Personal Vaporizer Heating Element Temperature Control
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Solution Overview
Problem
Existing personal vaporizing devices, such as electronic cigarettes, face challenges in accurately controlling the temperature of their heating elements, leading to inefficient vaporization and potential overheating, which can result in the formation of undesired volatile compounds due to irregularities in disposable consumables' manufacturing processes.
Innovation Solution
A method that involves measuring the resistance of the heating element by applying a current and determining its temperature using reference values stored on the consumable, allowing for precise temperature control by the main body of the device, which includes a memory to store resistance and temperature coefficient data for accurate power regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature control is implemented using standard resistance measurement, then temperature regulation is achieved, but measurement precision is insufficient due to manufacturing irregularities in disposable consumables
Solution Approach 1:
The patent stores reference resistance values in the disposable consumable during manufacturing, before the actual temperature measurement is needed. This preliminary action captures the specific resistance characteristics of each heating element at reference temperatures, allowing the system to later use these pre-stored values to compensate for manufacturing variations and achieve precise temperature measurements.
2Productivity
If power is increased to ensure efficient vaporization, then vaporization efficiency improves, but overheating occurs leading to undesired volatile compounds
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the resistance of the heating element and uses this information to regulate the power supplied. By comparing the measured resistance against the stored reference values and calculated temperature relationships, the system adjusts power delivery to maintain optimal vaporization temperature, preventing both inefficient vaporization and overheating that would produce harmful compounds.
3Device complexity
If resistance measurement is performed without accounting for temperature coefficients, then measurement process is simplified, but temperature determination accuracy decreases
Solution Approach 1:
The patent stores temperature coefficients of resistance for the heating element in the disposable consumable. These coefficients allow the system to mathematically adjust resistance measurements based on temperature relationships, transforming the simple resistance measurement into an accurate temperature determination by accounting for how resistance changes with temperature for this specific heating element.
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 enables precise temperature regulation of the heating element, ensuring efficient vaporization and preventing overheating, thereby maintaining the quality of the vaporized liquid and extending the lifespan of the consumable by avoiding dry wick situations.
Implementation Method 1
Vaporization occurs when the heating element heats up the vaporizing material for instance a vaporizing liquid in or on a liquid transfer element (such as a wick) to a temperature exceeding the boiling temperature of the material (e.g. liquid), where vaporization occurs.
Implementation Method 2
the heating element heats up the vaporizing material
Implementation Method 3
the temperature of the heating element can be measured by applying a current through the heating element, measuring the resulting voltage at its ends, and determining the resistance of the heating element therefrom
Data Source
AI summary
A cartridge for a personal vaporizing device includes a liquid store, a liquid transfer element, a heating element, a first power terminal and a second power terminal connected to the heating element, and a memory configured to store a first reference value indicating the resistance of the heating element at a reference temperature or reference. A method of manufacturing such a cartridge is also provided. A main body of a personal vaporizing device has a cartridge seating configured to receive such a cartridge.