Heater Load-Switch Protection in Aerosol Generating Devices
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Solution Overview
Problem
Aerosol generating devices with heaters are prone to malfunction, leading to decreased user satisfaction and potential device damage.
Innovation Solution
Incorporation of a load switch with a protection circuit to monitor electrical signals and control power supply to the heater, preventing abnormal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a heater is used to heat the aerosol generating material, then aerosol generation function is improved, but heater malfunction risk increases
Solution Approach 1:
The protection circuit performs preliminary monitoring of electrical signals before the heater can cause damage. By continuously checking for abnormal conditions (overcurrent, short circuit, open circuit) and preemptively cutting off power supply when issues are detected, the system prevents heater malfunction before it occurs, resolving the contradiction between maintaining heating functionality and reducing malfunction risk.
2Reliability
If a protection circuit is added to monitor electrical signals, then heater reliability is improved, but device complexity increases
Solution Approach 1:
The protection circuit is designed to perform multiple monitoring functions simultaneously using a single integrated structure. It can detect overcurrent, short circuit, and open circuit conditions all through one circuit system, rather than requiring separate monitoring circuits for each condition. This multi-functional approach improves heater reliability while minimizing the increase in device complexity.
3Ease of operation
If the load switch controls power supply to the heater, then power management is improved, but abnormal operation risk increases
Solution Approach 1:
The protection circuit continuously monitors the electrical signals from the load switch and provides feedback control. When abnormal conditions are detected (such as excessive current or improper switching), the system automatically adjusts or cuts off power supply to the heater. This feedback mechanism ensures safe power management while preventing abnormal operations, resolving the contradiction between ease of power control and operational reliability.
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
Prevents heater malfunctions, ensuring consistent device performance and user satisfaction.
Implementation Method 1
at least one heater configured to heat an aerosol generating material
Implementation Method 2
a protection circuit configured to monitor an electrical signal of the load switch and to output the enable signal to the third terminal
Data Source
Figure 1~3
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AI summary
Provided is an aerosol generating device including at least one heater configured to heat an aerosol generating material, a power supply configured to supply power to the at least one heater, a load switch including a first terminal electrically connected to the power supply, a second terminal electrically connected to the at least one heater, and a third terminal configured to receive an enable signal turning on or off an electrical connection between the first terminal and the second terminal, a controller configured to control power supplied to the heater, and a protection circuit configured to monitor an electrical signal of the load switch and to output the enable signal to the third terminal.