Inhalation Heater Control with Dynamic Resistance Reference Update
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Solution Overview
Problem
Existing inhalation device controllers face challenges in accurately detecting the temperature of a heater due to variations in the reference resistance value caused by parasitic resistance and contact resistance, leading to potential inaccuracies in detecting the dry state of the heater filament.
Innovation Solution
A controller for an inhalation device that includes a power supplier, a detection circuit, and a processor, which updates the reference resistance value of the heater after each heating process, allowing for accurate temperature detection by using the detected resistance value during heating processing and accounting for changes in the reference resistance value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the reference resistance value is measured before any heating is performed and used in all subsequent heater temperature detection processes, then the device complexity is reduced, but the measurement precision of heater temperature deteriorates due to variations in parasitic resistance and contact resistance
Solution Approach 1:
The reference resistance value is dynamically updated after each heating process instead of remaining static. The processor acquires a new reference resistance value following each heating operation, allowing the system to adapt to changing contact resistance conditions and maintain accurate temperature detection throughout the heater's lifecycle.
Solution Approach 2:
The system implements feedback by using the resistance value detected during heating processing to update the reference resistance value after heating. This closed-loop approach ensures that the reference value continuously reflects actual operating conditions, compensating for parasitic resistance variations and maintaining measurement accuracy.
2Measurement precision
If the reference resistance value is updated after each heating process, then the measurement precision of heater temperature is improved, but the loss of time increases due to additional detection and updating operations
Solution Approach 1:
The reference resistance value update operation is merged with the existing heating process workflow. The processor acquires the reference resistance value after heating completes, utilizing the same control cycle and processing resources already allocated for heating operations, thereby avoiding separate dedicated update operations and minimizing additional time overhead.
3Reliability
If the resistance value of the heater is detected during heating processing, then the reliability of detecting dry state is improved, but the device complexity increases due to additional detection circuit requirements
Solution Approach 1:
The detection circuit serves multiple functions: it detects the resistance value during heating processing for temperature monitoring, and also provides the reference resistance value after heating for future temperature detection accuracy. This multi-functional use of the same detection circuit eliminates the need for separate detection systems, maintaining reliability while avoiding additional complexity.
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
This solution ensures precise temperature control and detection of the heater, preventing inaccuracies in determining the dry state of the aerosol source, thereby improving the reliability of the inhalation device.
Implementation Method 1
a detection circuit configured to detect a resistance value of the heater
Implementation Method 2
a power supplier configured to supply power to a heater used to heat and atomize an aerosol source
Data Source
AI summary
The present invention provides a controller for an inhalation device, comprising: a power supplier configured to supply power to a heater used to heat and atomize an aerosol source; a detection circuit configured to detect a resistance value of the heater; and a processor configured to execute heating processing of heating the aerosol source by controlling the power supplier in accordance with reception of an atomization request of the aerosol source, wherein the processor controls the heating processing based on the resistance value of the heater detected using the detection circuit, a reference temperature of the heater, and a reference resistance value of the heater, and updates the reference resistance value by the resistance value of the heater detected using the detection circuit after an end of the heating processing and before the reception of the next atomization request.