Aerosol Inhaler Power Supply Temperature Detection Circuit
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Solution Overview
Problem
Existing aerosol inhaler power supply units lack accurate temperature detection of the load used for aerosol generation, which affects efficiency and safety, and do not effectively improve aerosol generation efficiency.
Innovation Solution
A power supply unit for an aerosol inhaler that includes a first series circuit and a second series circuit connected in parallel, with an operational amplifier configured to detect the temperature of the load by measuring changes in its electric resistance value, allowing for efficient heating and accurate temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a simple heating circuit is used, then aerosol generation efficiency is improved, but temperature control accuracy deteriorates
Solution Approach 1:
The patent implements a feedback control system where the microcontroller continuously monitors the load temperature through resistance measurement and adjusts the heating power accordingly. The temperature detection unit measures the load resistance, converts it to temperature data, and feeds this information back to the microcontroller, which then regulates the heating circuit to maintain optimal temperature, thereby achieving both high aerosol generation efficiency and accurate temperature control.
Solution Approach 2:
The patent replaces mechanical temperature sensors with an electrical resistance-based temperature detection system. By measuring the resistance change of the heating load itself, the system eliminates the need for separate temperature sensing components. This substitution enables accurate temperature monitoring while maintaining a simple heating circuit structure, thus resolving the contradiction between simplicity and measurement precision.
2Reliability
If temperature detection accuracy is improved, then safety is enhanced, but device complexity increases
Solution Approach 1:
The patent employs the heating load itself as the temperature sensor by utilizing its inherent resistance-temperature characteristic. The load's own resistance change provides temperature information, eliminating the need for external temperature sensors and complex detection circuits. This self-service approach enables accurate temperature monitoring for safety while keeping the overall device structure simple.
Solution Approach 2:
The heating load serves dual functions: it acts as both the heating element and the temperature sensor. By leveraging the electrical resistance property of the load for temperature detection, the system achieves multi-functionality with a single component, thereby enhancing safety through accurate temperature monitoring without increasing device complexity.
3Productivity
If heating power is increased, then aerosol generation efficiency is improved, but temperature control stability deteriorates
Solution Approach 1:
The patent implements periodic temperature measurement and feedback control, where the microcontroller continuously monitors load resistance and adjusts heating duty cycle in real-time. This periodic action enables the system to respond to temperature changes dynamically, maintaining stable temperature control even during high-power heating phases, thus achieving both high aerosol generation efficiency and temperature stability.
Solution Approach 2:
The heating circuit operates in a dynamic manner with adjustable power levels based on real-time temperature feedback. The microcontroller modifies the heating duty cycle according to the detected temperature, enabling the system to transition smoothly between different power states. This dynamic control maintains temperature stability while allowing high heating power when needed for efficient aerosol generation.
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 enables precise temperature detection and control of the load, enhancing aerosol generation efficiency and ensuring safety by maintaining a sufficient aerosol generation while minimizing power loss and detection errors.
Implementation Method 1
detecting a temperature of the load (21) by measuring changes in its electric resistance value
Implementation Method 2
a heating circuit capable of supplying the load with a current larger than a current flowing through the load when a current flows through the first series circuit and the second series circuit
Data Source
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AI summary
A power supply unit for an aerosol inhaler has a power supply capable of performing discharge to a load, which heats an aerosol generation source and whose temperature and electric resistance value have a correlation. The power supply unit for the aerosol inhaler includes: a first element having a first electric resistance value connected in series to a load; a second series circuit including a second element having a second electric resistance value and a third element connected in series to the second element and having a third electric resistance value, and connected in parallel with a first series circuit including the load and the first element; an operational amplifier in which one of a non-inverting input terminal and an inverting input terminal is connected to the first series circuit, and the other of the non-inverting input terminal and the inverting input terminal is connected to the second series circuit; and a heating circuit capable of supplying the load with a current larger than a current flowing through the load when a current flows through the first series circuit and the second series circuit.