Induction Heater Assembly With Temperature Sensing for Uniform Aerosol
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Solution Overview
Problem
Existing aerosol generating devices using induction heating methods face challenges in uniformly distributing magnetic substances within cigarettes, leading to non-uniform aerosol generation and difficulty in precisely controlling the temperature of the heating element.
Innovation Solution
The aerosol generating device incorporates a heater assembly with a ferromagnetic substance that generates heat via an external magnetic field, where a temperature sensor is positioned to directly measure the heating element's temperature, allowing for precise control and uniform aerosol production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a magnetic substance is included in the cigarette for induction heating, then heat generation capability is improved, but temperature control precision deteriorates due to inability to directly measure the magnetic substance temperature
Solution Approach 1:
The patent introduces a temperature sensor as an intermediary measurement device that indirectly measures the temperature of the magnetic substance by detecting the temperature of the heating element in contact with it. This mediator enables temperature monitoring without requiring direct measurement of the magnetic substance itself, thereby resolving the measurement precision problem while maintaining the heat generation capability of the induction heating system.
Solution Approach 2:
The patent replaces the direct thermal contact measurement method with a non-contact or minimal-contact temperature sensing mechanism. The temperature sensor substitutes the need for direct magnetic substance temperature measurement, using electromagnetic or thermal field-based detection instead of mechanical/thermal contact, thus enabling precise temperature control in the induction heating system.
2Adaptability or versatility
If a magnetic substance is included in the cigarette, then induction heating function is enabled, but aerosol generation uniformity deteriorates due to non-uniform distribution of the magnetic substance
Solution Approach 1:
The patent extracts the magnetic substance from the cigarette structure and relocates it to a dedicated heating element or holder positioned within the heating chamber. This separation allows the magnetic substance to be precisely positioned and uniformly distributed in the heating element, while the cigarette itself remains separate, thereby enabling induction heating functionality without compromising aerosol generation uniformity.
Solution Approach 2:
The patent divides the heating system into separate functional components: the cigarette (aerosol generation source) and the heating element (containing the magnetic substance). This segmentation allows independent optimization of each component - the cigarette can be manufactured with consistent aerosol properties while the heating element can be designed for uniform magnetic substance distribution, thus resolving the uniformity problem while maintaining induction heating capability.
3Use of energy by moving object
If induction heating method is used with magnetic substance in cigarette, then heating efficiency is improved, but device complexity increases due to need for temperature sensing and control systems
Solution Approach 1:
The patent designs the temperature sensor and control system to serve multiple functions: monitoring heating element temperature, controlling power delivery to the induction coil, and ensuring safe operation. By making these components multi-functional, the patent reduces the need for separate dedicated systems, thereby maintaining high heating efficiency while minimizing the increase in device complexity.
Solution Approach 2:
The patent implements a self-regulating temperature control system where the temperature sensor automatically monitors and feeds back temperature information to the control circuit, which adjusts the power supply accordingly. This self-service mechanism eliminates the need for complex external monitoring and manual control systems, maintaining heating efficiency while reducing overall system 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 configuration enables accurate temperature measurement and control of the heating element, ensuring uniform aerosol generation and improved quality by eliminating non-uniform distribution issues.
Implementation Method 1
a heating element (111) including a ferromagnetic substance for generating heat by receiving an external magnetic field
Implementation Method 2
an aerosol generating device that applies an alternating magnetic field to the heater assembly
Implementation Method 3
a temperature sensor (115) disposed at a position in direct contact with an inner surface of the heating element (111)
Data Source
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AI summary
A heater assembly for heating a cigarette accommodated in an aerosol generating device includes a heating element that extends in a longitudinal direction of the cigarette and includes a ferromagnetic substance for generating heat by an external magnetic field, and a temperature sensor that measures a temperature of the heating element. The heater assembly is disposed at an inner end portion of an accommodation space provided in the aerosol generating device to accommodate the cigarette.