[0028] [Overall configuration of the smoking device] FIG. 1 is a perspective view showing a smoking device 1 of this embodiment, and FIG. 2 is a cross-sectional view taken along line AA in FIG. Figure 3(a) is a plan view of the outer container 2 seen from the opening 2a side, Figure 3(b) is a cross-sectional view taken along line BB in Figure 3(a), and Figure 3(c) is a cross-sectional view taken along line CC in Figure 3(a). Figure 4(a) is an enlarged view of the main parts of the step portions 24a and 24b shown in the cross-sectional view of Figure 3(b), and Figure 4(b) is an enlarged view of the main parts of the recess 25 shown in the cross-sectional view of Figure 3(c). FIG. 5 is a perspective view showing a state in which the partition member 3 is disposed in the internal space 5 of the outer container 2. As shown in FIG. 6(a) to 6(i) are plan views each showing, in outline, other examples of the shape in plan view of the recess 25 shown in FIG. 3(c), FIG. 4(b), and FIG. Figures 7(a) and (b) are schematic cross-sectional views illustrating the passage prevention index (S1 / S2) calculated from the area changes S1 and S2 of the triangular regions T1 and T2 when the partition member 3 arranged in the internal space 5 of the outer container 2 is tilted.

[0029] As shown in FIGS. 1 and 2, the smoking device 1 of this embodiment is generally configured to include an outer container 2, a partition member 3, a lid (locking member) 4, a fumigant 7, and a heat generating agent 6. In the smoking device 1 of this embodiment, the partition member 3 is movable in the axial direction along the central axis J of the outer container 2 in the internal space 5 of the outer container 2, and the outer container 2 is configured so that the cross-sectional area of ​​the internal space 5 defined by the side wall portion 22 is smaller on the bottom 21 side than on the opening 2a side.

[0030] In the smoking device 1 of this embodiment, when the outer container 2, which contains the heat-generating agent 6 on the bottom 21, is immersed in water, the water is drawn into the internal space 5 of the outer container 2 through the plurality of through-holes 21a provided in the bottom 21, causing the heat-generating agent 6 to generate heat through a hydration reaction, thereby heating the fumigant 7 supported on the partition member 3. As the fumigant 7 is heated in this manner, the agent contained in the fumigant 7 is released and volatilized into the air through the plurality of volatilization holes 41a provided in the lid 4. The smoking device 1 of this embodiment is capable of controlling sanitary pests and harmful organisms present in the air, as well as on the surfaces of ceilings, walls, floors, tatami mats, shelves, etc., by volatilizing the agent contained in the fumigant 7 as described above.

[0031] As shown in Figures 1 to 3, the outer container 2 is configured as a bottomed cylinder having a bottom 21, a side wall 22, and an opening 2a, and in the illustrated example, the side wall 22 is a slightly tapered, roughly cylindrical container. 2, the inner space 5 of the outer container 2 contains a heat generating agent 6, a partition member 3, and a fumigant 7, and the opening 2a of the outer container 2 is covered with a lid 4. In other words, the outer container 2 also functions as a housing for the smoking device 1.

[0032] The bottom 21 functions as a grounding portion of the outer container 2 and also functions as a bottom plate for supporting the exothermic agent 6 contained in the internal space 5. A plurality of through holes 21a for introducing water into the internal space 5 are formed in the bottom 21, and in the example shown in Fig. 2 and Figs. 3(a) to (c), the through holes 21a are arranged at four locations at equal intervals in a roughly cross shape in a plan view, and are also arranged at intersections of the cross, for a total of five locations.

[0033] The side wall portion 22 is a side wall formed to rise from the peripheral edge of the bottom portion 21, and as described above, has a slightly tapered shape so that the diameter gradually increases toward the opening 2a. Furthermore, on the inner surface 22A of the side wall portion 22, stepped portions 24a, 24b capable of supporting a partition member 3, the details of which will be described later, are provided in two annular positions spaced apart in the axial direction of the central axis J. In the illustrated example, the stepped portion 24a is provided between the lower wall 22a rising from the bottom portion 21 and the intermediate wall 22b above it, and the stepped portion 24b is provided between the intermediate wall 22b and the upper wall 22c on the opening 2a side. In the illustrated example, steps are also formed on the outer surface of the side wall portion 22 at positions corresponding to the step portions 24a and 24b.

[0034] The side wall 22 has a flange-like expanded portion 23 in the vicinity of the opening 2a, which has a larger diameter than the upper wall 22c. The expanded portion 23 functions as a support for the lid 4 when the lid 4, which will be described in detail later, is attached to the outer container 2.

[0035] The material of the outer container 2 is not particularly limited, but it is preferable to use a flammable material that has a small environmental impact, such as a pulp material made of paper. On the other hand, the material of the outer container 2 is not limited to the above-mentioned pulp material, and taking into consideration that it can be disposed of in a manner that does not increase the environmental burden and has excellent strength characteristics, it is also possible to use a multi-layer material, for example, one made by laminating paper, resin sheet, metal foil, etc.

[0036] Furthermore, as shown in Figures 3(c), 4(b) and 5, the smoking device 1 illustrated in this embodiment has a recess 25 provided on at least a portion of the inner surface 22A of the side wall portion 22 of the outer container 2, and in the illustrated example, the recess 25 is provided at one location on the inner surface 22A.

[0037] The recess 25 in the illustrated example has its lower end 25a located at the position of the step portion 24a of the outer container 2, and its upper end 25b located at the position of the expanded portion 23. The recess 25 in the illustrated example is composed of a lower recess 25A provided between the step portions 24a and 24b, i.e., in the middle wall 22b of the side wall portion 22, and an upper recess 25B provided between the step portion 24b and the expanding portion 23, i.e., in the upper wall 22c, and a connection end 25c between the lower recess 25A and the upper recess 25B is located at the position of the step portion 24b. The lower recess 25A and the upper recess 25B in the illustrated example each have a generally inverted trapezoidal shape in a plan view.

[0038] The lower recess 25A and the upper recess 25B each have a back wall 251a or a back wall 251b that forms the bottom of the recess. The lower recess 25A and the upper recess 25B each have an inclined wall 252a or an inclined wall 252b that is inclined from the back wall 251a or the back wall 251b toward the surface of the inner side surface 22A.

[0039] With the above-described configuration, recess 25 allows ventilation between the heat generation space (space) 5A on the bottom 21 side and the smoking space (space) 5B on the opening 2a side in the internal space 5 divided by partition member 3. As a result, even if the pressure in heat generation space 5A increases more than expected due to the progress of the hydration reaction of heat generating agent 6, for example, this pressure can be released through recess 25, making it possible to prevent the behavior of partition member 3 from becoming too large.

[0040] In this embodiment, the outer container 2 is exemplified as a cylindrical container with a circular bottom 21, but the shape of the outer container 2 is not limited to this. The outer container 2 may be, for example, a cylindrical container with an elliptical bottom 21, or a rectangular container with a square or rectangular bottom 21. Alternatively, the outer container 2 may be a cylindrical container with a star-shaped bottom 21.

[0041] In addition, although the outer container 2 in the illustrated example is formed in a tapered shape that gradually increases in diameter toward the opening 2a, the shape is not limited to this. For example, the side wall portion 22 may have a shape that gradually increases in diameter in multiple stages toward the opening 2a.

[0042] Furthermore, the shape and size of the through-hole 21a in a plan view are not particularly limited, and can be set appropriately taking into consideration the ease of taking in water into the outer container 2. For example, the through-hole 21a may be rectangular in a plan view, or may be polygonal, such as a hexagon. Furthermore, if the through hole 21a has a circular shape in plan view as in the illustrated example, its diameter can be, for example, in the range of 0.5 to 10 mm, and if it has a rectangular shape in plan view, it can be, for example, a square with sides measuring 0.5 to 10 mm, or a rectangle of approximately 0.5 to 10 mm x 10 to 0.5 mm.

[0043] If the size of the through-holes 21a is made large in consideration of the ease of taking water into the outer container 2, for example, a water-permeable nonwoven fabric or the like may be appropriately placed on the bottom 21 to prevent the exothermic agent 6 from leaking out of the through-holes 21a. This makes it possible to efficiently take in water into the outer container 2 while preventing the exothermic agent 6 from leaking out, thereby enabling the hydration reaction of the exothermic agent 6 to occur effectively.

[0044] As described above, the partition member 3 is disposed in the internal space 5 of the outer container 2 and divides this internal space 5 along a direction perpendicular to the axial direction of the outer container 2. In the example shown in Figures 2 and 5, the partition member 3 is configured in a general container shape having a bottom plate 31 and side plates 32. The partition member 3 in the illustrated example is configured as an inner container that can be disposed in the internal space 5 of the outer container 2, with the side plates 32 arranged to rise from the periphery of the bottom plate 31 and the upper ends of the side plates 32 forming an opening end 3a.

[0045] The space defined by the bottom plate 31 and side plate 32 of the partition member 3 contains a fumigant 7, the details of which will be described later, and is supported by the bottom plate 31 and side plate 32.

[0046] 2, the position of the opening edge 3a of the side plate 32 is formed in a shape that protrudes slightly in the outer circumferential direction, i.e., in a flange shape, so that the position of the opening edge 3a is supported by the step portion 24b of the outer container 2. In this embodiment, it is only necessary that the partition member 3 is supported by the step portion 24b, and the partition member 3 may or may not be supported by the step portion 24a.

[0047] By dividing the internal space 5, the partition member 3 has the function of preventing the heat generating agent 6 and the fumigant 7 from mixing, for example, during storage or transportation of the smoking device 1 after manufacture. The partition member 3 also has the function of transmitting the heat generated by the hydration reaction of the heat generating agent 6 toward the fumigant 7 supported on the partition member 3.

[0048] The material of the partition member 3 is not particularly limited, and any material that has excellent heat resistance and thermal conductivity and can be disposed of without increasing the environmental load can be used without any restrictions. From this perspective, the material of the partition member 3 can be, for example, aluminum and its alloy materials, as well as multi-layer materials laminated with paper, resin sheets, metal foil, etc. Furthermore, when such a multi-layer material is used for the partition member 3, it is preferable from the viewpoint of the heating efficiency of the fumigant 7 supported by the partition member 3 that the metal layer be positioned on the heat-generating agent 6 side when the partition member 3 is housed in the internal space 5 of the outer container 2.

[0049] Furthermore, by constructing the partition member 3 from the above-mentioned material, the partition member 3 will not melt down due to the heat generated by the heat generating agent 6, so the heat generating agent 6 will not have poor heat generation and will be able to transmit heat evenly towards the fumigant 7, resulting in excellent heating efficiency.

[0050] In this embodiment, the partition member 3 is described as being shaped like a container as shown in Figure 2, but the shape of the locking member is not limited to this container shape. The locking member may be of any shape as long as it can divide the internal space 5 of the outer container 2 and can support the fumigant 7. For example, it is possible to employ a plate-shaped partition member 30 as shown in Figures 7(a) and (b).

[0051] As described above, the lid (locking member) 4 is provided so as to cover the opening 2a of the outer container 2. In the example shown in Figures 1 and 2, the lid 4 is formed so that side plates 42 rise from the periphery of a bottom plate 41 that is circular in plan view, and is configured in a general container shape with an open upper end 4a. Furthermore, the lid 4 has a flange portion 43 formed by the upper end 4a of the side plate 42 projecting outward in the outer periphery direction.

[0052] Bottom plate 41 is also provided with volatilization holes 41a for volatilizing chemical components contained in fumigant 7, which will be described in detail later, into the air. In the illustrated example, volatilization holes 41a, which are circular in plan view, are arranged at equal intervals in a ring shape at eight locations on bottom plate 41. In the illustrated example, one volatilization hole 41a is also arranged in the center of the ring so that it is surrounded by the eight volatilization holes 41a arranged in a ring shape, for a total of nine volatilization holes 41a. Moreover, the volatilization hole 41a in the illustrated example has a shape in which the peripheral edge is cut upward toward the upper end 4a.

[0053] Lid 4 covers opening 2a of outer container 2 by joining flange 43 to expansion portion 23 of outer container 2 while engaging with it. This allows lid 4 to prevent fumigant 7 contained in internal space 5 (fumigation space 5B) from escaping to the outside, and also functions as a locking member that can limit the range of movement of partition member 3 in the axial direction along central axis J.

[0054] The number and arrangement of the evaporation holes 41a provided in the bottom plate 41 are not limited to those shown in the illustration. For example, the evaporation holes 41a may be provided in more or fewer locations than the nine shown in the illustration. The arrangement of the evaporation holes 41a is also not limited to the annular arrangement shown in the illustration, and various arrangements, such as a lattice arrangement, can be adopted.

[0055] The planar shape and size of the volatilization hole 41a are not particularly limited, and can be set appropriately taking into consideration the volatilization of the agent contained in the fumigation agent 7. For example, the volatilization hole 41a may be rectangular in plan view, or may be polygonal, such as a hexagon. If the volatilization hole 41a is circular in plan view as in the illustrated example, its diameter can be in the range of 0.5 to 10 mm, for example. If the volatilization hole 41a is rectangular in plan view, it ... shape of a square with sides ranging from 0.5 to 10 mm, or a rectangle measuring approximately 0.5 to 10 mm by 10 to 0.5 mm.

[0056] The material of the lid 4 is not particularly limited, but it is preferable that it can be joined to the outer container 2 by welding or adhesive. For example, in addition to general resin materials, aluminum or paper, which can be disposed of without increasing the environmental burden, can be used.

[0057] The heat generating agent 6 is contained on the bottom 21 side of the outer container 2 in the internal space 5 and is provided to heat the fumigant 7 supported by the partition member 3. In the example shown in Figures 2 and 3(b), the heat generating agent 6 is placed in the heat generating space 5A on the bottom 21 side of the internal space 5, which is separated by the partition member 3. The exothermic agent 6 contains at least an exothermic substance that generates heat at a desired temperature through a hydration reaction with water.

[0058] Examples of exothermic substances that generate heat through the above-mentioned hydration reaction include quicklime (calcium oxide), magnesium chloride, aluminum chloride, calcium chloride, iron oxide, etc. Among these exothermic substances, it is preferable to use quicklime (calcium oxide) as the exothermic substance because of its ease of handling. The amount of heat generating agent 6 to be filled (capacity) in the internal space 5 (heat generating space 5A) of the outer container 2 is not particularly limited, and may be determined taking into consideration the size of the outer container 2, the amount of foaming agent contained in the fumigant 7, etc.

[0059] Fumigant 7 is supported on partition member 3 and is arranged on the opening 2a side of outer container 2 in internal space 5. Fumigant 7 is capable of volatilizing the agent into the air when heated through partition member 3 by the heat generated by exothermic agent 6, and can be, for example, one containing an agent consisting of an insecticide or the like and an exothermic base mixed with a foaming agent or the like.

[0060] The foaming agent contained in the exothermic base is one that thermally decomposes upon heating to generate a large amount of heat and, for example, carbon dioxide gas or nitrogen gas (hereinafter, sometimes simply referred to as gas). Specific examples of foaming agents include azodicarbonamide, nitrocellulose, p,p'-oxybis(benzenesulfonylhydrazide), N,N'-dinitrosopentamethylenetetramine, and azobisisobutyronitrile. Examples of inorganic foaming agents include sodium bicarbonate and ammonium carbonate. Organic foaming agents are preferred, and among the above, azodicarbonamide is preferred from the standpoints of decomposition temperature, gas generation rate, and the like. Furthermore, the azodicarbonamide used in the present invention is preferably one that thermally decomposes at around 200°C to generate gas, such as Uniform AZ (manufactured by Otsuka Chemical Co., Ltd.) and Cellmic (manufactured by Sankyo Kasei Co., Ltd.). The above-mentioned foaming agents can be used alone or in appropriate combination of two or more.

[0061] The chemicals contained in the fumigant 7 can be selected according to the purpose of the fumigation device 1, and include, but are not limited to, pest control agents such as insecticides, insect repellents, repellents, attractants, and insect growth regulators, microbial control agents such as antibacterial agents, bactericides, and fungicides, plant regulators, herbicides, deodorizers, and fragrances.

[0062] Among the above-mentioned agents, examples of pest control agents include pyrethroid insecticides such as natural pyrethrins, pyrethrins, allethrin, phthalthrin, resmethrin, furamethrin, permethrin, fenothrin, cyphenothrin, prallethrin, bifenthrin, transfluthrin, metofluthrin, profluthrin, imiprothrin, empenthrin, etofenprox, and silafluofen; carbamate insecticides such as propoxur and carbaryl; organophosphate insecticides such as fenitrothion and DDVP; oxadiazole insecticides such as metoxadiazone; phenylpyrazole insecticides such as fipronil; neonicotinoid insecticides such as imidacloprid and dinotefuran; sulfonamide insecticides such as amidoflumet; and benzamide insecticides such as brofuranilide. Insecticides; pyrrole compounds such as chlorfenapyr; insect juvenile hormone-like compounds such as methoprene and hydroprene; anti-juvenile hormone-like compounds such as precocene; molting hormone-like compounds such as ecdysone; chitin synthesis inhibitors such as chlorfluazuron, diflubenzuron, hexaflumuron, and buprofezin; phytoncides; essential oils such as peppermint oil, orange oil, cinnamon oil, and clove oil; isobornyl thiocyanoacetate (IBTA), isobornyl thiocyanoethyl ether (IBTE), quaternary ammonium salts, benzyl salicylate, DEET, di-n-butyl succinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icaridin, and 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester. The above-mentioned pest control agents can be used singly or in appropriate combination of two or more.

[0063] Among the above-mentioned pest control agents, pyrethroid insecticides, carbamate insecticides, oxadiazole insecticides, and sulfonamide insecticides are preferably used from the viewpoint of obtaining high volatility, and it is particularly preferable to use fenothrin, cyphenothrin, permethrin, metoxadiazone, propoxur, amidoflumet, broflanilide, or etofenprox.

[0064] Examples of microbicides include agricultural fungicides such as isophthalonitrile, procymidone, Bayleton, and Morestan, and environmental sanitation fungicides such as thiabendazole, 3-iodo-2-propynyl butylcarbamate (IPBC), isopropylmethylphenol (chemical name: 3-methyl-4-isopropylphenol), and IF-1000.

[0065] Examples of deodorants include lauryl methacrylate, geranyl chlorinate, catechin, polyphenols, and charcoal.

[0066] As the fragrance, various fragrances can be used depending on the purpose of the smoking device. Examples of such fragrances that can be used include fragrances described in various publications, such as "Perfume and Flavor Materials of Natural Origin," Steffen Arctander, Allured Pub. Co. (1960), "Encyclopedia of Fragrance," edited by the Japan Fragrance Manufacturers Association, Asakura Shoten (1989), "Flower Oils and Floral Compounds in Perfumery," Danute Pajaujis Anonis, Allured Pub. Co. (1993), "Perfume and Flavor Chemicals (Aroma Chemicals)," Vols. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Fundamentals of Fragrance and Perfume Blending," edited by Nakajima Mototaka, Sangyo Tosho (1995), "Synthetic Fragrances: Chemistry and Product Knowledge," written by Indo Genichi, The Chemical Daily (1996), and "Encyclopedia of Fragrance," edited by Yatagai Mitsukatsu, Maruzen (2005).

[0067] For example, when an organic foaming agent is blended into the fumigant 7, the organic foaming agent should be contained in an amount of 50 to 99% by mass, preferably 60 to 90% by mass, and more preferably 70 to 90% by mass, so that the agent blended according to the purpose can be efficiently vaporized. If the content of the organic foaming agent relative to the total amount of the fumigant 7 exceeds 99% by mass, this is not preferable from the viewpoint of moldability.

[0068] Furthermore, when incorporating chemicals for various purposes into the fumigant 7, the chemicals may be incorporated at a content of 0.5 to 80% by mass, preferably 3 to 70% by mass, and more preferably 5 to 50% by mass, relative to the total amount of the fumigant 7.

[0069] The formulation form of the fumigant 7 is not particularly limited either, and it can be in any form, such as granules, lumps, particles, powder, or solid forms such as tablets. When the smoking agent 7 is to be solid, each component can be molded into the desired shape using a known granulator or molding machine. In this case, the foaming agent and the agent according to the purpose are mixed, granulated using a binder or solvent, etc., dried, and then processed into a plate-like agent, granules, powder, fine granules, etc. Furthermore, when granulating the smoking agent 7, for example, in the case of granules, the particle size can be set to about 1 to 10 mm and the length can be set to about 1 to 30 mm.

[0070] The binder used when granulating the fumigant 7 is not particularly limited, but examples include one or more of celluloses such as carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl methyl cellulose, etc.; starch-based compounds such as pregelatinized starch, beta-starch, dextrin, starch, etc.; natural polymer compounds such as gum arabic; and synthetic polymer compounds such as polyvinyl alcohol and polyvinylpyrrolidone. These binders may be blended in an amount in the range of 0.5 to 5% by mass relative to the total amount of the fumigant 7.

[0071] The solvent is not particularly limited, but examples thereof include water, alcohols such as ethanol, propanol, and benzyl alcohol, polyhydric alcohols such as ethylene glycol, diethylene glycol, dipropylene glycol, glycerin, and 1,3-butanediol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol dimethyl ether, and diethylene glycol monoisobutyl ether. Examples of the solvent include glycol ethers such as propylene glycol monomethyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monobutyl ether, propylene glycol monopropyl ether, dipropylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, phenyl carbitol, phenyl cellosolve, and benzyl carbitol, paraffins such as liquid paraffin and n-paraffin, esters such as diethyl phthalate, benzyl benzoate, triethyl citrate, and isopropyl myristate, and others such as 3-methyl-4-methoxybutanol, N-methylpyrrolidone, and propylene carbonate. These solvents may be used alone or in any combination of two or more.

[0072] The above chemicals can be mixed and kneaded during granulation, or can be held in the granules by spraying or immersing them in a solution after granulation.

[0073] In this embodiment, fumigant 7 may contain other optional components as long as the effects of the present invention are achieved. Examples of other optional components include evaporation aids, disintegrants, rust inhibitors, stabilizers, excipients, and pigments.

[0074] Examples of evaporation aids include zinc stearate, aluminum stearate, barium stearate, calcium stearate, zinc oxide, zinc carbonate, calcium carbonate, titanium dioxide, carbon black, antimony trioxide, decabromodiphenylene oxide, trimellitic anhydride, maleic anhydride, benzotriazole, 4,4'-oxybis(benzenesulfonylhydrazide), and urea. By including any of these components in the fumigant 7, it becomes possible to adjust the evaporation efficiency of the agent.

[0075] Examples of disintegrants include organic acid esters such as parahydroxybenzoates, stearates, ethyl lactate, and chlorophenyl salicylate; organic acids such as lactic acid, malic acid, fumaric acid, tartaric acid, adipic acid, and succinic acid; and inorganic acids such as phosphoric acid. When the smoking agent 7 contains a disintegrant, disintegration of the formulation by heating is promoted, making it possible to increase the efficiency of vaporization of the agent.

[0076] Examples of the rust inhibitor include 1,2,3-benzotriazole and dicyclohexylammonium nitrite.

[0077] Examples of stabilizers include dibutylhydroxytoluene, butylhydroxyanisole, and tocopherol.

[0078] Examples of excipients include minerals such as perlite, talc, diatomaceous earth, clay, bentonite, and clay minerals; sugars such as sucrose and glucose; and sugar alcohols such as maltitol, sorbitol, and xylitol.

[0079] The fumigant 7 may further contain various surfactants, efficacy enhancers, etc., as required.

[0080] In this embodiment, it is preferable to use 1 to 20 times the weight of the heat generating agent 6 relative to the weight of the fumigant 7, and more specifically, it is more preferable to use 10 to 300 g of heat generating agent 6 for every 1 to 100 g of fumigant 7.

[0081] According to the smoking device 1 of this embodiment, as described above, the partition member 3 is movable in the axial direction along the central axis J within the internal space 5 of the outer container 2. The cross-sectional area of ​​the internal space 5 defined by the sidewall portion 22 of the outer container 2 is smaller on the bottom 21 side than on the opening 2a side. By allowing the partition member 3 to move axially without being fixed to the outer container 2, the side plate 32, which is the peripheral portion of the partition member 3, can easily move toward the opening 2a side. As a result, even if the volume of the heat generating agent 6 or the internal pressure of the heat generating space 5A changes unexpectedly and significantly due to the progress of the hydration reaction of the heat generating agent 6, the partition member 3 moves slightly toward the opening 2a side in response to these changes, creating a gap between the partition member 3 and the inner surface 22A of the outer container 2. The movement of the partition member 3 toward the opening 2a absorbs the volumetric expansion of the heat generating agent 6, and the creation of a gap between the partition member 3 and the outer container 2 allows the pressure in the heat generating space 5A to be released. Therefore, deformation and damage to the outer container 2 can be prevented.

[0082] Furthermore, because the partition member 3 is movable in the axial direction, even if the heat generating agent 6 becomes closely packed due to vibrations during transportation or the like, causing the top end of the heat generating agent 6 to drop, the partition member 3 will move while remaining in contact with the top end of the heat generating agent 6, preventing the creation of a gap between them. This maintains good contact between the heat generating agent 6 and the partition member 3, allowing the fumigant 7 to be heated uniformly and efficiently through the partition member 3, making it possible to effectively volatilize the agent contained in the fumigant 7 without causing poor smoking.

[0083] Furthermore, when two steps 24a, 24b are provided on the inner surface 22A of the outer container 2, the bottom plate 31 of the container-shaped partition member 3 is supported by the step 24a, and the position of the opening end 3a that protrudes slightly toward the outer periphery of the partition member 3 is supported by the step 24b. This makes it possible to support the partition member 3 on the inner surface 22A of the outer container 2 while positioning it in a horizontal state.

[0084] Furthermore, in the smoking device 1 of this embodiment, because the outer container 2 is configured as described above, the cross-sectional area of ​​the inner surface 22A of the side wall 22 at the position where the partition member 3 contacts is larger than the cross-sectional area at the position on the bottom 21 side. As a result, during normal use of the smoking device 1, the partition member 3, which will be described in detail later, is locked in a position where it does not fall to the bottom 21 of the outer container 2, that is, where it abuts against the stepped portions 24a, 24b. Therefore, the heat-generating agent 6 can be positioned as close as possible to the partition member 3 and the smoking agent 7, making it possible to prevent poor heat generation by the smoking agent 7.

[0085] Furthermore, the side wall 22 of the outer container 2 has a tapered shape that gradually increases in diameter from the bottom 21 toward the opening 2a, which facilitates axial movement of the partition member 3. As a result, even if the volume of the heat generating agent 6 or the pressure in the heat generating space 5A becomes larger than expected due to the progress of the hydration reaction of the heat generating agent 6, the partition member 3 quickly moves toward the opening 2a, thereby releasing the pressure. Therefore, unnecessary force can be prevented from being applied to the outer container 2, making it possible to prevent deformation or damage to the outer container 2.

[0086] Generally, in smoking devices that utilize heat generated by hydration reactions, the filling state of the heat generating agent 6 before heat generation and the manner in which water is taken up (sucked up) can affect the volume of the heat generating agent 6, causing the upper end of the heat generating agent 6 in contact with the partition member 3 to become uneven, which can result in variations in heat transfer. In contrast, in the smoking device 1 of this embodiment, the partition member 3 is movable in the axial direction, and the range of movement is limited by the lid 4, so that the partition member 3 is pressed against the upper end of the heat generating agent 6 or can abut over a wide contact area, thereby ensuring uniform heat transfer from the heat generating agent 6 to the smoking agent 7.

[0087] When manufacturing the smoking device 1 of this embodiment, it is preferable to adjust the amount of heat-generating agent 6 filled in the outer container 2 and then assemble the partition member 3 so that the bottom plate 31 of the partition member 3 comes into contact with the upper end of the heat-generating agent 6 and the partition member 3 is slightly raised above the stepped portions 24a and 24b. This ensures that the partition member 3 remains supported by the stepped portions 24a and 24b even if the heat-generating agent 6 becomes extremely closely packed and the upper end drops significantly due to vibrations, such as those caused by transporting the smoking device 1. This prevents the partition member 3 from dropping too far, thereby avoiding any impact on the heat generation state of the heat-generating agent 6.

[0088] [Passage prevention index for the gap between the side wall of the outer container and the partition member] Below, we will explain the passage prevention index, which represents the fall prevention properties of the fumigant 7 in the gap d between the side wall portion 22 of the outer container 2 and the partition member in the smoking device 1 of this embodiment, mainly with reference to Figures 7(a) and (b). 7(a) and 7(b), for the convenience of explaining the inclination angle of the partition member and for the convenience of explaining a modified example of the present invention, the partition member 30 is shown as being in the shape of a flat plate.

[0089] If the partition member 30 (see also the partition member 3 shown in Figure 2, etc.) is configured to be movable and not fixed to the outer container 2, as in the smoking device of this embodiment, it must be able to respond to sudden changes in the volume of the heat generating agent 6 and changes in the internal pressure of the heat generating space 5A, and must be designed to prevent mixing of the heat generating agent 6 and the smoking agent 7. If the partition member is configured to be movable as described above, it is possible that the partition member 30, which is supported horizontally on the stepped portion 24a of the side wall portion 22, may become tilted due to a portion of it being lifted up as a result of volume expansion due to the hydration reaction of the heat generating agent 6 or an increase in pressure in the heat generating space 5A, as in the example shown in Figure 7(a).

[0090] Therefore, when designing the partition member that will form the outer container and inner container, the inventors conducted extensive research, taking into account the possibility of the partition member being tilted as described above. As a result, they discovered that by designing the outer container and partition member while taking into account the passage prevention index (described in detail below) for gap d, which occurs as partition member 30 moves, and by imposing a certain limit on the range of movement of partition member 30, it is possible to prevent fumigant 7 from passing through gap d and falling onto exothermic agent 6.

[0091] In other words, in the smoking device of this embodiment, from the standpoint of preventing the fumigant 7 from falling onto the heat-generating agent 6, it is more preferable to determine each dimension so that the passage prevention index in the gap d between the side wall portion 22 of the outer container 2 and the partition member 30, expressed by the following equation (1), is 20 or more. Passage prevention index (S1 / S2) = first area change amount S1 / second area change amount S2 (1)

[0092] However, in the above equation (1), the first area change amount S1 is the area of ​​the first triangular region T1 shown in Figure 7(b), and the second area change amount S2 is the area of ​​the second triangular region T2 shown in the same figure. The definitions of the first triangular region T1 and the second triangular region T2 described in this embodiment will be described in detail below.

[0093] 7(a) and 7(b), when the peripheral edge of the partition member 30 is supported in contact with the inner surface 22A of the side wall portion 22 in the internal space 5 of the outer container 2, a point on the inner surface 22A where the peripheral edge of the partition member 30 abuts is defined as a first point P1. A point on the inner surface 22A opposite to the first point P1 is defined as a second point P2. When the partition member 30 is tilted with the first point P1 as a fulcrum such that the portion of the peripheral edge of the partition member 30 on the side of the second point P2 moves toward the opening 2a, a third point P3 is defined as the apex of the peripheral edge of the partition member 30. A fourth point P4 is defined as a point on the inner surface 22A where the point intersects with an extension line extending from the first point P1 through the third point P3 toward the inner surface 22A.

[0094] The triangular area surrounded by the first point P1, the second point P2, and the third point P3 is defined as the first triangular area T1, and the triangular area surrounded by the second point P2, the third point P3, and the fourth point P4 is defined as the second triangular area T2. Then, the area of ​​the first triangular region T1 is calculated as the "first area change amount S1" using the following formula (2), and the area of ​​the second triangular region T2 is calculated as the "second area change amount S2" using the following formula (3). First area change S1 = 1 / 2 × A (mm) × B (mm) × sinθ1 (2) Second area change S2 = 1 / 2 × C (mm) × D (mm) × sinθ2 (3)

[0095] In the above formula (2), "A" is the distance between the first point P1 and the third point P3 indicated by the symbol A in Fig. 7(b), and "B" is the distance between the first point P1 and the second point P2. Also, in the above formula (2), "θ1" is the interior angle of the triangle between the symbols A and B in Fig. 7(b). In the above formula (3), "C" is the distance between the second point P2 and the fourth point P4 indicated by the symbol C in Fig. 7(b), and "D" is the distance between the second point P2 and the third point P3. In addition, "θ2" in the above formula (3) is the interior angle of the triangle between the symbols C and D in Fig. 7(b). The method for calculating the areas of the triangular regions T1 and T2 (area changes S1 and S2) is not limited to the method using the above formula (2) or (3), and other area calculation formulas may be used.

[0096] By using the first area change amount S1 calculated by the above formula (2) and the second area change amount S2 calculated by the above formula (3), the passage prevention index (S1 / S2) can be calculated by the above formula (1).

[0097] By designing outer container 2 and partition member 30 so that the pass-through prevention index (S1 / S2) calculated by equation (1) above is 20 or greater, fumigant 7 can be prevented from falling onto heat generating agent 6 even if partition member 30 becomes tilted, for example, due to vibration during transportation or changes in the volume of heat generating agent 6 or the pressure in heat generating space 5A. This prevents the heat generating agent 6 and fumigant 7 from mixing, thereby preventing poor heat generation and poor smoking. On the other hand, if the pass-through prevention index (S1 / S2) is less than 20, there is a high possibility that fumigant 7 will fall onto heat generating agent 6 when partition member 30 is tilted, although this will depend on various conditions.

[0098] Furthermore, since the above-mentioned passage prevention index (S1 / S2) is 20 or more, no large gaps are created between the heat generating agent 6 and the partition member 30, and a certain level of contact can be maintained, thereby significantly reducing the frequency of poor smoking.

[0099] When designing a container-shaped partition member 3 such as the example shown in Figure 2, for example, the cross section at the position of the opening end 3a can be designed to resemble the partition member 30 shown in Figures 7(a) and (b).

[0100] Below, we will explain a calculation example to demonstrate that by setting the above-mentioned passage prevention index (S1 / S2) to 20 or more, the effect of preventing the fumigant 7 from falling onto the heat generating agent 6 can be achieved even when the partition member 30 is inclined.

[0101] Tables 1 to 4 below show a list of calculations of the pass-through prevention index (S1 / S2) while changing each of the parameters described above. Calculation examples 1 to 4 and reference examples 1 and 2 shown in Table 1 are examples in which the rising taper of the side wall portion 22 of the outer container 2 was set to 6°, the amount of heat generating agent 6 contained was set to 30 g, and the other parameters were changed. Calculation examples 5 to 12 and reference examples 3 to 6 shown in Table 2 are examples in which the rising taper of the side wall portion 22 of the outer container 2 was set to 6°, the amount of heat generating agent 6 contained was set to 55 g or 70 g, and the other parameters were changed. Calculation examples 13 to 16 and reference examples 7 and 8 shown in Table 3 are examples in which the rising taper of the side wall portion 22 of the outer container 2 was set to 15°, the amount of heat generating agent 6 contained was set to 30 g, and calculations were performed by changing the other parameters. In addition, calculation examples 17 to 24 and reference example 9 shown in Table 4 are examples in which the rising taper of the side wall portion 22 of the outer container 2 was set to 15°, the amount of heat generating agent 6 contained was set to 55 g or 70 g, and calculations were performed by changing the other parameters. The pass-through prevention index (S1 / S2) in each of Tables 1 to 4 is shown as a value rounded down to the second decimal place.

[0102] [Table 1]

[0103] [Table 2]

[0104] [Table 3]

[0105] [Table 4]

[0106] As shown in Tables 1 to 4, in calculation examples 1 to 24, the calculated values ​​of the pass-through prevention index (S1 / S2) are all 20 or more, while in reference examples 1 to 9, the calculated values ​​of the pass-through prevention index (S1 / S2) are all less than 20. In other words, as in calculation examples 1 to 24, when the design is particularly such that the angle θ1 at which the partition member 30 is tilted is kept small, or the distance C indicating the position of the third point P3 when the partition member 30 is tilted is kept small, the calculated value of the passage prevention index (S1 / S2) will be 20 or more. On the other hand, in Reference Examples 1 to 9, the calculated values ​​of the pass-through prevention index (S1 / S2) are all less than 20, particularly because the angle θ1 is large or the distance C is large. Therefore, it is believed that by minimizing the distance C indicating the position of the third point P3 when the partition member 30 is tilted, i.e., the movement distance of the partition member 30, and designing while adjusting each parameter of the outer container, partition member, etc. so that the calculated value of the above-mentioned passage prevention index (S1 / S2) is 20 or more, it is possible to prevent the fumigant from falling as the partition member moves.

[0107] In addition, in the present invention, it is possible to adjust the passage prevention index (S1 / S2) to 20 or more by adopting a configuration in which the movement of the partition member can be limited to a certain range using a locking member such as a lid.

[0108] Here, the effect obtained by the present invention, namely, the effect of being able to absorb changes by moving the partition member when the heat generating agent expands or the internal pressure of the space in which the heat generating agent is placed increases, can be sufficiently obtained simply by making the partition member movable in the axial direction as described above and configuring the cross-sectional area of ​​the internal space so that it is larger on the opening side than on the bottom side. On the other hand, in the present invention, by further designing the outer container and partition member with parameters that result in the above-mentioned passage prevention index (S1 / S2) of 20 or more, it is clear that the effect of effectively preventing the fumigant from falling as the partition member moves can be achieved, and that the effect of more reliably preventing poor heat generation, poor smoking, etc. can be achieved.

[0109] [How to use the smoking device] The method of use and operation of the smoking device 1 of this embodiment will be described below. First, the outer container 2 of the smoking device 1 is immersed in water contained in an external container (not shown). At this time, water is drawn into the internal space 5 (heat-generating space 5A) through the multiple through-holes 21a provided in the bottom 21 of the outer container 2, and the water comes into contact with the heat-generating agent 6 contained in the heat-generating space 5A.

[0110] The supplied water causes a hydration reaction in exothermic agent 6, causing the exothermic substance, such as calcium oxide, to swell and generate heat. This heat is transferred to partition member 3, which is in contact with the upper end of exothermic agent 6, and heats fumigant 7 supported on partition member 3. At this time, the exothermic base contained in fumigant 7 is thermally decomposed, generating decomposition gas. Together with this decomposition gas, the chemical agent contained in fumigant 7 is released and volatilized to the outside (into the air) through multiple volatilization holes 41a provided in lid 4.

[0111] There is no particular limitation on the amount of water supplied to the heat generating agent 6. On the other hand, from the viewpoint of enabling the heat generating agent 6 to generate heat more effectively, it is preferable to adjust the amount of water filled in a container (not shown) so that the amount of water relative to the heat generating agent 6 is in the range of 0.5 to 3 times by weight, or to adjust the molar ratio of water to the heat generating agent 6 to be in the range of 1.5 to 9 times by mass.

[0112] At this time, even if the volume of the heat generating agent 6 expands more than expected as the hydration reaction progresses or the pressure inside the heat generating space 5A containing the heat generating agent 6 increases more than expected, these changes can be effectively absorbed by the partition member 3 moving in the axial direction of the outer container 2. Therefore, deformation and damage to the outer container 2 can be prevented in advance.

[0113] [Action and effect] As described above, according to the fumigation device 1 of this embodiment, by adopting the above-mentioned configuration, even if, for example, the heat generating agent 6 expands or the internal pressure in the heat generating space 5A in which the heat generating agent 6 is placed increases, these changes can be absorbed by moving the partition member 3. Furthermore, since the fumigant 7 can be prevented from dropping from the partition member 3 and mixing with the exothermic agent 6, poor heat generation of the exothermic agent 6 can be prevented. Furthermore, even if the heat generating agent 6 becomes dense due to vibration or the like and the position of the upper end of the heat generating agent 6 drops, the partition member 3 moves while remaining in contact with the upper end of the heat generating agent 6, preventing the creation of gaps between them, thereby making it possible to heat the fumigant 7 efficiently. Therefore, the fumigation device 1 of this embodiment can stably obtain the effect of controlling sanitary pests, harmful organisms, and the like.

[0114] [Modifications of the present invention] Although the embodiments of the present invention have been described in detail above, the smoking device of the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the principles of the present invention and the scope of the appended claims.

[0115] For example, in the above embodiment, only a container-shaped partition member 3 and a flat plate-shaped partition member 30 are exemplified as partition members, but this is not limited to these, and any shape may be used as long as it can reliably divide the internal space 5 of the outer container 2 and can support the fumigant 7.

[0116] In addition, in this embodiment, the lid 4 that functions as a locking member is exemplified as one having a plurality of evaporation holes 41a in the bottom plate 41, but this is not limited to this, and it is also possible to adopt, for example, one in which a mesh member is attached to the outer frame.

[0117] In addition, in this embodiment, the recess provided on the inner surface 22A of the side wall portion 22 of the outer container 2 is described as an example of a recess 25 consisting of a lower recess 25A and an upper recess 25B that are in an inverted trapezoidal shape when viewed from above, as shown in Figures 3(c) and 4(b), etc., but the shape is not limited to this. The shape of the recess in plan view is not particularly limited as long as it has a size necessary for ventilation within the internal space 5. For example, the recess may be a recess 250a having an expanded upper portion and a generally inverted trapezoidal shape as shown in Fig. 6(a), or a generally semi-elliptical recess 250b as shown in Fig. 6(b). Alternatively, the recess may be a generally inverted triangular recess 250c as shown in Fig. 6(c), a generally pentagonal recess 250d as shown in Fig. 6(d), or a generally hexagonal recess 250e as shown in Fig. 6(e).

[0118] The planar shape of the recess may be, for example, a generally rectangular (rectangular) recess 250f with no flared top as shown in Fig. 6(f), or a semi-elliptical recess 250g as shown in Fig. 6(g). Alternatively, the recess 250h may be a generally pentagonal (approximately home plate) recess with no flared top as shown in Fig. 6(h), or a generally hexagonal recess 250i as shown in Fig. 6(i).

[0119] Among the above shapes, it is more preferable that the recess provided on the inner surface 22A of the outer container 2 has a shape in plan view with an expanded upper side (the opening 2a side in FIG. 4(b) etc.), such as recess 25 shown in FIG. 4(b) etc., or recesses 250a to 250e shown in FIG. 6(a) to (e). By providing the recess with the above shape, high breathability is ensured from the heat generation space 5A side to the smoking space 5B side, and pressure in the heat generation space 5A is easily released. [Industrial Applicability]

[0120] The smoking device of the present invention is capable of suppressing deformation of the outer container due to expansion of the exothermic agent and heat generation, and is also capable of preventing poor heat generation due to mixing of the exothermic agent and the smoking agent, and poor smoking when the exothermic agent becomes dense due to vibration, etc., and is therefore highly effective in controlling sanitary pests and harmful organisms, etc. Therefore, the smoking device of the present invention is highly suitable for use in exterminating sanitary pests such as flies, mosquitoes, cockroaches, etc., as well as harmful organisms such as microorganisms like bacteria and mold. [Explanation of symbols]

[0121] 1...Smoker 2...Outer container 2a...Opening 21…Bottom 22...Side wall 22A…Inner surface 22a...Lower wall 22b…Intermediate wall 22c…upper wall 23...Expansion section 24a, 24b...Stepped part 25...recess 25a…lower end 25b…Top end 25c...Connection end 25A...Lower recess 251a…Back wall 252a…slanted wall 25B...Upper recess 251b…Back wall 252b…slanted wall 3,30...Partition member 3a...Open end 31...Bottom plate 32...Side panel 4…Lid (locking member) 4a…Top end 41...Bottom plate 41a...Volatilization hole 42...Side panel 43...Flange 5...Inner space (outer container) 5A...heat generating space 5B...Smoked space 6...Exothermic agent 7...Fumigants J…Center axis d...gap P1...first point P2: Second point P3: Third point P4: Fourth point A, B, C, D... distance T1...first triangular region T2: Second triangular region S1: First area change amount S2: Second area change

Claims

1. a cylindrical outer container with a bottom; a partition member disposed in the inner space of the outer container and dividing the inner space along a direction perpendicular to the axial direction of the outer container; a locking member provided to cover the opening of the outer container; A fumigant supported on the partition member and disposed on the opening side of the outer container in the internal space; A heat generating agent is accommodated in the bottom side of the outer container in the internal space and is used to heat the fumigant supported by the partition member; A smoking device comprising: the partition member is movable in the axial direction in the internal space of the outer container, The outer container is configured so that the cross-sectional area of ​​the internal space defined by the side wall is smaller on the bottom side than on the opening side.

2. 2. The smoking device according to claim 1, wherein the locking member is a lid capable of limiting the range of movement of the partition member in the axial direction.

3. The fumigation device described in claim 1 or claim 2, characterized in that the outer container has a recess in at least a portion of the inner surface of the side wall portion, which connects the space on the bottom side and the space on the opening side in the internal space divided by the partition member.

4. When the peripheral edge of the partition member is supported in the internal space of the outer container so as to be in contact with the inner surface of the side wall portion, an arbitrary point on the inner surface where the peripheral edge contacts is defined as a first point P1, and a point on the inner surface opposite to the first point P1 is defined as a second point P2, When the partition member is tilted such that the portion of the peripheral edge portion on the second point P2 side moves toward the opening, with the first point P1 as a fulcrum, the apex of the peripheral edge portion is defined as a third point P3, and the point on the inner surface where the apex intersects with an extension line extending from the first point P1 through the third point P3 toward the inner surface is defined as a fourth point P4. A triangular region surrounded by the first point P1, the second point P2, and the third point P3 is defined as a first triangular region T1, a triangular region surrounded by the second point P2, the third point P3, and the fourth point P4 is defined as a second triangular region T2; A fumigation device as described in claim 1 or claim 2, characterized in that when the area of ​​the first triangular region T1 is represented by a first area change amount S1 and the area of ​​the second triangular region T2 is represented by a second area change amount S2, the passage prevention index (S1 / S2) in the gap between the side wall portion and the partition member, calculated by the following formula {first area change amount S1 / second area change amount S2}, is 20 or more.

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