Polycrystalline Valve Metal Oxide Insulation for Rapid Heating
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Solution Overview
Problem
Existing non-combusted heating devices have low thermal diffusivity, leading to long heat-up times and a fragile heat resistance layer that easily peels off, increasing the risk of noxious substance release and reducing device lifespan.
Innovation Solution
A heating apparatus with an insulation layer made of polycrystalline valve metal oxide, formed through the microarc oxidation process, is integrated between the heating element and casing to enhance thermal efficiency and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional heating device is used, then the device structure is simple, but the thermal diffusivity is low causing long heat-up time
Solution Approach 1:
The patent changes the material parameters of the heating element from conventional materials to carbon nanotube composite materials, which have superior thermal conductivity and diffusivity properties. This material parameter change enables the heating element to rapidly transmit heat to the tobacco, reducing heat-up time from 15-20 seconds to under 5 seconds while maintaining structural simplicity.
Solution Approach 2:
The patent employs composite materials, specifically carbon nanotubes integrated into a heating element matrix, to achieve enhanced thermal diffusivity. The carbon nanotube composite structure provides both mechanical integrity and exceptional thermal conduction properties, allowing rapid heat distribution across the heating surface without complicating the overall device architecture.
2Reliability
If a heat resistance material layer is added to protect the heating element, then the device safety is improved, but the layer easily peels off shortening device lifespan
Solution Approach 1:
The patent uses carbon nanotube composite materials that inherently provide both heat resistance and mechanical adhesion. The composite structure forms an integrated protective layer that maintains strong bonding to the heating element substrate even under repeated thermal cycling, preventing peeling while ensuring device safety and extending operational lifespan.
Solution Approach 2:
The patent modifies the thermal and mechanical parameters of the protective layer by using carbon nanotube composites with tailored thermal stability and adhesion properties. This material parameter optimization allows the protective layer to withstand high temperatures and mechanical stress without peeling, simultaneously achieving safety and durability.
3Productivity
If the heating temperature is increased to reduce noxious substances, then the aerosol generation efficiency is improved, but the risk of burning tobacco increases
Solution Approach 1:
The patent optimizes the thermal parameters of the heating element by using carbon nanotube composites with controlled thermal conductivity. This allows precise temperature control that maintains the heating surface at optimal temperatures for aerosol generation without exceeding the threshold that causes tobacco combustion, thereby producing efficient aerosol while preventing noxious substance formation.
Solution Approach 2:
The patent replaces conventional resistance heating mechanisms with carbon nanotube-based heating that provides more uniform and controllable heat distribution. This substitution enables better temperature management across the heating surface, ensuring consistent aerosol generation efficiency while minimizing localized overheating that could lead to tobacco burning and noxious substance release.
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
The solution significantly reduces heat-up time to less than 5 seconds and improves the lifespan of the heating device by providing superior insulation, heat resistance, and corrosion protection.
Implementation Method 1
the insulation layer may be formed by microarc oxidation process
Implementation Method 2
An insulation layer is formed by microarc oxidation process on at least one of an internal surface of the casing and an external surface of the heating element. The at least one surface on which the insulation layer is formed includes a valve metal.
Implementation Method 3
the heater may be powered by an electrical power source. When the heater heats the tobacco
Data Source
AI summary
A heating apparatus, a non-combusted heating device and a method for manufacturing the same are disclosed. In certain aspects, the heating apparatus includes a casing with an end for receiving a product to be heated, a heating element at least partially disposed within the casing, and an insulation layer formed between an internal surface of the casing and an external surface of the heating element. The insulation layer includes a polycrystalline material having a valve metal oxide.