Susceptor Temperature Sensor Magnetic Field Isolation
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Solution Overview
Problem
Existing aerosol generation devices face accuracy issues in temperature monitoring due to the temperature sensor being affected by the alternating magnetic field and generating heat, which impacts the sensing signal and accuracy.
Innovation Solution
The aerosol generation device incorporates a susceptor with a temperature sensor packaged within a magnetically isolated accommodation space, using an electrical connection portion outside the susceptor to receive temperature readings, ensuring the sensor is shielded from the magnetic field and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor made of metallic material is used to monitor the temperature of the susceptor, then the temperature can be sensed in real-time, but the temperature sensor generates heat under the alternating magnetic field and impacts the sensing signal accuracy
Solution Approach 1:
A non-metallic temperature sensor (e.g., thermocouple or thermistor) is introduced as an intermediary element to measure the susceptor temperature. This sensor is coupled to the susceptor through thermal contact (e.g., embedded in the tobacco rod or attached to the susceptor surface) without directly exposing the sensing element to the alternating magnetic field, thereby eliminating self-heating and signal interference while maintaining temperature monitoring capability
Solution Approach 2:
The temperature sensing function is separated from the susceptor structure. Instead of using a metallic sensor that would be directly exposed to the magnetic field, the system divides the sensing element into a non-metallic component that is thermally coupled to the susceptor but electrically and magnetically isolated from the alternating magnetic field environment
2Measurement precision
If a metallic temperature sensor is tightly held against the susceptor to sense real-time temperature, then temperature monitoring is achieved, but the metallic sensor and susceptor generate induction currents that impact sensing signal accuracy
Solution Approach 1:
A non-metallic temperature sensor serves as an intermediary that thermally couples to the susceptor for temperature sensing without generating induction currents. The sensor is positioned or coupled in such a way that it measures the susceptor temperature through thermal conduction while being electrically isolated from the alternating magnetic field that induces currents in metallic materials
Solution Approach 2:
The metallic temperature sensor is replaced with a non-metallic sensing element (such as a thermocouple made of non-conductive materials or a thermistor). This substitution eliminates the generation of induction currents while maintaining the mechanical coupling necessary for thermal contact and real-time temperature measurement
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 enhances the stability of temperature measurement and installation, reducing magnetic interference and improving the accuracy of temperature monitoring, allowing for precise control of the heating process.
Implementation Method 1
a susceptor, which is configured to be penetrated by the varying magnetic field to generate heat under induction, thereby heating the tobacco product
Implementation Method 2
a temperature sensor that is tightly held against the susceptor to sense the real-time operating temperature of the susceptor
Data Source
AI summary
An aerosol generation device comprises a susceptor configured to be penetrated by a varying magnetic field to generate heat, so as to heat a smokable material; a circuit; and a temperature sensor comprising a sensing portion packaged or accommodated within the susceptor, and an electrical connection portion connected to the sensing portion and at least partially located outside the susceptor. The circuit is electrically connected to the electrical connection portion, so that the temperature sensed by the sensing portion can be received by the electrical connection portion. In the aerosol generation device, the temperature sensor is packaged or accommodated within the susceptor, the effect of a magnetic field on the sensing portion can be substantially isolated, and the susceptor and the temperature sensor can be integrated into one piece, improving the stability of installation and the accuracy of temperature measurement, and also facilitating replacement and installation as a whole.