Suction device, aerosol generation system, and electromagnetic induction source

Abstract

To improve the reliability of an electromagnetic induction source used for induction heating.SOLUTION: A suction device that inductively heats a base material including an aerosol source and generates an aerosol from the base material, the suction device comprising: a holding portion having a cylindrical shape and capable of accommodating the base material in an internal space of the cylindrical shape; An electromagnetic induction source that heats the aerosol source by the induction heating by the variable magnetic field, wherein the electromagnetic induction source is provided in a laminated structure of a first layer, a conductor layer that generates the variable magnetic field, and a second layer in order from a side surface side of the holding portion, and a thermal conductivity of the first layer is higher than a thermal conductivity of the second layer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an aerosol generating system and a method for manufacturing an aerosol generating system. [Background technology]

[0002] Inhalation devices, such as electronic cigarettes and nebulizers, which generate substances to be inhaled by users are widely used. The inhalation devices can generate aerosols imparted with flavor components by using an aerosol source for generating aerosols and a flavor source for imparting flavor components to the generated aerosols. The user can taste the flavor by inhaling the aerosols imparted with flavor components generated by the inhalation devices.

[0003] In recent years, suction devices that generate aerosol from an aerosol source by inductively heating a susceptor or the like that is thermally close to the aerosol source have been attracting attention. For example, Patent Document 1 listed below discloses a suction device that uses a coil formed on a film by printing for induction heating. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-127433 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the suction device disclosed in Patent Document 1, the reliability of the coil formed on the film was not sufficiently considered. For example, there was a possibility that cracks would occur in the coil due to repeated thermal expansion or contraction caused by induction heating.

[0006] Therefore, the present invention has been made in consideration of the above problems, and an object of the present invention is to provide a new and improved aerosol generation system and a method for manufacturing an aerosol generation system that can further improve the reliability of an electromagnetic induction source including a coil. [Means for solving the problem]

[0007] In order to solve the above problem, according to one aspect of the present invention, an aerosol generation system is provided, comprising: a holding section capable of accommodating a substrate containing an aerosol source in an internal space; and an electromagnetic induction source that generates a fluctuating magnetic field in the internal space using an alternating current and heats the aerosol source by induction heating due to the fluctuating magnetic field, wherein the electromagnetic induction source includes a first layer, a conductor layer provided on one surface of the first layer and generating the fluctuating magnetic field, and a second layer provided on the one surface of the first layer so as to cover the conductor layer.

[0008] The electromagnetic induction source may be provided on an outer periphery of the holding portion.

[0009] The electromagnetic induction source may be wound around the outer periphery of the holding portion in a cylindrical shape.

[0010] The electromagnetic induction source may be provided on the outer periphery of the holding portion with the first layer facing the holding portion.

[0011] The second layer may have a lower Young's modulus than the first layer.

[0012] The second layer on the conductive layer may have a thickness greater than a thickness of the first layer.

[0013] The organic resin constituting the first layer and the organic resin constituting the second layer may be the same.

[0014] The substrate may be heated from the inside by the induction heating, and the thermal conductivity of the first layer may be higher than the thermal conductivity of the second layer.

[0015] The first layer may include an inorganic insulating filler.

[0016] The second layer may have a higher thermal conductivity than the first layer.

[0017] The second layer may include an inorganic insulating filler.

[0018] The electromagnetic induction source may further include a heat diffusion layer provided on an outer surface of the second layer and thermally connected to the second layer.

[0019] The electromagnetic induction source may be wound around the outer periphery of the holding part in a cylindrical shape with the first layer on the inside, the thermal diffusion layer may extend in the axial direction of the cylindrical shape beyond the end of the first layer, and a cooling part for cooling the thermal diffusion layer may be provided in the extending region of the thermal diffusion layer.

[0020] The cooling portion may be provided in the extending region that extends in the axial direction of the cylindrical shape toward a side opposite to a side where an opening that communicates with the internal space of the holding portion is provided.

[0021] The cooling section may be provided on a surface of the extension region facing the second layer.

[0022] The cooling unit may include a Peltier element.

[0023] The electromagnetic induction source may further include a magnetic field converging layer made of a magnetic material and provided between the second layer and the thermal diffusion layer.

[0024] The conductor layer may form a transverse or solenoid coil.

[0025] The device may further include the base material housed in the internal space of the holding portion.

[0026] In addition, in order to solve the above problem, according to another aspect of the present invention, there is provided a method for manufacturing an aerosol generation system, which includes preparing a film-like first layer, forming a conductor layer on the first layer that generates a fluctuating magnetic field using an alternating current, forming a second layer on the first layer so as to cover the conductor layer, and providing a laminate including the first layer, the conductor layer, and the second layer in a holding section that can accommodate a substrate containing an aerosol source in its internal space. [Effects of the Invention]

[0027] As described above, according to the present invention, it is possible to further improve the reliability of an electromagnetic induction source including a coil. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a schematic diagram illustrating a configuration example of a suction device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view of a holding portion and an electromagnetic induction source. [Figure 3] FIG. 2 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source. [Figure 4] 3A and 3B are schematic diagrams showing examples of the shape of a coil formed by a conductor layer. [Figure 5] 10A and 10B are explanatory diagrams showing stresses that occur when an electromagnetic induction source is deformed. [Figure 6] 3 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a first specific example. FIG. [Figure 7] FIG. 10 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a second specific example. [Figure 8] FIG. 10 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a third specific example. [Figure 9] FIG. 10 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a fourth specific example. [Figure 10] FIG. 10 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a fifth specific example. [Figure 11]FIG. 10 is an enlarged cross-sectional view showing the vicinity of a conductor layer included in an electromagnetic induction source according to a sixth specific example. [Figure 12A] 1A to 1C are explanatory diagrams illustrating a process for manufacturing an electromagnetic induction source. [Figure 12B] 1A to 1C are explanatory diagrams illustrating a process for manufacturing an electromagnetic induction source. [Figure 12C] 1A to 1C are explanatory diagrams illustrating a process for manufacturing an electromagnetic induction source. [Figure 12D] 1A to 1C are explanatory diagrams illustrating a process for manufacturing an electromagnetic induction source. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant explanations will be omitted.

[0030] <1. Configuration of the suction device> First, a configuration example of a suction device according to one embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing a configuration example of a suction device 100 according to this embodiment.

[0031] As shown in FIG. 1, the suction device 100 includes, for example, a power supply unit 111, a sensor unit 112, a notification unit 113, a memory unit 114, a communication unit 115, a control unit 116, a susceptor 161, an electromagnetic induction source 162, and a holding unit 140.

[0032] The inhalation device 100 according to this embodiment performs induction heating (IH) on the stick-shaped substrate 150, which includes an aerosol source, while the stick-shaped substrate 150 is held in the holding unit 140. This atomizes the aerosol source contained in the stick-shaped substrate 150, thereby generating an aerosol from the stick-shaped substrate 150. The generated aerosol is inhaled by the user.

[0033] The inhalation device 100 and the stick-type substrate 150 work together to generate an aerosol that is inhaled by the user. Therefore, the combination of the inhalation device 100 and the stick-type substrate 150 may be considered as an aerosol generating system.

[0034] The power supply unit 111 accumulates power and supplies power to each component of the suction device 100. The power supply unit 111 may be configured with, for example, a rechargeable secondary battery such as a lithium-ion secondary battery. The power supply unit 111 may be charged by being connected to an external power supply via a USB (Universal Serial Bus) cable or the like. The power supply unit 111 may also be charged by a power transmission device that is not directly connected, using wireless power transmission technology. Furthermore, the power supply unit 111 may be provided detachably from the suction device 100, or may be provided so as to be replaceable with a new power supply unit 111.

[0035] The sensor unit 112 detects various information related to the suction device 100 and outputs the detected information to the control unit 116. As an example, the sensor unit 112 may be configured with a pressure sensor such as a condenser microphone, a flow rate sensor, or a temperature sensor. In such a case, when the sensor unit 112 detects a value associated with the user's suction, it can output information indicating that the user has performed suction to the control unit 116. As another example, the sensor unit 112 may be configured with an input device such as a button or switch that accepts information input from the user, and may be configured to include, for example, a button that instructs the start / stop of aerosol generation. In such a case, the sensor unit 112 can output information input by the user to the control unit 116. As another example, the sensor unit 112 may be configured with a temperature sensor that detects the temperature of the susceptor 161. The temperature sensor may detect the temperature of the susceptor 161 based on, for example, the electrical resistance value of the electromagnetic induction source 162. In such a case, the sensor unit 112 can detect the temperature of the stick-shaped substrate 150 held by the holder 140 based on the temperature of the susceptor 161 .

[0036] The notification unit 113 notifies the user of information. As an example, the notification unit 113 may be configured with a light-emitting device such as an LED (Light Emitting Diode). Accordingly, the notification unit 113 can emit light in different light-emitting patterns when the power supply unit 111 needs charging, when the power supply unit 111 is charging, when an abnormality has occurred in the suction device 100, and the like. The light-emitting pattern here is a concept that includes color, timing of turning on / off, and the like. The notification unit 113 may be configured with a display device that displays an image, a sound output device that outputs sound, a vibration device that vibrates, or the like, together with or instead of the light-emitting device. Additionally, the notification unit 113 may notify the user of information indicating that the user is ready to inhale. The information indicating that the user is ready to inhale is notified to the user, for example, when the temperature of the stick-shaped substrate 150, which has been heated by electromagnetic induction, reaches a predetermined temperature.

[0037] The storage unit 114 stores various types of information for the operation of the suction device 100. The storage unit 114 is configured, for example, with a non-volatile storage medium such as a flash memory. One example of the information stored in the storage unit 114 is information about the OS (Operating System) of the suction device 100, such as the control details of various components by the control unit 116. Another example of the information stored in the storage unit 114 is information about suction by the user, such as the number of suctions, the time of suction, or the cumulative suction time.

[0038] The communication unit 115 is a communication interface for transmitting and receiving information between the suction device 100 and other devices. The communication unit 115 can perform communication in accordance with any wired or wireless communication standard. Examples of such communication standards include wireless LAN (Local Area Network), wired LAN, Wi-Fi (registered trademark), and Bluetooth (registered trademark). As one example, the communication unit 115 may transmit information about the user's suction to a smartphone to display the information about the user's suction on the smartphone. As another example, the communication unit 115 may receive new OS information from a server to update the OS information stored in the storage unit 114.

[0039] The control unit 116 functions as an arithmetic processing unit and a control unit, and controls the overall operation of the suction device 100 in accordance with various programs. The control unit 116 may be realized by an electronic circuit such as a CPU (Central Processing Unit) or a microprocessor. The control unit 116 may also be configured to include a ROM (Read Only Memory) that stores the programs to be used, calculation parameters, etc., and a RAM (Random Access Memory) that temporarily stores parameters that change as appropriate.

[0040] Specifically, the control unit 116 may control the execution of various processes related to the operation of the suction device 100. For example, the control unit 116 may control the execution of processes such as power supply from the power supply unit 111 to the other components, charging of the power supply unit 111, detection of information by the sensor unit 112, notification of information by the notification unit 113, storage or reading of information by the memory unit 114, and transmission and reception of information by the communication unit 115. The control unit 116 can also control the input of information to each component and the execution of processes based on information output from each component, which are executed by the suction device 100.

[0041] The holding part 140 has an internal space 141, and holds the stick-shaped substrate 150 by accommodating a portion of the stick-shaped substrate 150 in the internal space 141. The holding part 140 has an opening 142 that connects the internal space 141 to the outside, and holds the stick-shaped substrate 150 inserted into the internal space 141 through the opening 142. For example, the holding part 140 may be configured in a cylindrical shape that defines the columnar internal space 141, with the opening 142 and the bottom part 143 as its bottom surface. The holding part 140 is configured so that the inner diameter is smaller than the outer diameter of the stick-shaped substrate 150 in at least a portion of the height direction of the cylindrical body, and can thereby hold the stick-shaped substrate 150 inserted into the internal space 141 by compressing it from the outer periphery.

[0042] The holder 140 also has the function of defining an air flow path that passes through the stick-shaped substrate 150. An air inlet, which is the entrance of air into the flow path, is located, for example, in the bottom 143. On the other hand, an air outlet, which is the exit of air from the flow path, is the opening 142.

[0043] The stick-shaped substrate 150 is a stick-shaped member. The stick-shaped substrate 150 includes a substrate portion 151 and a mouthpiece portion 152.

[0044] The substrate 151 includes an aerosol source. The aerosol source is atomized by heating to generate an aerosol. The aerosol source may be, for example, a tobacco-derived processed product, or a processed product obtained by forming shredded tobacco or tobacco raw materials into granules, sheets, or powder. The aerosol source may also include non-tobacco-derived components produced from plants other than tobacco (e.g., mint and herbs). For example, the aerosol source may include a flavoring component. When the inhalation device 100 is a medical inhaler, the aerosol source may include a drug to be inhaled by the patient. The aerosol source is not limited to solids and may be, for example, a polyhydric alcohol such as glycerin or propylene glycol, or a liquid such as water. At least a portion of the substrate 151 is accommodated in the internal space 141 of the holder 140 when the stick-shaped substrate 150 is held in the holder 140.

[0045] Suction mouth part 152 is a member that is held in the user's mouth when inhaling. At least a portion of suction mouth part 152 protrudes from opening 142 when stick-shaped substrate 150 is held in holding part 140. When the user holds suction mouth part 152 protruding from opening 142 in their mouth and inhales, air flows into the inside of holding part 140 through an air inlet hole (not shown). The inflowing air passes through internal space 141 of holding part 140 (i.e., substrate part 151) and reaches the user's mouth together with the aerosol generated from substrate part 151.

[0046] The stick-shaped substrate 150 also includes a susceptor 161. The susceptor 161 can generate heat by electromagnetic induction. The susceptor 161 may be made of a conductive material. For example, the susceptor 161 may be a metal piece.

[0047] Specifically, the susceptor 161 may be disposed in thermal proximity to the aerosol source. The term "thermal proximity of the susceptor 161 to the aerosol source" means that the susceptor 161 is disposed at a position where heat generated in the susceptor 161 can be transferred to the aerosol source. For example, the susceptor 161 may be included in the base portion 151 together with the aerosol source so that the susceptor 161 is surrounded by the aerosol source. With this configuration, the susceptor 161 can efficiently heat the aerosol source with the generated heat.

[0048] The susceptor 161 may be provided so as not to be accessible from the outside of the stick-shaped substrate 150. For example, the susceptor 161 may be arranged only in the center of the stick-shaped substrate 150, rather than being arranged near the outer periphery of the stick-shaped substrate 150.

[0049] The electromagnetic induction source 162 heats the susceptor 161 by electromagnetic induction. When an alternating current is supplied from the power supply unit 111 to the electromagnetic induction source 162, the electromagnetic induction source 162 can generate a fluctuating magnetic field at a position overlapping with the internal space 141 of the holder 140. The electromagnetic induction source 162 generates a fluctuating magnetic field while the stick-shaped substrate 150 is housed in the holder 140, thereby generating an eddy current in the susceptor 161 and generating Joule heat in the susceptor 161. The Joule heat generated in the susceptor 161 can generate an aerosol by heating an aerosol source included in the stick-shaped substrate 150. The specific configuration of the electromagnetic induction source 162 will be described later.

[0050] For example, when the sensor unit 112 detects that a predetermined user input has been made, the inhalation device 100 may generate an aerosol by supplying power to the electromagnetic induction source 162 and inductively heating the aerosol source included in the stick-shaped substrate 150. When the temperature of the aerosol source reaches a predetermined temperature, the inhalation device 100 allows the user to inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, the inhalation device 100 may stop supplying power to the electromagnetic induction source 162.

[0051] As another example, the inhalation device 100 may supply power to the electromagnetic induction source 162 and generate an aerosol while the sensor unit 112 detects that the user is inhaling.

[0052] 1 shows an example in which the susceptor 161 is included in the base portion 151 of the stick-shaped substrate 150, but the suction device 100 is not limited to this example. For example, the holder 140 may function as the susceptor 161. In such a case, the suction device 100 generates Joule heat in the holder 140 by generating an eddy current in the holder 140 using a magnetic field generated by the electromagnetic induction source 162. This allows the suction device 100 to heat and atomize the aerosol source included in the base portion 151 using the Joule heat generated in the holder 140, thereby generating an aerosol from the stick-shaped substrate 150.

[0053] <2. Configuration of electromagnetic induction source> (2.1. Basic configuration) Next, electromagnetic induction source 162 included in suction device 100 will be described with reference to Figs. 2 to 5. Fig. 2 is a schematic cross-sectional view of holding unit 140 and electromagnetic induction source 162. Fig. 3 is an enlarged cross-sectional view showing the vicinity of conductor layer 623 included in electromagnetic induction source 162. Fig. 4 is a schematic diagram showing an example of the shape of a coil formed by conductor layer 623. Fig. 5 is an explanatory diagram showing stress generated when electromagnetic induction source 162 is deformed.

[0054] 2 and 3, electromagnetic induction source 162 is provided along the side surface of holding portion 140, which has opening 142 and bottom portion 143 as its bottom surface and defines columnar internal space 141. Electromagnetic induction source 162 is provided in a layered structure of first layer 621, conductor layer 623, and second layer 622, arranged from the side surface side of holding portion 140.

[0055] However, the electromagnetic induction source 162 does not have to be provided along the side surface of the holder 140 as long as it can inductively heat the susceptor 161. For example, the susceptor 161, which is thermally close to the aerosol source, may be provided within the internal space 141 of the holder 140, or may be provided so as to define the internal space 141 of the holder 140. Therefore, as an example, the electromagnetic induction source 162 may be provided on the internal surface of the housing (casing) of the suction device 100, at a position where the internal space 141 of the holder 140 can be inductively heated. As another example, the electromagnetic induction source 162 may be provided on a support (not shown) provided between the external surface of the holder 140 and the internal surface of the housing (casing) of the suction device 100. The support may be provided, for example, parallel to the external surface of the holder 140 and the internal surface of the housing of the suction device 100, and the electromagnetic induction source 162 may be provided on the internal surface or external surface of the support.

[0056] The first layer 621 is made of a film of an organic resin having electrical insulation and flexibility, and is wound into a cylindrical shape along the side of the holding portion 140. The first layer 621 may be made of a super engineering plastic such as polyimide (PI) or polyetheretherketone (PEEK). The first layer 621 is made of a super engineering plastic that has high heat resistance among organic resins, because the first layer 621 comes into contact with the conductor layer 623 that generates heat when an alternating current is supplied thereto.

[0057] The conductor layer 623 is made of a conductive material and is provided on the outer surface of the first layer 621. Specifically, the conductor layer 623 is a wiring layer to which an alternating current is supplied and is wired on the outer surface of the first layer 621 to function as a coil. For example, the conductor layer 623 may be wired in a rectangular spiral shape on the side surface of the holding unit 140 as shown in FIG. 3 to form a transverse coil. Alternatively, the conductor layer 623 may be wired in a spiral shape that three-dimensionally wraps around the side surface of the holding unit 140 to form a solenoid coil. The conductor layer 623 may be made of a metal material such as silver, copper, gold, or aluminum. For example, the conductor layer 623 may be formed of a silver nanoparticle ink, which allows for easy formation of wiring patterns on a film-like substrate.

[0058] The second layer 622 is made of an organic resin having electrical insulation properties and flexibility, and is provided on the outer surface of the first layer 621 so as to cover the conductor layer 623. The second layer 622 may be made of a super engineering plastic such as polyimide (PI) or polyetheretherketone (PEEK). The second layer 622 is made of a super engineering plastic that has high heat resistance among organic resins, because the second layer 622 comes into contact with the conductor layer 623 that generates heat when an alternating current is supplied thereto.

[0059] The first layer 621 and the second layer 622 may be made of the same organic resin or different organic resins. However, if the first layer 621 and the second layer 622 are made of the same or the same organic resin, the adhesion between the layers can be further improved. If the first layer 621 and the second layer 622 are made of the same or the same organic resin, the properties of the first layer 621 and the second layer 622 can be controlled by, for example, an additive or filler mixed into the first layer 621 and the second layer 622, respectively.

[0060] When the first layer 621 and the second layer 622 are made of the same or the same organic resin, the first layer 621 and the second layer 622 may be mixed at the interface, and the interface between the first layer 621 and the second layer 622 may not be clear. Even in such a case, it can be understood that the electromagnetic induction source 162 is made up of the first layer 621 and the second layer 622 due to the difference in the characteristics of each layer.

[0061] Electromagnetic induction source 162 having the above-described configuration is configured so that conductor layer 623 is sandwiched between flexible first layer 621 and second layer 622. As a result, first layer 621 and second layer 622 can suppress volume fluctuation of conductor layer 623 due to heat generation when AC current is supplied, and therefore, generation of cracks or the like in conductor layer 623 can be suppressed.

[0062] 5, when the electromagnetic induction source 162 is wound around the side surface of the holder 140, a compressive stress is generated on the inside of the wound portion (i.e., the first layer 621 side), and a tensile stress is generated on the outside of the wound portion (i.e., the second layer 622 side). In the conductor layer 623, the inside of the wound portion is covered with the first layer 621, and the outside of the wound portion is covered with the second layer 622. This makes it possible for the electromagnetic induction source 162 to suppress deformation of the conductor layer 623 due to the compressive stress and tensile stress, and therefore to suppress peeling of the conductor layer 623 from the first layer 621, breakage of the conductor layer 623, and the like.

[0063] In particular, in recent years, the diameter of the internal space of the holding unit 140 has become smaller in order to further reduce the size of the suction device 100. Therefore, in the case of the electromagnetic induction source 162 that is wound around the side surface of the holding unit 140 having a smaller diameter (for example, a diameter of 7 mm), the radius of curvature of the winding becomes smaller, and therefore the compressive stress and tensile stress that are generated become larger. The above-mentioned electromagnetic induction source 162 can suppress deformation of the conductor layer 623 due to the compressive stress and tensile stress, and therefore can be suitably used for the miniaturized suction device 100.

[0064] In the above description, the electromagnetic induction source 162 is configured to be wound in a cylindrical shape along the side surface of the holding unit 140, with the first layer 621 facing the side surface of the holding unit 140. However, the technology according to the present invention is not limited to the above example. For example, the electromagnetic induction source 162 may be provided in a rectangular sheet shape and attached to a partial region of the side surface of the holding unit 140 via an adhesive or the like. Furthermore, when provided in a rectangular sheet shape, the electromagnetic induction source 162 may be attached to the inner surface of the housing (casing) of the suction device 100, or may be attached to the inner surface or outer surface of a support provided between the holding unit 140 and the suction device 100.

[0065] (2.2. Detailed Configuration) Next, a more detailed configuration of the electromagnetic induction source 162 will be described with reference to Fig. 6 to Fig. 11. The electromagnetic induction source 162 can obtain more preferable effects by adopting the configurations described in the following first to sixth specific examples.

[0066] (2.2.1. First Specific Example) 6 is an enlarged cross-sectional view showing the vicinity of the conductor layer 623 included in the electromagnetic induction source 162 according to the first specific example. As shown in FIG. 6, the thickness t2 of the second layer 622 covering the conductor layer 623 may be thicker than the thickness t1 of the first layer 621.

[0067] When the electromagnetic induction source 162 is wound around the side surface of the holding unit 140, the compressive stress and tensile stress generated are greater than the compressive stress. Therefore, in the conductor layer 623, the conductor layer 623 is more likely to break due to the tensile stress than to peel off due to the compressive stress. Therefore, in the first specific example, by making the film thickness t2 of the second layer 622 covering the conductor layer 623 thicker than the film thickness t1 of the first layer 621, it is possible to more effectively suppress deformation caused by the tensile stress generated on the outer side of the conductor layer 623 (i.e., the second layer 622 side). Therefore, according to the first specific example, the electromagnetic induction source 162 can more effectively suppress damage to the conductor layer 623 that occurs when the electromagnetic induction source 162 is wound around the side surface of the holding unit 140.

[0068] (2.2.2. Second Specific Example) 7 is an enlarged cross-sectional view showing the vicinity of a conductor layer 623 included in an electromagnetic induction source 162 according to a second specific example. As shown in FIG. 7, a first layer 621 and a second layer 622 may be provided as layers having different properties. For example, the Young's modulus of the second layer 622 may be lower than the Young's modulus of the first layer 621.

[0069] Conductor layer 623 is covered with second layer 622, which has a lower Young's modulus and is more flexible than first layer 621, and thereby can prevent residual stress caused by thermal expansion or thermal contraction from occurring inside. Therefore, according to the second specific example, electromagnetic induction source 162 can prevent breakage, cracks, or the like from occurring in conductor layer 623 due to residual stress caused by thermal expansion or thermal contraction of conductor layer 623.

[0070] The Young's modulus of the first layer 621 and the second layer 622 can be controlled, for example, by the type or degree of polymerization of the organic resin constituting the first layer 621 and the second layer 622, or the type or amount of an additive mixed therein. For example, the first layer 621 and the second layer 622 may be composed of the same or identical organic resin, and the Young's modulus may be controlled by changing the degree of polymerization of the organic resin or the type or amount of an additive mixed therein. In such a case, the first layer 621 and the second layer 622 can suppress the generation of residual stress in the conductor layer 623 while improving the adhesion between the layers.

[0071] (2.2.3. Third Specific Example) 8 is an enlarged cross-sectional view showing the vicinity of a conductor layer 623 included in an electromagnetic induction source 162 according to a third specific example. As shown in Fig. 8, a first layer 621 and a second layer 622 may be provided as layers having different properties. For example, the thermal conductivity of the first layer 621 may be higher than the thermal conductivity of the second layer 622.

[0072] When the thermal conductivity of the first layer 621 is higher than that of the second layer 622, heat generated in the conductor layer 623 by the supply of AC current diffuses mainly toward the first layer 621, not toward the second layer 622. Therefore, the first layer 621 can increase the surface temperature of the internal space 141 of the holding unit 140 by the heat diffused from the conductor layer 623 toward the first layer 621. Accordingly, in the central heating suction device 100 that inductively heats the stick-shaped substrate 150 from the inside, the surface temperature of the internal space 141 of the holding unit 140 and the temperature of the stick-shaped substrate 150 housed in the internal space 141 become closer to each other. Therefore, according to the third specific example, the central heating suction device 100 can suppress condensation on the surface of the internal space 141.

[0073] The thermal conductivity of the first layer 621 and the second layer 622 can be controlled, for example, by whether or not a thermally conductive filler is mixed into the first layer 621 and the second layer 622, or by the type or amount of the thermally conductive filler to be mixed. For example, in a third specific example, no thermally conductive filler may be mixed into the second layer 622, but a thermally conductive filler may be mixed into the first layer 621. As the thermally conductive filler, an inorganic insulating filler (e.g., ceramics) such as alumina (Al2O3), magnesium oxide (MgO), boron nitride (BN), silica (SiO2), or aluminum nitride (AlN) can be used.

[0074] (2.2.4. Fourth Specific Example) 9 is an enlarged cross-sectional view showing the vicinity of a conductor layer 623 included in an electromagnetic induction source 162 according to a fourth specific example. As shown in FIG. 9, a first layer 621 and a second layer 622 may be provided as layers having different properties. For example, the thermal conductivity of the second layer 622 may be higher than the thermal conductivity of the first layer 621.

[0075] When the thermal conductivity of second layer 622 is higher than that of first layer 621, heat generated in conductor layer 623 by the supply of AC current is mainly diffused toward second layer 622, not toward first layer 621. Therefore, second layer 622 can release the heat generated in conductor layer 623 by the supply of AC current from second layer 622 to the outside of electromagnetic induction source 162. Therefore, according to the fourth specific example, electromagnetic induction source 162 can prevent conductor layer 623 from being damaged by heat or the resistance value of conductor layer 623 from increasing.

[0076] The thermal conductivity of the first layer 621 and the second layer 622 can be controlled, for example, by whether or not a thermally conductive filler is mixed into the first layer 621 and the second layer 622, or by the type or amount of the thermally conductive filler to be mixed. For example, in a fourth specific example, no thermally conductive filler may be mixed into the first layer 621, but a thermally conductive filler may be mixed into the second layer 622. As the thermally conductive filler, an inorganic insulating filler (e.g., ceramics) such as alumina (Al2O3), magnesium oxide (MgO), boron nitride (BN), silica (SiO2), or aluminum nitride (AlN) can be used.

[0077] (2.2.5. Fifth Specific Example) 10 is an enlarged cross-sectional view showing the vicinity of the conductor layer 623 included in the electromagnetic induction source 162 according to the fifth specific example. As shown in Fig. 10, the electromagnetic induction source 162 according to the fifth specific example further includes a thermal diffusion layer 625 provided on the outer surface of the second layer 622 in addition to the configuration of the electromagnetic induction source 162 according to the fourth specific example.

[0078] The thermal diffusion layer 625 is thermally connected to the second layer 622, and can diffuse heat generated in the conductor layer 623 by the supply of AC current further outward from the second layer 622. Specifically, because the thermal conductivity of the second layer 622 is higher than that of the first layer 621, the heat generated in the conductor layer 623 by the supply of AC current diffuses mainly toward the second layer 622, not toward the first layer 621. The heat diffused to the second layer 622 is further diffused to the thermal diffusion layer 625 provided on the outer surface of the second layer 622, and is thereby released to the outside of the electromagnetic induction source 162. This allows the electromagnetic induction source 162 to further prevent the conductor layer 623 from being damaged by heat or the resistance value of the conductor layer 623 from increasing.

[0079] The thermal diffusion layer 625 may be formed in a sheet shape from a metal material such as copper or aluminum, which has high thermal conductivity. When the thermal diffusion layer 625 is formed from a metal material, the thermal diffusion layer 625 can also function as a magnetic shield that blocks the fluctuating magnetic field generated by the coil formed by the conductor layer 623. This allows the electromagnetic induction source 162 to reduce the possibility that the magnetic field generated by the coil formed by the conductor layer 623 will affect other components of the suction device 100, such as the control unit 116.

[0080] However, in order to more efficiently shield the fluctuating magnetic field generated by the coil formed by the conductor layer 623, a magnetic field convergence layer may be further provided between the thermal diffusion layer 625 and the second layer 622. The magnetic field convergence layer is made of a soft magnetic material with high relative permeability, such as soft iron, silicon steel, or soft ferrite. The magnetic field convergence layer absorbs the magnetic flux generated by the coil formed by the conductor layer 623, thereby preventing the magnetic field generated by the conductor layer 623 from leaking outside the electromagnetic induction source 162. This allows the electromagnetic induction source 162 to further reduce the possibility that the magnetic field generated by the conductor layer 623 will affect other components of the suction device 100, such as the control unit 116.

[0081] (2.2.6. Sixth Specific Example) 11 is an enlarged cross-sectional view showing the vicinity of a conductor layer 623 included in an electromagnetic induction source 162 according to the sixth specific example. As shown in Fig. 11, the electromagnetic induction source 162 according to the sixth specific example further includes a cooling unit 626 that cools the thermal diffusion layer 625, in addition to the configuration of the electromagnetic induction source 162 according to the fifth specific example.

[0082] The cooling unit 626 is thermally connected to the thermal diffusion layer 625 and actively removes heat generated in the conductor layer 623 by the supply of AC current from the electromagnetic induction source 162. The cooling unit 626 may include, for example, a Peltier element. Specifically, because the thermal conductivity of the second layer 622 is higher than that of the first layer 621, heat generated in the conductor layer 623 by the supply of AC current is primarily diffused toward the second layer 622, not toward the first layer 621. The heat diffused to the second layer 622 is further diffused to the thermal diffusion layer 625 provided on the outer surface of the second layer 622, and then cooled by the cooling unit 626. This allows the electromagnetic induction source 162 to prevent the heat diffused to the thermal diffusion layer 625 from unintentionally heating other components. Furthermore, the electromagnetic induction source 162 can more efficiently remove the heat generated in the conductor layer 623.

[0083] The cooling unit 626 may be provided, for example, in an extending region 625E of the thermal diffusion layer 625. The extending region 625E is, for example, a region of the thermal diffusion layer 625 extending in the axial direction of the cylindrical shape of the first layer 621, which extends further than the end of the first layer 621 on the side opposite to the side where the opening 142 communicating with the internal space 141 of the holding unit 140 is provided. The cooling unit 626 may also be provided, for example, on the inner surface of the thermal diffusion layer 625 (i.e., the surface where the second layer 622 is provided). When provided in such a position, the cooling unit 626 can be provided without increasing the size of the suction device 100.

[0084] However, it goes without saying that the cooling section 626 may be provided at any position that is thermally connected to the thermal diffusion layer 625 .

[0085] (2.3. Manufacturing method) 12A to 12D, a method for manufacturing the electromagnetic induction source 162 will be described.

[0086] First, as shown in FIG. 12A, a film-like first layer 621 made of polyimide (PI) or polyether ether ketone (PEEK) is prepared.

[0087] 12B, a conductor layer 623 made of a metal material such as silver, copper, gold, or aluminum is formed on the first layer 621. The conductor layer 623 may be patterned into, for example, a rectangular spiral shape to form a transverse coil.

[0088] The conductor layer 623 may be formed by applying and patterning by printing, or by forming a film by vapor deposition and then patterning by photolithography and etching. For example, the conductor layer 623 may be formed by applying a conductive ink (e.g., silver nanoparticle ink) onto the first layer 621 by inkjet printing while patterning it, and then curing the applied conductive ink with heat or ultraviolet light.

[0089] 12C, a second layer 622 is formed on the first layer 621 and the conductor layer 623. The second layer 622 may be formed, for example, by applying a melt of an organic resin such as polyimide (PI) or polyether ether ketone (PEEK) onto the first layer 621 so as to cover the conductor layer 623, and then curing the melt.

[0090] 12D , the laminate of the first layer 621, the conductor layer 623, and the second layer 622 is wound into a cylindrical shape to form the electromagnetic induction source 162. Specifically, the laminate of the first layer 621, the conductor layer 623, and the second layer 622 is wound along the side surface of the holding unit 140 so that the first layer 621 faces the holding unit 140, to form the electromagnetic induction source 162. At this time, the holding unit 140 and the first layer 621 may be bonded by interposing a heat-resistant adhesive layer between the holding unit 140 and the first layer 621, or may be bonded by applying an adhesive to the inner surface of the first layer 621.

[0091] The electromagnetic induction source 162 manufactured by the above steps can suppress the occurrence of cracks in the conductor layer 623 due to heat generation, and can also suppress breakage or peeling of the conductor layer 623 when wound into a cylindrical shape. Therefore, the electromagnetic induction source 162 can improve the reliability of the suction device 100.

[0092] Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention pertains can conceive of various modifications and alterations within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

[0093] However, the present invention is not limited to the above embodiment. For example, the above-described electromagnetic induction source 162 can also be used as a film heater by causing the conductor layer 623 to function as a heating wire. In such a case, the suction device 100 can heat the stick-shaped substrate 150 by resistance heating rather than induction heating. Therefore, the present invention can be applied not only to induction heating suction devices but also to resistance heating suction devices, and improving the reliability of the film heater can improve the reliability of the suction device.

[0094] The following configurations also fall within the technical scope of the present invention. (1) a holder capable of accommodating a substrate containing an aerosol source in an internal space; an electromagnetic induction source that generates a fluctuating magnetic field in the internal space using an alternating current and heats the aerosol source by induction heating caused by the fluctuating magnetic field; Equipped with The electromagnetic induction source is The first layer and a conductor layer provided on one surface of the first layer and generating the varying magnetic field; a second layer provided on the one surface of the first layer so as to cover the conductor layer; 1. An aerosol generating system comprising: (2) The aerosol generation system described in (1) above, wherein the electromagnetic induction source is provided on the outer periphery of the holding portion. (3) The aerosol generation system described in (2) above, wherein the electromagnetic induction source is wound in a cylindrical shape around the outer periphery of the holding part. (4) The aerosol generation system described in (2) or (3) above, wherein the electromagnetic induction source is provided on the outer periphery of the holding portion with the first layer facing the holding portion. (5) The aerosol generation system according to any one of (1) to (4) above, wherein the Young's modulus of the second layer is lower than the Young's modulus of the first layer. (6) The aerosol generation system according to any one of (1) to (5) above, wherein the thickness of the second layer on the conductor layer is greater than the thickness of the first layer. (7) The aerosol generating system according to any one of (1) to (6) above, wherein the organic resin constituting the first layer and the organic resin constituting the second layer are the same. (8) The substrate is heated from the inside by the induction heating, The aerosol generation system according to any one of (1) to (7) above, wherein the thermal conductivity of the first layer is higher than the thermal conductivity of the second layer. (9) The aerosol generating system described in (8) above, wherein the first layer contains an inorganic insulating filler. (10) The aerosol generation system according to any one of (1) to (7) above, wherein the thermal conductivity of the second layer is higher than the thermal conductivity of the first layer. (11) The aerosol generating system described in (10) above, wherein the second layer contains an inorganic insulating filler. (12) The aerosol generation system described in (10) or (11) above, wherein the electromagnetic induction source further includes a thermal diffusion layer provided on the outer surface of the second layer and thermally connected to the second layer. (13) the electromagnetic induction source is wound around the outer periphery of the holding part in a cylindrical shape with the first layer on the inside, the thermal diffusion layer extends beyond the end of the first layer in the axial direction of the cylindrical shape; The aerosol generation system described in (12) above, wherein a cooling section for cooling the thermal diffusion layer is provided in the extending area of ​​the thermal diffusion layer. (14) The aerosol generation system described in (13) above, wherein the cooling section is provided in the extension area extending in the axial direction of the cylindrical shape toward the side opposite to the side on which an opening leading to the internal space of the holding section is provided. (15) The aerosol generation system described in (13) or (14) above, wherein the cooling section is provided on the surface of the extension region facing the second layer. (16) The aerosol generation system according to any one of (13) to (15) above, wherein the cooling unit includes a Peltier element. (17) The aerosol generation system described in any one of (12) to (16) above, wherein the electromagnetic induction source further includes a magnetic field converging layer disposed between the second layer and the thermal diffusion layer and made of a magnetic material. (18) The aerosol generation system according to any one of (1) to (17) above, wherein the conductor layer constitutes a transverse or solenoid coil. (19) The aerosol generation system according to any one of (1) to (18) above, further comprising the substrate housed in the internal space of the holding part. (20) Providing a first layer in the form of a film; forming a conductor layer on the first layer that generates a varying magnetic field by an alternating current; forming a second layer on the first layer so as to cover the conductor layer; providing a laminate including the first layer, the conductor layer, and the second layer in a holder capable of accommodating a substrate containing an aerosol source in an internal space thereof; A method for producing an aerosol generating system, comprising: [Explanation of symbols]

[0095] 100 Suction device 111 Power supply section 112 Sensor unit 113 Notification Department 114 Storage section 115 Communications Department 116 Control Unit 140 Holding part 141 Interior Space 142 Aperture 143 Bottom 150 Stick-type base material 151 Base material part 152 Mouthpiece 161 Susceptor 162 Electromagnetic induction source 621 1st layer 622 2nd layer 623 Conductor Layer 625 Thermal diffusion layer 625E extension area 626 Cooling section

Claims

1. 1. An aspiration device for inductively heating a substrate containing an aerosol source and generating an aerosol from the substrate, comprising: a holding portion having a cylindrical shape and capable of accommodating the substrate in an internal space of the cylindrical shape; an electromagnetic induction source that generates a fluctuating magnetic field in the internal space using an alternating current and heats the aerosol source by induction heating caused by the fluctuating magnetic field; Equipped with the electromagnetic induction source has a laminated structure including, in order from a side surface of the holding part, a first layer, a conductor layer that generates the varying magnetic field, and a second layer, The first layer has a higher thermal conductivity than the second layer.

2. The suction device of claim 1 , wherein the first layer is provided in a cylindrical shape.

3. The suction device according to claim 2 , wherein the conductive layer is provided on an outer surface of the cylindrical shape of the first layer.

4. 4. The suction device according to claim 1, wherein the holding portion functions as a susceptor that generates heat by the induction heating caused by the varying magnetic field.

5. 5. The suction device according to claim 1, wherein the second layer on the conductor layer has a thickness greater than the thickness of the first layer.

6. The suction device according to any one of claims 1 to 5, wherein the first layer is made of polyetheretherketone (PEEK).

7. The suction device according to any one of claims 1 to 6, further comprising a magnetic shield provided on an outer surface of the second layer to block the varying magnetic field.

8. The suction device according to any one of claims 1 to 7, wherein the conductor layer is made of a metal material.

9. The suction device of claim 8 , wherein the conductive layer is made of copper.

10. The suction device according to any one of claims 1 to 9, wherein the conductor layer forms a transverse or solenoid coil.

11. a substrate including an aerosol source; a holding portion having a cylindrical shape and capable of accommodating the substrate in an internal space of the cylindrical shape; an electromagnetic induction source that generates a fluctuating magnetic field in the internal space using an alternating current and heats the aerosol source by induction heating caused by the fluctuating magnetic field; Equipped with the electromagnetic induction source has a laminated structure including, in order from a side surface of the holding part, a first layer, a conductor layer that generates the varying magnetic field, and a second layer, An aerosol generation system, wherein the thermal conductivity of the first layer is higher than the thermal conductivity of the second layer.

12. An electromagnetic induction source that generates a fluctuating magnetic field using an alternating current in a cylindrical internal space of a cylindrical holding part, and heats an aerosol source contained in a substrate accommodated in the internal space by induction heating using the fluctuating magnetic field, The holding portion is configured by laminating a first layer, a conductor layer that generates the fluctuating magnetic field, and a second layer in this order from a side surface side of the holding portion, The first layer has a higher thermal conductivity than the second layer.

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