Heat-Not-Burn Device With Reflective Thermal Insulation
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Solution Overview
Problem
Existing heating non-combustion devices suffer from significant heat transfer loss to the casing, making it hot to the touch and resulting in low battery efficiency, especially with circumferential heating elements, and existing insulation materials like aerogel provide only partial relief.
Innovation Solution
Implementing a thermal insulation layer with reflective materials such as aluminum foil and hollow glass microspheres, or upconversion materials, combined with strategic air gaps and pillars, to redirect thermal radiation and enhance insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermal insulation layer is added to reduce heat transfer to the casing, then the casing temperature decreases, but the device structure becomes more complex
Solution Approach 1:
The patent applies composite materials by combining multiple insulation layers (aerogel layer, vacuum insulation layer, reflective barrier layer) with different thermal properties. Each layer addresses specific heat transfer mechanisms (conduction, convection, radiation), creating a multi-functional composite insulation system that achieves superior thermal performance while managing structural complexity through functional specialization.
Solution Approach 2:
The patent implements nesting by placing the heating element inside the outer pipe, then surrounding it with multiple concentric insulation layers (aerogel layer, vacuum layer, reflective layer). This nested arrangement allows each insulation layer to be positioned optimally around the heat source, maximizing thermal efficiency while organizing the complex structure in a compact, hierarchical manner.
2Loss of energy
If aerogel is used for thermal insulation, then heat transfer is partially reduced, but the casing still becomes hot when multiple cigarettes are consecutively smoked
Solution Approach 1:
The patent combines aerogel (for conductive insulation) with vacuum insulation (for convective insulation) and reflective barriers (for radiative insulation). This composite approach addresses all three heat transfer mechanisms, preventing heat accumulation in the casing even during consecutive smoking operations, thereby solving the limitation of using aerogel alone.
Solution Approach 2:
The vacuum insulation layer acts as an intermediary between the heating element and the outer casing, creating a thermal barrier that significantly reduces heat transfer. The vacuum environment prevents both conduction and convection, while the reflective layers intercept thermal radiation, effectively mediating the thermal interaction and preventing casing overheating.
3Volume of moving object
If the heating element is positioned within the outer pipe, then the device structure is compact, but significant heat transfer occurs making the casing hot to the touch
Solution Approach 1:
The patent uses nesting to place the heating element inside the outer pipe, then surrounds it with multiple concentric insulation layers. This nested structure achieves compactness by organizing components in a space-efficient hierarchical arrangement while the multiple insulation layers effectively block heat transfer to the casing, resolving the contradiction between compactness and thermal isolation.
Solution Approach 2:
The patent employs composite insulation materials (aerogel, vacuum layer, reflective barriers) that provide high thermal resistance in a thin profile. These composite materials enable effective heat blocking within the compact outer pipe structure, preventing casing overheating while maintaining device compactness.
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
Significantly reduces the temperature of the casing, improving user safety and battery efficiency by minimizing heat transfer, with aluminum foil showing a 14.1% reduction in power consumption and 42°C decrease in outer wall temperature.
Implementation Method 1
The inner wall of the outer pipe is provided with a thermal insulation layer, and there is or is not a gap between the thermal insulation layer and the inner wall of the outer pipe. In one embodiment, the thermal insulation layer is an aluminum reflective layer.
Implementation Method 2
In one embodiment, the thermal insulation layer is a hollow glass microsphere layer.
Implementation Method 3
In one embodiment, the first thermal insulation layer is an aluminum reflective layer, and the second thermal insulation layer is an upconversion material coating.
Data Source
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AI summary
A heating non-combustion device and its electronic cigarette, the heating non-combustion device includes a cigarette stick (1), an outer pipe (2), and a heating element (4); the cigarette stick (1) is at least partially located within the heating element (4), the heating element (4) is located within the outer pipe (2), and there is a first gap (3) between the heating element (4) and the outer pipe (2); and the inner wall of the outer pipe (2) is provided with a thermal insulation layer (5), and there is or is not a gap between the thermal insulation layer (5) and the inner wall of the outer pipe (2). The present utility model significantly improves the thermal insulation effect by setting a thermal insulation layer (5), effectively preventing the casing from being hot to the touch.