WO2021084746A1

WO2021084746A1 - Heating unit

Info

Publication number: WO2021084746A1
Application number: PCT/JP2019/043103
Authority: WO
Inventors: 容進藤; 啓司丸橋
Original assignee: 日本たばこ産業株式会社
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2021-05-06
Also published as: JPWO2021084746A1; TW202119862A

Abstract

Provided is a heating unit comprising a cylindrical body into which a flavor source can be inserted, and a heat-generating sheet, wherein the heat-generating sheet is provided with a heat insulation layer that has a heat insulation member and a heater layer having a heat-generating resistor, and a connection layer that is positioned from the heater layer surface across to the heat insulation layer surface and that connects the heater layer surface to the heat insulation layer in the longitudinal direction. The heat-generating sheet is wound at least once on the outer circumferential surface of the cylindrical body, the connection layer being disposed on the inner side. At least a part of the heat insulation layer is positioned on the radially outer side of the heater layer.

Description

Heating unit

Related technology

The present invention relates to a heating unit.

A heat insulating material is used for the heating unit of the non-combustion heating type flavor suction system, which is used by heating the non-combustion heating type flavor suction device, so that the heat of the heater is not transferred to the outside of the system. As a heat insulating material, airgel and the like are known (for example, Patent Document 1).

U.S. Patent Application 2016/0262459

However, even if a heat insulating material is used, the heat insulating efficiency is not always sufficient because the heat from the end of the heat insulating material wraps around and is transmitted to the outside. Further, in order to suppress heat sneaking, it is necessary to precisely position the heater and the heat insulating material in the heating unit, but precise positioning is difficult. In view of such circumstances, it is an object of the present invention to provide a heating unit for a non-combustion heating type flavor suction system having excellent heat insulation efficiency.

The inventors have found that certain heat-generating sheets solve the above problems. That is, the above-mentioned problem is solved by the following invention.
(1) A cylinder into which a flavor source can be inserted and
A heating unit equipped with a heat-generating sheet
The heat-generating sheet is
A heater layer having a heat generating resistor, a heat insulating layer having a heat insulating material, and
A connecting layer which is arranged from the surface of the heater layer to the surface of the heat insulating layer and connects the two in the longitudinal direction is provided.
The heat-generating sheet is wound around the outer peripheral surface of the cylinder one or more turns with the connection layer inside.
At least a part of the heat insulating layer is arranged radially outside the heater layer.
Heating unit.
(2) The heating unit according to (1), wherein the heater layer is arranged on the outer side in the radial direction of the entire outer peripheral surface of the tubular body.
(3) The heating unit according to (1) or (2), wherein the heater layer has a layer having a heat generating resistor and a protective layer arranged on at least one surface of the layer.
(4) The heating unit according to any one of (1) to (3), wherein the connecting layer has an adhesive layer.
(5) The heater layer has a layer having a heat generating resistor and a protective layer arranged on both surfaces of the layer.
The heating unit according to (3) or (4), wherein the protective layer existing on the connecting layer side is arranged on the entire surface of the layer having the heat generating resistor.
(6) The heater layer has a layer having a heat generating resistor and a protective layer arranged on a surface opposite to the connection layer side of the layer.
The heating unit according to (3) or (4), wherein the connecting layer exists from the entire surface of the layer having the heat generating resistor to the entire surface or a part of the surface of the heat insulating layer.
(7) The connecting layer has an adhesive layer and a protective layer for protecting the heat generating resistor arranged on the adhesive layer.
The heating unit according to (6), wherein the protective layer and the layer having the heat generating resistor are in contact with each other.
(8) Step of preparing a cylinder into which a flavor source can be inserted,
A step of preparing a heat-generating sheet including a heater layer having a heat-generating resistor, a heat-insulating layer having a heat insulating material, and a connecting layer arranged from the surface of the heater layer to the surface of the heat-insulating layer and connecting the two in the longitudinal direction. The method for manufacturing a heating unit according to any one of (1) to (7), further comprising a step of winding the heat-generating sheet around the outer peripheral surface of the cylinder one or more turns with the connection layer inside.
(9) A heater layer having a heat generating resistor, a heat insulating layer having a heat insulating material, and
A connecting layer which is arranged from the surface of the heater layer to the surface of the heat insulating layer and connects the two in the longitudinal direction is provided.
A heat-generating sheet for heating the flavor source.
(10) The method for producing a heat-generating sheet according to (9) above.
A step of preparing a heater layer having a layer having a heat generating resistor and a protective layer on both sides of the layer.
A step of preparing the heat insulating layer, and a step of arranging the connecting layer from the surface of the protective layer to the surface of the heat insulating layer to connect the heater layer and the heat insulating layer.
A manufacturing method comprising.
(11) The method for producing a heat-generating sheet according to (9) above.
A step of preparing a heater layer having a layer having a heat generating resistor and a protective layer on one side of the layer.
A step of preparing the heat insulating layer, and a step of arranging the connecting layer from the surface of the layer having the heat generating resistor to the surface of the heat insulating layer to connect the heater layer and the heat insulating layer.
A manufacturing method comprising.

According to the present invention, it is possible to provide a heating unit for a non-combustion heating type flavor suction system having excellent adiabatic efficiency.

Perspective view showing the concept of the heating unit of the present invention. Sectional drawing which shows the concept of the heating unit of this invention The figure which shows one aspect of the heat generating sheet of this invention The figure which shows one aspect of the heat generating sheet of this invention The figure which shows one aspect of the heat generating sheet of this invention The figure which shows one aspect of the heat generating sheet of this invention

1. 1. Heating unit The heating unit of the present invention includes a cylinder and a heat-generating sheet wound around the outer peripheral surface of the cylinder. 1 and 2 are perspective views and cross-sectional views showing the concept of the heating unit of the present invention. In the figure, 1 is a heating unit, 3 is a heat-generating sheet, 31 is a connection layer, 33 is a heater layer having a heat-generating resistor (hereinafter, also simply referred to as “heater layer”), and 35 is a heat-insulating layer having a heat insulating material (hereinafter, simply (Also referred to as "insulation layer"), 5 is a cylinder. In these figures, the thickness of the heat-generating sheet 3 is shown larger than the wall thickness of the tubular body 5 for easy understanding, but the actual relationship between the two thicknesses is as described later. Further, in these figures, the heat-generating sheets 3 are loosely wound, but in reality, the heat-generating sheets 3 are in close contact with each other in the stacking direction.

The heat-generating sheet 3 is wound around the outer peripheral surface of the tubular body 5 one or more turns with the connection layer 31 inside. At least a part of the heat insulating layer 35 is arranged radially outside the heater layer 33. With such a structure, the heat insulating effect can be enhanced. Therefore, it is preferable that the heat insulating layer 35 is arranged on the entire outer surface of the heater layer 33 in the radial direction. The radial outside means a direction extending vertically from the central axis of the tubular body 5 toward the peripheral surface. As will be described later, the cross section of the tubular body 5 may be other than circular, but even in this case, for convenience in the present invention, the direction extending vertically from the central axis of the tubular body 5 toward the peripheral surface is referred to as the outer side in the radial direction. ..

Since the heat-generating sheet 3 is wound around the outer peripheral surface of the cylinder 5 one or more turns, the length of the heat-generating sheet 3 is one or more times the outer peripheral length of the cylinder 5. In order to increase the heating efficiency, it is preferable that the heater layer 33 exists on the outer side in the radial direction of the entire outer peripheral surface of the tubular body 5. That is, the length of the heater layer 33 is preferably one or more times the outer peripheral length of the tubular body 5. However, considering the balance between heating efficiency and heat insulation efficiency, the length of the heater layer 33 is preferably twice or less the outer peripheral length of the tubular body 5. Further, it is preferable that the heat insulating layer 35 is arranged on the outer side in the radial direction of the heater layer 33, and it is more preferable that the heat insulating layer 35 is arranged so as to cover the entire surface of the heater layer 33. Therefore, the length of the heat insulating layer 35 is preferably one or more times the outer peripheral length of the tubular body 5. However, in consideration of manufacturing efficiency and the like, the length of the heat insulating layer 35 is preferably twice or less the outer peripheral length of the tubular body 5. From the above, the lower limit of the length of the heat-generating sheet 3 can be 2 times or more or 3 times or more of the outer peripheral length, and the upper limit thereof is 5 times or less, 4 times or less, or 2 of the outer peripheral length. It can be 5.5 times or less.

The thickness of the heat-generating sheet 3 is preferably 0.1 to 0.3 mm, more preferably 0.12 to 0.20 mm. Since the heat-generating sheet 3 includes a case where the thickness is not uniform, the thickness of the heat-generating sheet 3 is defined as the maximum thickness of the sheet. The thickness of each layer will be described later.

In order to improve the heat insulating property, it is preferable that the widths of the heater layer 33 and the heat insulating layer 35 are the same or the width of the heat insulating layer 35 is large. Similarly, the width of the connecting layer 31 is preferably equal to or greater than the width of the heater layer 33. Therefore, the width of the heat-generating sheet 3 is defined as the maximum width of each layer. The width of the heat-generating sheet 3 is preferably the same as the length of the tubular body 5. In one embodiment, the outer diameter of the tubular body 5 is about 3 to 10 mm and the length is about 10 to 50 mm, so that the dimensions of the heat-generating sheet 3 can be about 40 to 200 mm in length and about 10 to 50 mm in width. Hereinafter, each member will be described.

(1) Heat-generating sheet The heat-generating sheet 3 heats the flavor source to 50 to 400 ° C. FIG. 3 shows an outline of the heat-generating sheet. The connection layer 31 is arranged from the surface of the heater layer 33 to the surface of the heat insulating layer 35, and connects the two in the longitudinal direction. In the figure, the heater layer 33 and the heat insulating layer 35 are in contact with each other in the longitudinal direction, but they may be arranged apart from each other.

1) Heater layer As will be described later, the heater layer 33 has, in one embodiment, a layer 330 having a heat generating resistor and a protective layer 37 arranged on at least one surface of the layer (see, for example, FIG. 4). The heat generation resistor is a material such as a metal that generates heat when energized, and for example, W, Cu, or the like can be used. The layer having a heat-generating resistor means a layer in which a heat-generating resistor pattern is formed on a base material having high heat resistance, or the heat-generating resistor pattern itself. The pattern shape may be a known shape. In this case, the thickness of the heat generating resistor pattern can be about 10 to 30 μm. Examples of the base material having high heat resistance include engineering plastics, thermosetting resins, ceramics and the like. The thickness of the base material having high heat resistance is not limited, but can be about 10 to 100 μm.

The protective layer 37 is a layer for suppressing deterioration due to corrosion or damage of the heat generating resistor, and for example, engineering plastics such as polyester and polyimide can be used. The thickness of the protective layer is not limited and can be about 10 to 100 μm.

2) Insulation layer The insulation layer 35 is a layer having low thermal conductivity, and in one embodiment, refers to a layer having lower thermal conductivity than the tubular body 5. The difference in thermal conductivity between the tubular body 5 and the heat insulating layer 35 is preferably 13 W / m / K or more. For the heat insulating layer 35, a known material, for example, a sheet-like material containing airgel can be used. Examples of the sheet-like material containing airgel include an airgel-containing paper obtained by papermaking a pulp slurry containing airgel, an airgel-containing polymer sheet obtained by casting a polymer solution containing airgel, and the like. The thickness of the heat insulating layer is not limited, but can be about 10 to 1000 μm.

3) Connection layer The connection layer 31 connects the heater layer 33 and the heat insulating layer 35. The connection layer 31 may be arranged from a part or all of the surface of the heater layer 33 to a part or all of the surface of the heat insulating layer 35. It is preferable that the connecting layer 31 is in direct contact with the tubular body 5, and the tubular body 5 is made of metal as described later. Therefore, it is preferable that the connecting layer 31 is insulating because it is possible to prevent the heat generating resistor and the cylinder 5 from being short-circuited. Further, if the connecting layer 31 is excessively thick, the heat transfer property to the tubular body 5 is lowered. From these viewpoints, the thickness of the connecting layer 31 is preferably about 1 to 20 μm.

The connection layer 31 may include a plurality of sub-layers (sub-layers). An adhesive layer can be mentioned as an auxiliary layer. It is preferable that the connecting layer 31 has an adhesive layer because the heat-generating sheet 3 can be easily fixed to the tubular body 5. Examples of the adhesive layer include a layer made of a known adhesive such as an epoxy adhesive, an acrylic adhesive, or a silicone adhesive, or a layer formed by applying or impregnating a non-woven fabric such as paper with an adhesive. Further, the connecting layer 31 may include a protective layer 37 as an auxiliary layer.

A plurality of heater layers 33 and a plurality of heat insulating layers 35 may be present in the heat generating sheet 3, but it is preferable that both of them are present in a pair in consideration of manufacturing efficiency and the like.

4) Specific Embodiments Hereinafter, specific embodiments of the heat-generating sheet 3 will be described with reference to the drawings.
A) Aspect in which protective layers are provided on both sides of a layer having a heat generating resistor FIG. 4 shows a mode in which protective layers 37 are provided on both sides of a layer 330 having a heat generating resistor. The protective layer 37b existing on the connection layer 31 side is arranged on the entire surface of the layer 330 having the heat generating resistor from the viewpoint of corrosion prevention and short circuit prevention. As shown in FIG. 4 (3), it is preferable that the layer 330 having the heat generating resistor in this embodiment has a heat generating resistor pattern. Further, FIG. 4 (1) shows an embodiment in which the connection layer 31 is arranged from the entire surface of the heater layer 33 to the entire surface of the heat insulating layer 35, but as shown in FIG. 4 (2), the connection layer 31 is the surface of the heater layer 33. It may be arranged from a part of the heat insulating layer 35 over a part of the surface of the heat insulating layer 35. In such an embodiment, the length L of the heat-generating sheet 3 is defined as the length between the outer end surface of the layer existing at one of the leading ends and the outer end surface of the layer at the other leading end. The length Lh of the heater layer 33 is preferably substantially the same as the outer peripheral length of the tubular body 1 (approximately 1 times the length). The same applies to other aspects.

The heat-generating sheet of this embodiment can be produced, for example, by a method including the following steps.
Step A1 of preparing a layer 330 having a heat generating resistor and a heater layer 33 having a protective layer 37 on both surfaces of the layer.
Step A2 for preparing the heat insulating layer 35, and step A3 for arranging the connecting layer 31 from the surface of the protective layer 37b to the surface of the heat insulating layer 35 and connecting the two.

In step A1, for example, the heater layer 33 can be prepared by forming a heat generating resistor pattern on the surface of the protective layer 37b and laminating the protective layer 37a on the pattern (see FIG. 4 (3)). Specifically, the surface of the protective layer 37b can be plated and then etched to form a heat-generating resistor pattern having a desired shape.

In step A2, for example, a pulp slurry containing airgel is made into paper to prepare an airgel-containing paper, which can be used as a heat insulating layer 35. In step A3, the heater layer 33 is laminated on the connecting layer 31 so that the protective layer 37b and the connecting layer 31 are in contact with each other, and the heat insulating layer 35 is laminated adjacent to or close to the heater layer 33 to generate heat. The sex sheet 3 can be manufactured.

B) Aspect in which the protective layer is provided on the surface opposite to the connection layer side of the layer having the heat generation resistor FIG. 5 shows the protective layer 37 on the surface opposite to the connection layer 31 side of the layer 330 having the heat generation resistor. The aspect which comprises. In this embodiment, the connecting layer 31 serves to protect one surface of the layer 330 having the heating resistor. Therefore, when the layer 330 having the heat-generating resistor is the heat-generating resistor pattern itself, the connecting layer 31 is arranged from the entire surface of the layer 330 having the heat-generating resistor to the entire surface or a part of the surface of the heat insulating layer 35. Further, even when the layer 330 having the heat-generating resistor is a layer in which the heat-generating resistor pattern is formed on the base material having high heat resistance and the heat-generating resistor pattern is in contact with the protective layer 37, the heat-generating resistance is generated. In order to ensure the protection of the layer 330 having the body, the connecting layer 31 is arranged from the entire surface of the layer 330 having the heat generating resistor to the entire surface or a part of the surface of the heat insulating layer 35.

The heat-generating sheet of this embodiment can be produced, for example, by a method including the following steps.
Step B1 of preparing a layer 330 having a heat generating resistor and a heater layer 33 having a protective layer 37 on one surface of the layer.
Step B2 for preparing the heat insulating layer 35, and step B3 for arranging the connecting layer 31 from the surface of the layer 330 having the heat generating resistor to the surface of the heat insulating layer 35 and connecting the two.

Steps B1 and B2 can be carried out in the same manner as steps A1 and A2. In step B3, the heater layer 33 is laminated on the connecting layer 31 so that the layer 330 having the heat generating resistor and the connecting layer 31 are in contact with each other, and the heat insulating layer 35 is laminated adjacent to or close to the heater layer 33. By doing so, the heat-generating sheet 3 can be manufactured.

C) Aspect in which the connecting layer includes a protective layer FIG. 6 shows a mode in which the connecting layer 31 includes an adhesive layer 39 and a protective layer 37. In this embodiment, the protective layer 37 in the connecting layer 31 and the layer 330 having a heat generating resistor are in contact with each other. The connecting layer 31 is arranged from the entire surface of the layer 330 having the heat generating resistor to the entire surface or a part of the surface of the heat insulating layer 35.

In the heat-generating sheet of this embodiment, in step B3, a connecting layer 31 having an adhesive layer is used, and a heater layer 33 is laminated on the connecting layer 31 so that the protective layer 37 and the layer 330 having a heat-generating resistor come into contact with each other. Can be manufactured.

(2) Cylinder The heating unit of the present invention includes a cylinder 5 into which a flavor source can be inserted. The cross-sectional shape of the tubular body 5 is not limited, but may be a known shape such as a circle, an ellipse, a rectangle, a polygon, a rounded rectangle, or a rounded polygon. The cylinder 5 is hollow to allow the flavor source to be inserted, and at least one end is open. The thermal conductivity of the tubular body 5 is preferably 10 to 20 W / m / K, more preferably 14 to 16 W / m / K. From this point of view, the material of the tubular body 5 is preferably metal, more preferably stainless steel. The length and outer diameter of the tubular body 5 are as described above, and the wall thickness thereof is preferably 0.05 to 0.3 mm. The flavor source itself may be inserted into the cylinder 5, or the flavor source portion of the flavor suction article provided with the flavor source and a housing for holding the flavor source may be inserted.

(3) Flavor suction article The flavor suction article includes a flavor source. Tobacco raw materials are preferable as the flavor source. In one aspect, the flavor source is a tobacco rod with a tobacco filler and a wrapper that wraps around it. The tobacco filler is not limited, and for example, tobacco engraving, tobacco sheet, or the like can be used. Specifically, the wrapper may be filled with tobacco chopped from dried tobacco leaves. Alternatively, the dried tobacco leaves may be crushed and homogenized to be sheet-processed, and the cut tobacco leaves may be filled in the wrapper. The sheet may be gathered, folded, or spirally filled in the wrapper without being stamped. The sheet may be cut into strips and filled in the wrapper concentrically or so that the longitudinal direction of the strips is parallel to the longitudinal direction of the tobacco rod. Various tobacco leaves can be used, for example, yellow varieties, Burley varieties, Orient varieties, native varieties, other Nicotiana-Tabacam varieties, Nicotiana rustica varieties, and mixtures thereof. The flavor-sucking article may include a housing for holding the flavor source. As the housing, known ones such as a support member, a cooling member, and a filter member can be used.

By heating the flavor source of the flavor suction article of the present invention, a flavor or aerosol is generated. Therefore, the flavor source may generate steam with heating. It is preferable to include an aerosol source such as a polyol such as glycerin, propylene glycol or 1,3-butanediol in order to promote the generation of aerosol. The amount of the aerosol source added may be a known amount. The length of the tobacco rod is not limited, but is preferably 15 to 25 mm. The diameter is not limited, but is preferably 6 to 8 mm.

2. Manufacturing Method of Heating Unit The heating unit of the present invention includes a step of preparing a cylinder 5, a step of preparing a heat-generating sheet 3, and a step of winding the heat-generating sheet 3 around the peripheral surface of the cylinder 5 one or more turns. It is preferably manufactured by the method provided.

The cylinder 5 and the heat-generating sheet 3 can be prepared as described above. In the step of winding the heat-generating sheet 3 around the cylinder 5, it is preferable to use a connecting layer 31 having an adhesive layer and to fix the heat-generating sheet 3 after winding by utilizing the adhesiveness thereof. When the connecting layer 31 does not have an adhesive layer, a fixing tool such as a cap may be used to fix the heat-generating sheet 3 after winding.

4. Heating device for flavor-sucking articles The heating unit of the present invention is useful as a heating device for flavor-sucking articles. At that time, the heating unit of the present invention is connected to a power source. Units other than the heating unit in the heating device are configured as known. Further, the combination of the heating device and the flavor suction article is also referred to as a flavor suction system.

1 Heating unit 3 Heat-generating sheet 31 Connection layer 33 Heater layer 330 Layer containing heat-generating resistor 35 Insulation layer 37 Protective layer 39 Adhesive layer 5 Cylinder

Claims

A cylinder into which a flavor source can be inserted and
A heating unit equipped with a heat-generating sheet
The heat-generating sheet is
A heater layer having a heat generating resistor, a heat insulating layer having a heat insulating material, and
A connecting layer which is arranged from the surface of the heater layer to the surface of the heat insulating layer and connects the two in the longitudinal direction is provided.
The heat-generating sheet is wound around the outer peripheral surface of the cylinder one or more turns with the connection layer inside.
At least a part of the heat insulating layer is arranged radially outside the heater layer.
Heating unit.
The heating unit according to claim 1, wherein the heater layer is arranged on the outer side in the radial direction of the entire outer peripheral surface of the cylinder.
The heating unit according to claim 1 or 2, wherein the heater layer has a layer having a heat generating resistor and a protective layer arranged on at least one surface of the layer.
The heating unit according to any one of claims 1 to 3, wherein the connecting layer has an adhesive layer.
The heater layer has a layer having a heat generating resistor and a protective layer arranged on both surfaces of the layer.
The protective layer existing on the connecting layer side is arranged on the entire surface of the layer having the heat generating resistor.
The heating unit according to claim 3 or 4.
The heater layer has a layer having a heat generating resistor and a protective layer arranged on a surface opposite to the connection layer side of the layer.
The heating unit according to claim 3 or 4, wherein the connecting layer exists from the entire surface of the layer having the heat generating resistor to the entire surface or a part of the surface of the heat insulating layer.
The connecting layer has an adhesive layer and a protective layer for protecting the heat generating resistor arranged on the adhesive layer.
The heating unit according to claim 6, wherein the protective layer and the layer having the heat generating resistor are in contact with each other.
The process of preparing a cylinder into which a flavor source can be inserted,
A step of preparing a heat-generating sheet including a heater layer having a heat-generating resistor, a heat-insulating layer having a heat insulating material, and a connecting layer arranged from the surface of the heater layer to the surface of the heat-insulating layer and connecting the two in the longitudinal direction. A step of winding the heat-generating sheet around the outer peripheral surface of the cylinder one or more turns with the connection layer inside is provided.
The method for manufacturing a heating unit according to any one of claims 1 to 7.
A heater layer having a heat generating resistor, a heat insulating layer having a heat insulating material, and
A connecting layer which is arranged from the surface of the heater layer to the surface of the heat insulating layer and connects the two in the longitudinal direction is provided.
A heat-generating sheet for heating the flavor source.
The method for manufacturing a heat-generating sheet according to claim 9.
A step of preparing a heater layer having a layer having a heat generating resistor and a protective layer on both sides of the layer.
A step of preparing the heat insulating layer, and a step of arranging the connecting layer from the surface of the protective layer to the surface of the heat insulating layer to connect the heater layer and the heat insulating layer.
A manufacturing method comprising.
The method for manufacturing a heat-generating sheet according to claim 9.
A step of preparing a heater layer having a layer having a heat generating resistor and a protective layer on one side of the layer.
A step of preparing the heat insulating layer, and a step of arranging the connecting layer from the surface of the layer having the heat generating resistor to the surface of the heat insulating layer to connect the heater layer and the heat insulating layer.
A manufacturing method comprising.