Aerosol Inhaler Control Circuit for Heater Overvoltage Protection
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Solution Overview
Problem
Aerosol inhalation devices face issues with insufficient aerosol supply and inability to generate intended flavors due to aerosol source shortages, and operational amplifiers and control units are prone to overvoltage errors, leading to operational errors and inefficient aerosol generation.
Innovation Solution
A control device for aerosol inhalation devices is designed with an operational amplifier and control unit that includes a diode to prevent overvoltage at input terminals, a converter to stabilize voltage for efficient aerosol generation, and a voltage dividing circuit to protect the control unit from overvoltage, ensuring stable aerosol production and device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a heater with high voltage is used to heat the aerosol source, then aerosol generation efficiency is improved, but the operational amplifier and control unit are exposed to overvoltage risks causing operational errors
Solution Approach 1:
The patent introduces a diode as an intermediary component between the high-voltage heater circuit and the low-voltage control circuits (operational amplifier and control unit). The diode acts as a voltage clamp, allowing the heater to operate at high voltage for efficient aerosol generation while preventing overvoltage from reaching the sensitive control components, thus resolving the contradiction between productivity and reliability
Solution Approach 2:
The patent segments the electrical circuit into distinct voltage domains: a high-voltage section for the heater that enables efficient aerosol generation, and a low-voltage section for the operational amplifier and control unit that ensures stable operation. The diode creates an electrical boundary between these segments, allowing each to operate optimally in its own voltage range without interfering with the other
2Reliability
If voltage protection components are added to prevent overvoltage, then device reliability is improved, but circuit complexity increases
Solution Approach 1:
The patent employs a diode, which is a simple, inexpensive, and reliable component, to provide overvoltage protection. The diode is a basic electronic component that is widely available and cost-effective, allowing the system to gain substantial reliability improvements without incurring high costs or adding significant complexity to the circuit design
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 solution effectively prevents overvoltage errors, ensures stable aerosol generation, and allows for the use of various loads with a single control device, improving aerosol inhalation efficiency and device reliability.
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.