Aerosol Heater Control Circuit for Overcurrent and Overheat Detection
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Solution Overview
Problem
Electronic aerosol generating devices are prone to overheating, short circuits, overcurrent, and overcharging, posing safety risks due to inadequate control methods.
Innovation Solution
An aerosol generating device with a controller that distinguishes between heating and non-heating states, communicating with separate circuit units to monitor current flow and temperature, detecting abnormalities, and initiating safety measures such as stopping operations or resetting when anomalies are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single control method is used for both heating and non-heating states, then the device structure is simple, but safety accidents occur due to overheating and overcurrent
Solution Approach 1:
The control unit is divided into a first control circuit for heating state and a second control circuit for non-heating state. Each circuit is independently configured to monitor and control specific parameters (temperature, current) for its respective operating state, enabling precise safety control without requiring a completely new unified control system.
Solution Approach 2:
The controller determines the operating state (heating or non-heating) in advance and selectively activates the appropriate control circuit before any abnormal condition can develop. This preliminary state recognition allows the system to apply the correct safety parameters proactively, preventing overheating and overcurrent accidents before they occur.
2Reliability
If separate control circuits are used for heating and non-heating states, then safety is improved, but device complexity increases
Solution Approach 1:
The controller is designed with multi-functionality to perform both heating control and non-heating control tasks. By integrating both control circuits within a single controller unit that can determine operating states, the system achieves comprehensive safety coverage while avoiding the need for entirely separate control devices, thus limiting the increase in overall device complexity.
3Measurement precision
If continuous monitoring is performed in both states, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The monitoring system dynamically adjusts its behavior based on the determined operating state. The first control circuit monitors temperature and current parameters during heating state, while the second control circuit monitors different parameters during non-heating state. This dynamic adaptation ensures precise abnormality detection for each state while avoiding unnecessary continuous monitoring in both states simultaneously, thereby reducing overall energy consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device ensures safety by preventing accidents related to overheating, short circuits, and overcurrent, maintaining stability through advanced control and self-stopping mechanisms.
Implementation Method 1
a heater configured to heat an aerosol generating material to generate an aerosol
Data Source
AI summary
An aerosol generating device includes: a heater configured to heat an aerosol generating material to generate an aerosol; a battery configured to supply power to the heater; a controller configured to determine an operating state of the aerosol generating device divided into a heating state and a non-heating state; a first circuit unit configured to control operation of the heater; and a second circuit unit configured to control charging and discharging of the battery, wherein the controller communicates with the first circuit unit in the heating state, communicates with the second circuit unit in the non-heating state, and, on the basis of a result of the communication, determines whether or not an abnormality has occurred according to the operating state of the aerosol generating device, thus allowing a safety accident of the aerosol generating device to be prevented in advance.