Heating Assembly with Segmented Induction Coil for Aerosol Devices
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Solution Overview
Problem
Conventional heating assemblies in aerosol-generation devices have low heat utilization due to inefficient heat distribution, as the entire bowl is often heated instead of concentrating heat where the aerosol-forming substrate is primarily located.
Innovation Solution
A heating assembly with a bowl divided into two parts, where the first part is made of electromagnetic induction material and surrounded by a first sub-coil to generate heat through electromagnetic induction, while the second part is not, and a second sub-coil is connected in series to increase power output without inducing the bowl, concentrating heat and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the entire bowl is heated using conventional heating assemblies, then the heating coverage is comprehensive, but the heat utilization is low
Solution Approach 1:
The bowl is segmented into two distinct parts: a first bowl part made of electromagnetic induction material and a second bowl part made of non-induction material (such as quartz glass or ceramic). The electromagnetic coil is correspondingly segmented into a first sub-coil surrounding the first bowl part and a second sub-coil surrounding the second bowl part. This segmentation allows selective heating of only the first bowl part containing the aerosol-forming substrate, improving heat utilization while maintaining adequate heating coverage.
Solution Approach 2:
Different parts of the bowl are assigned different material properties: the first bowl part uses electromagnetic induction material for active heating, while the second bowl part uses non-induction material (quartz glass or ceramic) that does not generate heat. This local differentiation ensures that heat is concentrated where the substrate is located, reducing energy loss without compromising the functional areas.
2Power
If the electromagnetic coil surrounds the entire bowl, then the power output is sufficient, but the heat concentration is low
Solution Approach 1:
The electromagnetic coil is divided into two separate sub-coils: the first sub-coil surrounds the first bowl part to generate concentrated heat for substrate vaporization, while the second sub-coil surrounds the second bowl part without inducing electromagnetic effects. This segmentation maintains sufficient total power output while achieving high heat concentration in the critical heating zone.
Solution Approach 2:
The electromagnetic induction property is applied locally only to the first sub-coil and first bowl part, creating a focused high-temperature zone. The second sub-coil and second bowl part are designed to avoid electromagnetic induction, ensuring that power is concentrated where needed without dispersing heat to areas where it is not required, thus achieving both sufficient power and high heat concentration.
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 design enhances heat utilization by focusing heat generation on the area where the aerosol-forming substrate is primarily located, increasing the concentration of heat and power output through series resonance.
Implementation Method 1
the first sub-coil is arranged surrounding the first bowl part, and is configured to cause the first bowl part to generate heat through electromagnetic induction
Implementation Method 2
The heating element is configured to generate heat after being electrified to heat and vaporize the aerosol-forming substrate in the bowl by heat conduction
Data Source
AI summary
A heating assembly for heating an aerosol-forming substrate includes: a bowl for carrying the aerosol-forming substrate, the bowl including a first bowl part and a second bowl part arranged along a height direction and connected to each other; and an electromagnetic coil having a first sub-coil and a second sub-coil connected in series. The first sub-coil is arranged surrounding the first bowl part, and causes the first bowl part to generate heat through electromagnetic induction. The second sub-coil does not electromagnetically induce the bowl.