JP2022123021A - Heating assembly and flavor suction tool having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating assembly comprising a flavor suction tool excellent in heat insulation properties to outside.

SOLUTION: A heating assembly comprises: an inner cylinder 42 into which a flavor generation component can be inserted; an outer cylinder 45 arranged at outside of the inner cylinder; a pair of sealing members 47 which is arranged between both ends of the inner and outer cylinders for forming a sealed space having a heat insulation function between the inner and outer cylinders; and a heating member 43, in which thermal conductivity of the sealing members is lower than that of the inner cylinder in the heating assembly.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a heating assembly and flavor inhaler comprising the same.

Conventionally, flavor inhalers for inhaling flavor without burning materials are known (for example, Patent Documents 1 and 2). In such a flavor inhaler, if heat for heating the flavor source is excessively transferred to the user through the device, there is a safety problem such as the user being burned. Therefore, it is required to make it difficult for heat to be transmitted to the user.

JP 2017-148065 A Japanese Patent Publication No. 2018-522551

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating assembly that provides a flavor inhaler that is well insulated to the outside.

The inventors have found that the above problems can be solved by using a member having specific heat insulating properties, and completed the present invention. That is, the above problems are solved by the present invention described below.
(1) an inner cylinder into which the flavor-generating article can be inserted;
an outer cylinder arranged outside the inner cylinder;
a pair of sealing members arranged between both ends of the inner cylinder and the outer cylinder so as to form a sealed space having a heat insulation function between the inner cylinder and the outer cylinder;
comprising a heating element;
The thermal conductivity of the sealing member is lower than the thermal conductivity of the inner cylinder,
heating assembly.
(2) The heating assembly according to (1), wherein the difference in thermal conductivity between the inner cylinder and the sealing member is 13 W/m/K or more.
(3) The heating assembly according to (1) or (2), wherein the heating member is disposed within the enclosed space and proximate to the inner cylinder.
(4) The heating assembly according to (3), wherein the heating member is located on the outer cylinder side surface of the inner cylinder.
(5) The heating assembly according to any one of (1) to (4), further comprising thermal insulation within the enclosed space.
(6) The heating assembly of any one of (1)-(5), wherein the insulating material is an aerogel.
(7) The heating assembly of any one of (1)-(6), wherein the inner cylinder is constructed of metal.
(8) The heating assembly according to any one of (1) to (7), further comprising an isolation member in the sealed space that isolates the space from at least a portion of the sealing member.
(9) The heating assembly according to any one of (1) to (8), further comprising a cylindrical cap that communicates with the end surface of the inner cylinder.
(10) The heating assembly of any of (5)-(9), wherein the insulating material is granular.
(11) The heating assembly of any one of (1)-(10), wherein at least one of the sealing members comprises a thermosetting resin or a photocurable resin.
(12) A heating assembly according to any one of (1) to (11), wherein at least one of the sealing members has a multi-layer structure comprising multiple layers stacked in the longitudinal direction of the heating assembly.
(13) The heating assembly according to any one of (1) to (12), wherein an innermost layer of said plurality of layers comprises a photocurable resin.
(14) A flavor inhaler comprising the heating assembly according to any one of (1) to (13).

The present invention provides a heating assembly that provides a flavor inhaler that is well insulated to the outside.

The perspective view which shows the one aspect|mode of a flavor inhaler. Sectional view of the flavor inhaler of FIG. 1 is a side view of one aspect of a heating assembly; FIG. Enlarged cross section of heating assembly Diagram explaining the positional relationship between the heating assembly and the smoking article Conceptual diagram showing one mode of smoking article

1. Flavor Inhaler A flavor inhaler is a device for heating a flavor generating article to generate flavor. A flavor-generating article is an article that contains a flavor-generating base material and is capable of generating flavor or capable of inhaling flavor. A flavor-generating substrate is a substrate for generating flavor and includes an aerosol source.

FIG. 1 shows one embodiment of the flavor inhaler. As shown in FIG. 1B, the flavor inhaler 10 has an opening 12a for inserting a smoking article 110, which is one aspect of the flavor generating article. FIG. 2 is a cross-sectional view taken along line 2-2 shown in FIG. 1A. As shown in the figure, opening 12a communicates with heating assembly 41, where smoking article 110 is heated. The heating assembly will be described first, followed by details of the flavor inhaler.

(1) Heating Assembly As shown in FIG. 2, the heating assembly 41 is arranged in the heating portion 40 of the flavor inhaler 10 and forms a cylinder as a whole. The heating assembly 41 is configured to accommodate a portion of the smoking article 110 therein and has the functions of defining a flow path for air supplied to the smoking article 110 and heating the smoking article 110 from its periphery.

FIG. 3 is a side view showing one aspect of the heating assembly 41. As shown in FIG. The heating assembly 41 comprises an outer cylinder 45 , a top cap 48 and a bottom cap 50 . Although not shown, an inner cylinder is arranged inside the outer tube 45 . The inner cylinder may be covered with heat shrink tubing 52 , in which case the tubing may extend to cover a portion of top cap 48 or bottom cap 50 .

The structure of the heating assembly 41 will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view of heating assembly 41 . In the figure, 42 is an inner cylinder, 45 is an outer cylinder, 47 is a sealing member, 47t is a sealing member made of a thermosetting resin, 47p is a sealing member made of a photocurable resin, and 43 is a heating element. 54 is a closed space, 44 is a heat insulating material, 46 is a washer, 42a is a first opening, and 42b is a second opening.

Although the location where the heating member 43 is arranged is not limited, when the inner cylinder 42 and the heating member 43 are close to or in contact with each other as in this embodiment, the inner cylinder 42 transfers the heat from the heating member 43 to the smoking article 110. It preferably has good thermal conductivity because it conducts heat. The thermal conductivity of the inner cylinder 42 is preferably 10-20 W/m/K, more preferably 14-16 W/m/K. From this point of view, the material of the inner cylinder 42 is preferably metal, more preferably stainless steel. Although the material of the outer cylinder 45 is not limited, metal is preferable, and stainless steel is more preferable from the viewpoint of ease of handling and durability. The inner diameter of the inner cylinder 42 depends on the dimensions of the smoking article 110 . In one aspect, the inner diameter of the inner cylinder 42 is the same as the inner diameter of a portion of the bottom cap 50 described below. The distance between the inner cylinder 42 and the outer cylinder 45 is preferably 2-5 mm, more preferably 2.5-3.5 mm. The length of the inner cylinder 42 will be described later.

As described above, the location where the heating member 43 is arranged is not limited, and as shown in this embodiment, the smoking article 110 may be arranged and inserted on the surface of the inner cylinder 42 on the outer cylinder 45 side to heat the inserted smoking article 110 . Moreover, the heating member 43 may be provided independently of the inner cylinder 42, the outer cylinder 45, and the sealed space 54. For example, a cylinder member into which the smoking article 110 can be inserted is arranged inside the inner cylinder. Then, the heating member 43 can be provided on the cylindrical member surface. The heating member 43 is preferably capable of generating heat up to 400°C, more preferably up to 300°C, and particularly preferably up to 250°C. As the heating member 43, a film heater including a heating resistor and a polymer layer such as polyimide is preferable. Although not shown, heat shrink tubing can be used to secure the heating member 43 onto the inner cylinder 42 . It is preferable that the heating member 43 is not in contact with the sealing member 47 from the viewpoint of enhancing the heat insulating effect.

The closed space 54 has a vacuum inside or can contain a gas such as air inside, so that it has a heat insulating function and makes it difficult for the heat of the heating member 43 to be transmitted to the outer cylinder 45 . However, the inventors have found that the sealing member 47 serves as a heat bridge and the heat of the heating member 43 easily flows into the outer cylinder 45 . Therefore, in the present invention, by making the thermal conductivity of the heat bridge lower than that of the inner cylinder 42, this problem of heat leakage is solved. As a result, the temperature rise of the housing 11 is suppressed, and the user can use the flavor inhaler 10 comfortably and safely. The thermal conductivity of the sealing member 47 is preferably smaller than that of the inner cylinder 42 by 13 W/m/K or more. Specifically, the thermal conductivity of the sealing member 47 is preferably 0.1 to 1.0 W/m/K, more preferably 0.2 to 0.6 W/m/K.

The sealing member 47 preferably contains thermosetting resin or photo-setting resin. Thermosetting resin refers to a cured product formed from thermosetting monomers that react at room temperature or by heating to form a crosslinked structure, examples of which include acrylate resins, epoxy resins, urethane resins, phenol resins, and silicone resins. etc. Among them, acrylate resins are preferable from the viewpoint of curability and handleability. From the viewpoint of strength and the like, the molecular weight of the thermosetting monomer is preferably 100-1000, more preferably about 280-400.

A photocurable resin refers to a cured product formed from a photocurable monomer that forms a crosslinked structure when irradiated with light, and is preferably a UV curable resin that is cured by ultraviolet irradiation. Examples thereof include, but are not limited to, radical polymerizable acrylate resins and cationic polymerizable epoxy resins. From the viewpoint of curability and handleability, the photocurable resin is preferably a radical polymerizable acrylate resin, more preferably an epoxy acrylate resin. From the viewpoint of strength and the like, the molecular weight of the photocurable monomer is preferably about 160-270. In addition, a curable resin having both thermosetting and photocurable functions may be used.

Thermosetting resins and photocurable resins preferably have a Tg (glass transition point) of 200° C. or lower, more preferably 100° C. or lower, and particularly preferably 50° C. or lower. Since the thermosetting resin and the photocurable resin have the preferable Tg, the temperature of the portion of the sealing member 47 near the heating member 43 rises when the heating member 43 generates heat. When Tg is low, each resin becomes flexible as it is heated by the heating member 43 but does not flow, so that the stress caused by thermal expansion of the inner cylinder 42 or the inner and outer cylinders can be relieved. The curable resin may also contain known fillers such as silica and glass particles.

From the viewpoint of strength, etc., the thickness of the sealing member 47 is preferably 0.3 to 2.0 mm, more preferably 0.5 mm to 1.0 mm. The sealing member 47 preferably has a multi-layer structure comprising multiple layers stacked in the longitudinal direction of the heating assembly, more preferably the innermost layer comprising a photocurable resin. As described above, the sealed space 54 has heat insulation properties, and it is preferable to provide the sealed space 54 with the heat insulating material 44 in order to further enhance the effect. In this case, if a photo-curing resin is used as the sealing member, the heat-insulating material 44 can be easily filled into the closed space 54 because the photo-curing resin is formed by a rapid curing reaction. By providing a thermosetting resin sealing member thereon, the strength of the sealing member can be increased and the heat insulating property can be further improved. Also, photocurable resins may have lower thermal conductivity than thermosetting resins, and the latter may be more prone to voids than the former. Therefore, by providing the latter sealing member on the former sealing member, it is possible to achieve higher heat conductivity and reliability.

Although FIG. 4 shows a mode in which both ends of the inner cylinder 42 and the outer cylinder 45 are sealed with the curable resin, it is preferable that at least one end is sealed with the curable resin. Also, the outer cylinder 45 may be provided with an aperture 450 . This is to prevent voids from forming in the sealing member 47 due to expansion of the air in the closed space 54 when the sealing member 47 is heated and hardened. The apertures 450 may be sealed with a known seal or the like after curing.

The heat insulating material 44 is preferably granular. The D50 diameter, which is the average particle diameter, is preferably 0.05 to 2 mm, more preferably 0.1 to 1 mm. The average particle size can be determined by image analysis. Although a portion of the heat insulating material 44 is shown in the drawing for the sake of clarity, the closed space 54 is preferably filled with a sufficient amount of the heat insulating material 44 . When the granular heat insulating material is densely filled in the sealed space 54 in this way, the heat insulating material tends to overflow from the space. It is possible. Therefore, the present invention is more effective when using granular heat insulating materials. Airgel is mentioned as a particulate thermal insulation material. Aerogels are porous materials such as silicon aerogels and carbon aerogels. The filling amount of the airgel varies depending on its density and the volume of the enclosed space 54, but in one embodiment is on the order of 100-300 mg.

Preferably, the sealing member does not contain free components. Since free components are not included, it is possible to suppress permeation of the free components into the closed space 54 or the heat insulating material 44, so that suitable heat insulation performance can be maintained. It is preferable to dispose an isolation member for isolating at least part of the sealing member 47 from the space in the sealed space 54, because even if a free component is generated, the permeation can be suppressed. In addition, if the sealing member 47 is in direct contact with the heat insulating material 44 such as airgel, the sealing member 47 or components liberated from the sealing member 47 may permeate the heat insulating material 44, resulting in insufficient heat insulation. However, by arranging the isolation member in the closed space 54, the permeation can also be suppressed. Although the material of the member is not limited, it is preferably metal, resin, or ceramic, and more preferably stainless steel. The isolation member preferably extends in the circumferential direction, and is preferably a ring-shaped member such as washer 46 . In order to prevent the isolation member from becoming a heat bridge, the isolation member is preferably arranged so as to isolate at least a portion of the sealed space 54 and the sealing member 47 . In other words, it is preferable that the separation member be arranged apart from at least one of the inner cylinder 42 and the outer cylinder 45 .

As described above, when the sealing member 47 is composed of a plurality of layers, the innermost layer is a photo-curing resin layer that cures rapidly, and a thermosetting resin layer is provided thereon to ensure sealing. is preferred. Therefore, from the viewpoint of increasing the curing speed, it is preferable that the photocurable resin layer is relatively thin and the thermosetting resin layer is relatively thick. Therefore, the thermosetting resin layer volume/photosetting resin layer volume is preferably 1.0 to 2.0, more preferably 1.2 to 1.5. The ratio of thermosetting resin layer average thickness/photosetting resin layer average thickness is preferably 1.0 to 2.0, more preferably 1.2 to 1.5. In a mode in which a separating member is provided, it is preferable that a photocurable resin layer and a thermosetting resin layer are provided in this order on the separating member, and each layer satisfies the above relationship. Further, in this embodiment, it is preferable that the photocurable resin layer covers the side surface and one main surface of the separating member so that the separating member does not come into contact with the inner cylinder 42 or the outer cylinder 45 (see the circle in FIG. 4). reference). That is, in the direction from the inner cylinder 42 of the heating assembly 41 toward the outer cylinder 45, it is preferable that the separating member and the first photocurable resin are provided in this order. More preferably, the second photocurable resins are provided in this order. In this aspect, the first photo-curable resin and the second photo-curable resin may be of the same type or of different types, but are preferably the same from the viewpoint of manufacturing. Also in this aspect, each layer preferably satisfies the above relationship. Specifically, the ratio of the volume of the thermosetting resin layer/the volume of the layer composed of the first and second photocurable resins is preferably 1.0 to 2.0, more preferably 1.2 to 1.5. The average thickness of the thermosetting resin layer/the average thickness of the layers composed of the first and second photocurable resins is preferably 1.0 to 2.0, more preferably 1.2 to 1.5. When the second photocurable resin is not used, the layer volume ratio and the layer thickness ratio may refer to the volume and thickness of the layer formed from the first photocurable resin. . The photocurable resin layer average thickness is the average value of the thicknesses of the first and second photocurable resin layers in the longitudinal direction of the heating assembly 41 excluding the isolation member.

Heating assembly 41 has a top cap 48 and a bottom cap 50 . The top cap 48 and the bottom cap 50 can be made of known resin, for example. The top cap 48 is a cylindrical member having an internal space that communicates with the first opening 42a of the inner cylinder 42, and is configured so that the smoking article 110 can be inserted therein.

As shown in FIGS. 3 and 4, the top cap 48 is connected to the first opening 42a of the inner cylinder 42. As shown in FIGS. The bottom cap 50 is an elongated cylindrical member connected to the second opening 42b of the inner cylinder 42. As shown in FIG. In FIGS. 3 and 4, since the air flows from the bottom to the top of the paper, the bottom of the paper is called the upstream, and the top of the paper is called the downstream. An internal flow path is formed for introducing air from the downstream end 50a of the bottom cap 50 toward the second opening 42b of the inner cylinder 42 . In this embodiment, the heating assembly 41 comprises a top cap 48 and a bottom cap 50 between the sealing member 47 and the inner cylinder 42 . For this reason, the airtightness of the internal flow path is enhanced, and leakage of air from the internal flow path can be suppressed.

The inner diameter of bottom cap 50 may be constant from downstream end 50a to upstream end 50b. Alternatively, the inner surface of the bottom cap 50 may be tapered so that the inner diameter of the bottom cap 50 increases from the downstream end 50a toward the upstream end 50b. When the maximum inner diameter of the bottom cap 50 is Smax and the maximum outer diameter of the smoking article 110 is Sc, the ratio of Sc to Smax (Sc/Smax) is, for example, 1.4 to 2.34 and 1.56. ~2.01 is preferred. When the maximum inner diameter of the bottom cap 50 and the maximum outer diameter of the smoking article 110 are within the above ranges, the tip portion of the smoking article 110 is securely held by the locking portion 50d of the bottom cap 50, and the sufficient air flow path 70 is formed. can be secured.

(2) Manufacture of Heating Assembly The heating assembly is preferably manufactured through the following steps.
Step 1: Prepare a double cylinder having the inner cylinder in the outer cylinder.
Step 2: Sealing between one end of the inner cylinder and an end of the outer cylinder existing in the same direction as the end with a first sealing member having a thermal conductivity lower than that of the inner cylinder. do.
Step 3: Seal between the inner cylinder and the open end of the outer cylinder with a second sealing member having lower thermal conductivity than the inner cylinder.

Step 1 can be performed, for example, by fixing a film heater as the heating member 43 to the outer peripheral surface of the inner cylinder 42 and arranging the outer cylinder 45 outside the inner cylinder 42 .

The first sealing member used in step 2 may be different from or of the same type as the second sealing member. In the former case, the first sealing member may be any material, such as thermoplastic resin or ceramic. If the top cap 48 or the bottom cap 50 is connected to the inner cylinder 42, it becomes easy to position the place to be sealed by the first sealing member. This effect is the same in step 3 as well. After sealing with the first sealing member, a separating member such as a washer may be arranged on the sealing member.

The second sealing member used in step 3 is preferably a photocurable resin. This is because photocurable monomers are capable of rapid curing and therefore have good workability. Further, between steps 2 and 3, the space formed by the inner cylinder, the outer cylinder, and the first sealing member may be filled with airgel or the like as the heat insulating material 44 . In this embodiment, if a photocurable resin is used as the second sealing member, the heat insulating material 44 can be densely filled as described above. Furthermore, in this aspect, a separating member such as a washer may be arranged on the packed layer of the heat insulating material 44 before the step 3 . Furthermore, if a thermosetting resin layer is provided on the photosetting resin layer, more reliable sealing can be achieved and the reliability of the product can be improved.

(3) Flavor Inhaler Next, the entire flavor inhaler will be described. As shown in FIG. 1, the flavor inhaler 10 has a top housing 11A, a bottom housing 11B, a cover 12, a switch 13, and a lid portion . The top housing 11A and the bottom housing 11B constitute the outermost housing 11 of the flavor inhaler 10 by being connected to each other. Housing 11 is sized to fit in the hand of a user. When the user uses the flavor inhaler 10, the user can hold the flavor inhaler 10 by hand and inhale the flavor.

As shown in FIG. 1B, cover 12 has openings 12a into which smoking articles 110 can be inserted. The lid portion 14 is configured to be movable along the surface of the cover 12 between a first position that closes the opening 12a and a second position that opens the opening 12a. A switch 13 is used to switch the operation of the flavor inhaler 10 on and off. For example, the user operates the switch 13 with the smoking article 110 inserted into the opening 12a as shown in FIG. can be heated without burning. When the smoking article 110 is heated, the aerosol evaporates from the aerosol source contained in the smoking article 110 and the aerosol incorporates the flavor of the flavor source. The user can inhale the flavor-containing aerosol by inhaling the portion of the smoking article 110 protruding from the flavor inhaler 10 (FIG. 1B). In the present invention, the longitudinal direction of the flavor inhaler 10 refers to the direction in which the smoking article 110 is inserted into the opening 12a.

Next, the internal structure of the flavor inhaler 10 will be described. FIG. 2 is a cross-sectional view taken along line 2-2 shown in FIG. 1A. As shown in FIG. 2 , the flavor inhaler 10 has a power source section 20 , a circuit section 30 and a heating section 40 in the internal space of the housing 11 . The circuit section 30 has a first circuit board 31 and a second circuit board 32 electrically connected to the first circuit board 31 . The first circuit board 31 is, for example, arranged to extend in the longitudinal direction as shown. Thus, the power source section 20 and the heating section 40 are partitioned by the first circuit board 31 . As a result, transmission of heat generated in the heating unit 40 to the power supply unit 20 is suppressed.

The power supply unit 20 has a power supply 21 electrically connected to the first circuit board 31 and the second circuit board 32 . Power source 21 may be, for example, a rechargeable battery or a non-rechargeable battery.

The heating section 40 comprises the heating assembly 41 described above. A vent hole 15 is formed in the bottom housing 11B to allow air to flow into the heating assembly 41 . Specifically, vent 15 is in fluid communication with the upstream end of heating assembly 41 . The downstream end of heating assembly 41 is in fluid communication with opening 12a shown in FIG. 1B.

With the smoking article 110 inserted into the flavor inhaler 10 through the opening 12a as shown in FIG. Air flows into the assembly 41 . The incoming air passes through the interior of the heating assembly 41 and reaches the user's mouth along with the aerosol generated from the smoking article 110 .

In the present invention, a special sealing member is used for the heating assembly 41, so that heat is not easily transferred to the housing 11, and the user can use the flavor inhaler comfortably and safely.

2. Flavor-Generating Article A smoking article 110, which is a preferred embodiment of the flavor-generating article, will now be described. FIG. 6 is a cross-sectional view of smoking article 110 . In the embodiment shown in FIG. 6, a smoking article 110 includes a base material portion 110A including a filler 111 (corresponding to an example of a flavor-generating base material) and a first wrapping paper 112 around which the filler 111 is wound. and a mouthpiece portion 110B forming an end opposite to the base portion 110A. The base material portion 110A and the mouthpiece portion 110B are connected by a second wrapping paper 113 different from the first wrapping paper 112 . However, it is also possible to omit the second wrapping paper 113 and use the first wrapping paper 112 to connect the base portion 110A and the mouthpiece portion 110B.

The mouthpiece portion 110B in FIG. 6 has a paper tube portion 114 , a filter portion 115 , and a hollow segment portion 116 arranged between the paper tube portion 114 and the filter portion 115 . The hollow segment portion 116 is composed of, for example, a packing layer having one or more hollow channels and a plug wrapper covering the packing layer.

Although the mouthpiece 110B in FIG. 6 is composed of three segments, in this embodiment the mouthpiece 110B may be composed of one or two segments, or four or more segments. may be configured.

In the embodiment shown in Figure 6, the longitudinal length of the smoking article 110 is preferably between 40mm and 90mm, more preferably between 50mm and 75mm, and even more preferably between 50mm and 60mm. The circumference of smoking article 110 is preferably between 15 mm and 25 mm, more preferably between 17 mm and 24 mm or less, and even more preferably between 20 mm and 22 mm. In the smoking article 110, the base portion 110A may have a length of 20 mm, the first wrapping paper 112 may have a length of 20 mm, the hollow segment portion 116 may have a length of 8 mm, and the filter portion 115 may have a length of 7 mm. , the length of each of these segments can be changed as appropriate according to manufacturability, required quality, and the like.

In this embodiment, the fill 111 of the smoking article 110 may contain an aerosol source that is heated at a predetermined temperature to generate an aerosol. The type of aerosol source is not particularly limited, and substances extracted from various natural products or constituents thereof can be selected depending on the application. Aerosol sources can include, for example, glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the aerosol source in the filling 111 is not particularly limited, and is usually 5% by weight or more, preferably 10% by weight or more, from the viewpoint of sufficiently generating an aerosol and imparting a good flavor and taste. It is usually 50% by weight or less, preferably 20% by weight or less.

The filling 111 of the smoking article 110 in this embodiment may contain tobacco cuts as a flavor source. Materials for shredded tobacco are not particularly limited, and known materials such as lamina and backbone can be used. The content range of the filler 111 in the smoking article 110 is, for example, 200 mg to 400 mg, preferably 250 mg to 320 mg, when the circumference is 22 mm and the length is 20 mm. The water content of the filler 111 is, for example, 10% to 15% by weight, preferably 11% to 13% by weight. Such a water content suppresses the occurrence of winding stains and improves the winding suitability during manufacturing of the base material portion 110A. Also, the filling 111 may contain one or more perfumes. The type of flavoring agent is not particularly limited, but menthol is preferable from the viewpoint of imparting a good smoking taste.

Next, the positional relationship between the smoking article 110 and the heating assembly 41 when the smoking article 110 is inserted into the flavor inhaler 10 will be described. FIG. 5 schematically shows the axial positional relationship between the base portion 110A of the smoking article 110 and the heating member 43 and inner cylinder 42 of the flavor inhaler 10 of the present embodiment. FIG. 4 is a diagram showing; The axis here means the central axis of the first opening 42a in the flavor inhaler 10, and when the smoking article 110 is inserted into the first opening 42a, the axis and the central axis of the smoking article 110 are partially aligned. overlaps.

When the axial length of the heating member 43 is D0 and the axial length of the base portion 110A of the smoking article 110 is L0, D0<L0. Furthermore, D0/L0 may be 0.70 to 0.90 or less, preferably 0.75 to 0.85, and typically 0.80. Therefore, when the length L0 of the base portion 110A is 20 mm, the length D0 of the heating member 43 is 14-18 mm, preferably 15-17 mm or less, and typically 16 mm.

Referring to FIG. 5, the upstream end of the substrate portion 110A may protrude upstream of the upstream end of the heating member 43 by a length D1. Since the portion of the substrate portion 110A protruding from the heating member 43 does not have the heating member 43 radially outward thereof, its internal temperature can be somewhat lower than that of other portions of the substrate portion 110A. . As a result, the generation of aerosols at and near the upstream end of the base material portion 110A can be suppressed, so that the aerosols generated there are prevented from condensing in the air flow path or flowing back through the air flow path and leaking out of the apparatus. can be prevented. The ratio (D1/L0) of the protruding length D1 to the length L0 of the entire base portion 110A is 0.25 to 0.40, preferably 0.30 to 0.35, and typically 0. .325. Therefore, when the length L0 of the entire base portion 110A is 20 mm, the protrusion length D1 is 5 to 8 mm, preferably 6 to 7 mm, and typically 6.5 mm. The protrusion length D1 here can also be said to be the distance in the axial direction between the upstream end of the heating member 43 and the upstream end of the inner tube 42 .

Referring to FIG. 5, the downstream end of the heating member 43 may protrude by a length D2 downstream from the downstream end of the substrate portion 110A. As a result, the downstream end of the base material portion 110A and the vicinity thereof can be sufficiently heated, so that it is possible to prevent insufficient aerosol generation and occurrence of aerosol condensation there. A ratio (D2/L0) of the protruding length D2 of the heating member 43 to the length L0 of the base portion 110A is 0.075 to 0.175, preferably 0.1 to 0.15, and is typically can be 0.125. Therefore, when the length L0 of the base material portion 110A is 20 mm, the projection length D2 of the heating member 43 is 1.5 to 3.5 mm, preferably 2 to 3 mm, typically 2.5 mm. can be

The axial positions of the upstream end of the inner cylinder 42 and the upstream end of the base material portion 110A may generally coincide. On the other hand, like the downstream end of the heating member 43, the downstream end of the inner cylinder 42 may protrude by a length D3 downstream from the downstream end of the base material portion 110A. As a result, in addition to the downstream end of the base material portion 110A and its vicinity, the upstream end of the paper tube portion 114 and its vicinity can be heated. Excessive cooling and condensation in the vicinity can be prevented. The ratio (D3/D2) of the protrusion length D3 of the inner cylinder 42 to the protrusion length D2 of the heating member 43 is 1.86 to 5.67, preferably 2.33 to 4.00, preferably It may be 3.00.

DESCRIPTION OF SYMBOLS 10... Flavor inhaler 11... Housing 12... Cover 12a... Opening 13... Switch 14... Lid part 15... Vent 16... Cap 20... Power supply part 21... Power supply 30... Circuit part 31... First circuit board 32... Second circuit Substrate 40 Heating unit 41 Heating assembly 42 Inner cylinder 42a First opening 42b Second opening 43 Heating member 44 Heat insulating material 45 Outer cylinder 450 Opening 46 Washer 47 Sealing member 47t Heat Sealing member made of curable resin 47p Sealing member made of photocurable resin 48 Top cap 50 Bottom cap 52 Heat-shrinkable tube 54 Sealed space 70 Air flow path

DESCRIPTION OF SYMBOLS 110... Smoking article 110A... Base-material part 110B... Mouthpiece part 111... Filler 112... 1st wrapping paper 113... 2nd wrapping paper 114... Paper tube part 115... Filter part 116... Hollow segment part

Claims (14)

an inner cylinder into which the flavor-generating article can be inserted;
an outer cylinder arranged outside the inner cylinder;
a pair of sealing members arranged between both ends of the inner cylinder and the outer cylinder so as to form a sealed space having a heat insulation function between the inner cylinder and the outer cylinder;
comprising a heating element;
The thermal conductivity of the sealing member is lower than the thermal conductivity of the inner cylinder,
heating assembly. 2. The heating assembly of claim 1, wherein the thermal conductivity difference between the inner cylinder and the sealing member is 13 W/m/K or more. 3. A heating assembly according to claim 1 or 2, wherein the heating member is located within the enclosed space and in close proximity to the inner cylinder. 4. The heating assembly of claim 3, wherein the heating member is located on the outer barrel-side surface of the inner barrel. A heating assembly according to any preceding claim, further comprising thermal insulation within the enclosed space. A heating assembly according to any preceding claim, wherein the insulating material is airgel. A heating assembly according to any preceding claim, wherein the inner cylinder is constructed of metal. The heating assembly according to any one of claims 1 to 7, further comprising an isolation member within the enclosed space that isolates the space from at least a portion of the sealing member. A heating assembly according to any preceding claim, further comprising a cylindrical cap communicating with an end face of the inner cylinder. A heating assembly according to any of claims 5-9, wherein the insulating material is granular. A heating assembly according to any preceding claim, wherein at least one of the sealing members comprises a thermosetting resin or a photocurable resin. A heating assembly according to any preceding claim, wherein at least one of the sealing members has a multi-layer structure comprising a plurality of layers stacked in the longitudinal direction of the heating assembly. A heating assembly according to any preceding claim, wherein an innermost layer in said plurality of layers comprises a photocurable resin. A flavor inhaler comprising a heating assembly according to any one of claims 1-13.

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