# US 12,120,755 B2 · Aerosol generating device with inductive coil surrounding an inner wall with a body heated by the coil and system using the same and method of manufacturing thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,755 B2 - Document ID: US12120755B2 - Status: Granted - Kind: B2 - Application number: 16/971,041 - Filed: 2020-03-05 - Published: 2020-12-17 - Granted: 2024-10-15 - Earliest claimed: 2019-03-05 - Assignees: Kt&G Corporation - Applicants: Kt&G Corporation - Inventors: Hwi Kyeong An; Sang Kyu Park; Seung Won Lee - Web page: https://patentgrep.com/patent/US12120755B2 ## CPC - H04W 48/16: Discovering, processing access restriction or access information - H04W 76/11: Allocation or use of connection identifiers - A24F 40/20: Devices using solid inhalable precursors - A24F 40/465: specially adapted for induction heating - A24F 40/50: Control or monitoring - A24F 40/51: Arrangement of sensors - A24F 40/70: Manufacture - H04W 12/037: of the control plane, e.g. signalling traffic - H05B 6/10: Induction heating apparatus, other than furnaces, for specific applications - H05B 6/101: {for local heating of metal pieces} - H05B 6/108: {for heating a fluid} - H05B 6/36: Coil arrangements - H05B 6/365: {using supplementary conductive or ferromagnetic pieces} - A24F 40/40: Constructional details, e.g. connection of cartridges and battery parts - A24F 40/46: Shape or structure of electric heating means - A24F 40/53: Monitoring, e.g. fault detection - A24F 40/57: Temperature control - B22F 7/062: {involving the connection or repairing of preformed parts} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 24/02: Arrangements for optimising operational condition - H04W 48/12: using downlink control channel - H04W 84/12: WLAN [Wireless Local Area Networks] - H05B 6/38: specially adapted for fitting into hollow spaces of workpieces - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER ## Abstract Provided is an aerosol generating device for heating a cigarette to generate aerosol, the aerosol generating device includes an inner wall configured to form an accommodating space for accommodating at least a portion of the cigarette; a coil provided outside the inner wall, surrounding at least a portion of the accommodating space, and configured to generate an induced magnetic field; a heating body provided in the accommodating space and comprising a ferromagnetic substance that generates heat by the induced magnetic field; and a supporting portion configured to support the heating body and integrally molded with the heating body, wherein the inner wall supports the supporting portion and is integrally molded with the supporting portion. ## Claims ### Claim 1 An aerosol generating device for heating a cigarette to generate aerosol, the aerosol generating device comprising: an inner wall configured to form an accommodating space for accommodating at least a portion of the cigarette; a coil provided outside the inner wall, surrounding at least a portion of the accommodating space, and configured to generate an induced magnetic field; a heating body provided in the accommodating space and comprising a ferromagnetic substance that generates heat by the induced magnetic field; a supporting portion supporting the heating body and integrally molded with the heating body; and an outer wall provided outside the inner wall and spaced apart from the inner wall, wherein the inner wall supports the supporting portion and is integrally molded with the supporting portion, such that the heating body, the supporting portion, and the inner wall are integrally molded, and wherein the coil is provided in a space between the inner wall and the outer wall and the coil is spaced apart from the inner wall and the outer wall. ### Claim 2 (depends on 1) The aerosol generating device of claim 1, wherein a projection is formed on one of the inner wall and the supporting portion, and wherein a groove for accommodating the projection is formed in remaining one of the inner wall and the supporting portion. ### Claim 3 (depends on 1) The aerosol generating device of claim 1, further comprising a sealing ring for sealing at a coupling portion between the inner wall and the outer wall. ### Claim 4 (depends on 1) The aerosol generating device of claim 1, wherein the inner wall and the outer wall are integrally molded. ### Claim 5 (depends on 1) The aerosol generating device of claim 1, wherein the inner wall comprises a protrusion protruding outwardly to support the coil. ### Claim 6 (depends on 5) The aerosol generating device of claim 5, wherein a cross-sectional area of the protrusion decreases in an outward direction from the inner wall toward the coil, thereby establishing a line contact between the protrusion and the coil. ### Claim 7 (depends on 5) The aerosol generating device of claim 5, wherein a height of the protrusion is 0.01 mm to 0.2 mm. ### Claim 8 (depends on 1) The aerosol generating device of claim 1, wherein the coil has a circular or polygonal cross-sectional shape. ### Claim 9 (depends on 1) The aerosol generating device of claim 1, further comprising a temperature sensor configured to measure a temperature of the heating body. ### Claim 10 (depends on 1) The aerosol generating device of claim 1, wherein a space is formed inside a lower end portion of the heating body in a lengthwise direction, and wherein a contact-type temperature sensor is installed on an inner surface of the heating body near an upper end portion of the space. ### Claim 11 (depends on 1) An aerosol generation system comprising: the aerosol generating device of claim 1; and the cigarette accommodated in the aerosol generating device. ### Claim 12 A method of manufacturing an aerosol generating device, the method comprising: forming a heating body comprising a ferromagnetic substance that generates heat by an induced magnetic field; forming a supporting portion configured to support the heating body; molding the heating body and the supporting portion into a single body by sintering; forming an inner wall integrally with and around the supporting portion through injection molding, such that the heating body, the supporting portion, and the inner wall are integrally molded; forming an outer wall such that the outer wall is provided outside the inner wall and spaced apart from the inner wall; and installing a coil configured to generate the induced magnetic field in a space formed between the inner wall and the outer wall, wherein the coil is spaced apart from the inner wall and the outer wall. ### Claim 13 (depends on 12) The method of claim 12, further comprising press-inserting the heating body into the supporting portion before the molding of the heating body and the supporting portion. ### Claim 14 (depends on 12) The method of claim 12, further comprising: forming an outer wall integrally with the inner wall such that the outer wall is provided outside the inner wall and spaced apart from the inner wall; and installing a coil configured to generate the induced magnetic field in a space formed between the inner wall and the outer wall.