Aerosol Inhaler Control Circuit for Heater Overvoltage Protection
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Solution Overview
Problem
Existing aerosol inhalation devices face issues with operational amplifiers and control units being subjected to overvoltage, leading to operational errors due to high voltages applied to heaters, which affects aerosol generation and flavor delivery.
Innovation Solution
A control device with an operational amplifier and control unit protected by a diode connected to input terminals, a converter to stabilize voltage, and a voltage dividing circuit to prevent overvoltage, ensuring stable aerosol generation and efficient power utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high voltage is applied to the heater to generate sufficient aerosol, then aerosol generation efficiency is improved, but the operational amplifier and control unit may be damaged by overvoltage
Solution Approach 1:
The patent introduces a voltage dividing circuit as an intermediary component between the high-voltage heater circuit and the low-voltage control electronics. This circuit divides the high voltage into a lower voltage that is safe for the operational amplifier and control unit, allowing the heater to receive sufficient high voltage for efficient aerosol generation while protecting the control electronics from overvoltage damage
Solution Approach 2:
The patent segments the electrical system into distinct voltage domains: a high-voltage domain for the heater that enables efficient aerosol generation, and a low-voltage domain for the control electronics that ensures reliable operation. The voltage dividing circuit creates this segmentation, allowing each component to operate in its optimal voltage range without interfering with or damaging the other
2Use of energy by moving object
If the voltage applied to the heater varies with power supply conditions, then power utilization efficiency may improve, but control accuracy and aerosol generation stability deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the operational amplifier continuously monitors the actual voltage applied to the heater and compares it with the desired voltage. Based on this comparison, the control unit adjusts the power supply output to maintain the heater voltage within the specified range, ensuring stable aerosol generation while adapting to varying power supply conditions
Solution Approach 2:
The patent dynamically adjusts the voltage parameter within a controlled range (4.5V to 5.5V) to optimize both power utilization and aerosol generation stability. By allowing controlled variation rather than rigid fixed voltage, the system achieves better overall performance while maintaining reliability through the operational amplifier's voltage monitoring and adjustment
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 operational errors by stabilizing input voltages, allowing efficient aerosol generation and accurate control, even with varying loads and power supply conditions.
Implementation Method 1
a diode having an anode electrically connected to one of an inverting input terminal and a noninverting input terminal of the operational amplifier
Implementation Method 2
an operational amplifier configured to output a voltage according to a voltage applied to a load configured to heat an aerosol source
Implementation Method 3
a load configured to heat an aerosol source
Data Source
AI summary
Control device for aerosol inhalation device, includes operational amplifier including output terminal configured to generate voltage according to voltage applied to load configured to heat aerosol source and having correlation between temperature and electrical resistance value, control unit including input terminal and configured to perform processing based on voltage applied to the input terminal, and voltage dividing circuit configured to electrically connect the output terminal of the operational amplifier and the input terminal of the control unit. Power supply voltage of the operational amplifier is higher than power supply voltage of the control unit, and equals voltage applied to aerosol generation circuit including the load, and one of inverting input terminal and noninverting input terminal of the operational amplifier is electrically connected to the aerosol generation circuit.