Smoking Cartridge Susceptor Layout for Stable Induction Heating
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Solution Overview
Problem
Aerosol-forming substrates in induction heating type smoking devices experience unstable heating due to inconsistent induced current flow through the susceptor particles.
Innovation Solution
The smoking device cartridge incorporates a first susceptor with a first magnetic material and a second susceptor with a higher Curie temperature than the first, spaced apart or in contact with it, to stabilize induction heating by maintaining a magnetic field even when the first susceptor reaches its Curie temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single susceptor is used for induction heating, then the device structure is simple, but the heating stability is poor due to inconsistent induced current flow
Solution Approach 1:
The susceptor is divided into multiple segments (first susceptor and second susceptor) with different Curie temperatures. The first susceptor contains a first magnetic material with a lower Curie temperature, while the second susceptor contains a second magnetic material with a higher Curie temperature. This segmentation allows each susceptor segment to contribute to induced current flow at different temperature ranges, ensuring stable heating throughout the temperature increase process.
Solution Approach 2:
The invention uses composite magnetic materials with different Curie temperatures in the first and second susceptors. The first magnetic material is selected to have a Curie temperature lower than the target heating temperature, while the second magnetic material has a Curie temperature higher than the target heating temperature. This composite approach ensures that at least one susceptor maintains ferromagnetic properties and contributes to induced current flow throughout the heating process.
2Temperature
If the susceptor heating temperature exceeds the Curie temperature of the magnetic material, then high temperature heating is achieved, but the induced current flow becomes unstable and heating efficiency decreases
Solution Approach 1:
The invention changes the Curie temperature parameter of the magnetic materials used in the susceptors. By selecting a first magnetic material with a Curie temperature lower than the target heating temperature and a second magnetic material with a Curie temperature higher than the target heating temperature, the system ensures that the second susceptor maintains its ferromagnetic properties and contributes to induced current flow even when the first susceptor loses its magnetic properties at high temperatures.
Solution Approach 2:
The second susceptor with higher Curie temperature acts as a backup that beforehand compensates for the loss of magnetic properties in the first susceptor. When the first susceptor reaches its Curie temperature and loses ferromagnetic properties, the second susceptor is already in position to maintain the induced current flow, cushioning against the potential heating instability.
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
Stable induction heating of aerosol-forming substrates is achieved by ensuring a continuous induced current flow through the first susceptor, preventing overheating and maintaining ferromagnetic properties in the second susceptor, thus ensuring consistent aerosol production.
Implementation Method 1
The first susceptor is located inside the aerosol-forming substrates to enable inductively heating of the aerosol-forming substrates
Implementation Method 2
an alternating current flows through a coil built into the smoking device, and thereby, an alternating magnetic field is generated. This causes an induced current to flow through the susceptor particles, and the susceptor particles are inductively heated
Implementation Method 3
a first susceptor containing a first magnetic material; and a second susceptor containing a second magnetic material. A Curie temperature of the second magnetic material is higher than a Curie temperature of the first magnetic material
Data Source
AI summary
To stably heat aerosol-forming substrates in a smoking device cartridge used for an induction heating type smoking device. A smoking device cartridge (1) to be mounted in an induction heating type smoking device (70) for use includes aerosol-forming substrates (10) and a mouthpiece (30) located coaxially with the aerosol-forming substrates (10). The smoking device cartridge (1) includes a first susceptor (20) containing a first magnetic material (20a) and a second susceptor (25) containing a second magnetic material (25a). The first susceptor (20) is located inside the aerosol-forming substrates (10) to enable heating of the aerosol-forming substrates (10). The second susceptor (25) is spaced apart from the first susceptor (20), or is in contact with the first susceptor (20). A Curie temperature of the second magnetic material (25a) is higher than a Curie temperature of the first magnetic material (20a).