# US 12,004,569 B2 · Aerosol generating apparatus determining abnormal operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,569 B2 - Document ID: US12004569B2 - Status: Granted - Kind: B2 - Application number: 17/267,284 - Filed: 2020-12-10 - Published: 2022-12-29 - Granted: 2024-06-11 - Earliest claimed: 2020-03-13 - Assignees: Kt&G Corporation - Applicants: Kt&G Corporation - Inventors: Yong Hwan Kim; Sung Wook Yoon; Seung Won Lee; Dae Nam Han - Web page: https://patentgrep.com/patent/US12004569B2 ## CPC - A24F 40/50: Control or monitoring - A24F 40/53: Monitoring, e.g. fault detection - A24F 40/46: Shape or structure of electric heating means - A24F 40/65: Devices with integrated communication means, e.g. wireless communication means - A24F 40/20: Devices using solid inhalable precursors - A24F 40/465: specially adapted for induction heating - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) ## Abstract According to some embodiments, an aerosol generating device may include a battery, a first control circuit configured to convert power received from the battery into a pulse width modulation (PWM) signal, a heater configured to heat an aerosol generating article based on the PWM signal received from the first control circuit, and a second control circuit configured to transmit an instruction for causing the first control circuit to generate the PWM signal, in response to a user input to the first control circuit. The first control circuit may determine abnormal operation of the second control circuit, and the second control circuit may determine abnormal operation of the aerosol generating device. Accordingly, the aerosol generating device may determine a more specific operation state and prevent abnormal operation of the heater. ## Claims ### Claim 1 An aerosol generating device comprising: a battery; a first control circuit configured to convert power received from the battery into a pulse width modulation (PWM) signal; a heater configured to heat an aerosol generating article based on the PWM signal received from the first control circuit; and a second control circuit configured to transmit an instruction to the first control circuit, for causing the first control circuit to generate the PWM signal in response to a user input to the first control circuit, wherein, based on a determination that the second control circuit is operating abnormally, the first control circuit is configured to block the PWM signal from being transmitted to the heater, and wherein the first control circuit is configured to determine whether the second control circuit is operating abnormally based on at least one parameter generated from the second control circuit. ### Claim 2 (depends on 1) The aerosol generating device of claim 1, wherein the first control circuit is configured to: compare the at least one parameter generated from the second control circuit with at least one parameter generated from the first control circuit; and determine that the second control circuit is operating normally based on the at least one parameter generated from the second control circuit and the at least one parameter generated from the first control circuit matching each other. ### Claim 3 (depends on 2) The aerosol generating device of claim 2, wherein the first control circuit is configured to determine that the second control circuit is operating abnormally based on the at least one parameter generated from the second control circuit and the at least one parameter generated from the first control circuit not matching each other. ### Claim 4 (depends on 1) The aerosol generating device of claim 1, wherein the first control circuit is configured to determine that the second control circuit is operating abnormally when the first control circuit fails to receive the at least one parameter generated from the second control circuit within a preset time. ### Claim 5 (depends on 1) The aerosol generating device of claim 1, wherein the at least one parameter generated from the second control circuit and the at least one parameter generated from the first control circuit include a current temperature value of the heater, a target value of a temperature to be controlled by the first control circuit, an operation duration of the heater, and a count accumulating a number of times the second control circuit and the first control circuit communicate with each other. ### Claim 6 (depends on 1) The aerosol generating device of claim 1, wherein the first control circuit comprises a timer for measuring an operation duration of the heater, and the first control circuit is further configured to, when determined that the second control circuit is operating abnormally, block the PWM signal from being transmitted to the heater based on the operation duration measured by the timer exceeding a threshold value. ### Claim 7 An aerosol generating device comprising: a battery; a first control circuit configured to convert power received from the battery into a pulse width modulation (PWM) signal; a heater configured to heat an aerosol generating article based on the PWM signal received from the first control circuit; and a second control circuit configured to transmit an instruction for causing the first control circuit to generate the PWM signal in response to a user input to the first control circuit, wherein the first control circuit is configured to determine whether the second control circuit is operating abnormally based on a parameter generated from the second control circuit, and the second control circuit is configured to determine whether the aerosol generating device is operating abnormally based on at least one from among a parameter generated from the first control circuit, the parameter generated from the second control circuit, and a parameter indicating whether power is supplied to at least one from among the first control circuit and the second control circuit. ### Claim 8 (depends on 7) The aerosol generating device of claim 7, wherein the second control circuit is configured to determine that a communication error between the second control circuit and the first control circuit has occurred based on the parameter generated from the first control circuit corresponding to a negative acknowledgment (NACK) signal. ### Claim 9 (depends on 7) The aerosol generating device of claim 7, wherein the second control circuit is configured to reset the first control circuit based on determining that the first control circuit is operating abnormally. ### Claim 10 (depends on 7) The aerosol generating device of claim 7, further comprising a display capable of outputting visual information, wherein the second control circuit is configured to, based on determining the aerosol generating device is operating abnormally, output a notification using the display indicating a state corresponding to abnormal operation of the aerosol generating device.