Cigarette Heater Insulation Structure for Electromagnetic Heating
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Solution Overview
Problem
Existing low-temperature heating electronic cigarettes suffer from poor heat insulation and reduced energy efficiency due to metallic vacuum tubes impacting electromagnetic heating and air convection, leading to overheating and insufficient smoke generation.
Innovation Solution
A cigarette heater with an anisotropic material layer and multiple insulation layers, including an insulation tube and an outer heat shield, designed to reduce heat conduction and radiation while maintaining internal heat, using materials with varying thermal conductivity coefficients in different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a metallic vacuum tube is used for insulation, then the insulation structure is simple, but the energy efficiency of electromagnetic heating is reduced and the tube generates heat in the electromagnetic field
Solution Approach 1:
The patent removes the metallic vacuum tube from the insulation structure and replaces it with a non-metallic vacuum tube. This extraction of the problematic metallic component eliminates the interference with electromagnetic fields while maintaining the vacuum insulation function, thereby resolving the contradiction between structural simplicity and heating efficiency
Solution Approach 2:
The patent changes the material parameter of the vacuum tube from metallic to non-metallic material. This parameter change allows the tube to be transparent to electromagnetic waves, eliminating the heat generation issue in electromagnetic fields while preserving the vacuum insulation effect
2Device complexity
If a metallic vacuum tube is used for insulation, then the structure is simple, but air convection on the tube surface reduces the heat insulation effect
Solution Approach 1:
The patent employs a composite insulation structure consisting of a non-metallic vacuum tube combined with aerogel insulation material and an insulation sleeve. This composite approach addresses the heat loss through convection by adding multiple insulation layers with different mechanisms, overcoming the limitations of a single vacuum tube
3Loss of energy
If multiple insulation layers are added to improve insulation, then heat insulation effect is improved, but the device complexity increases
Solution Approach 1:
The patent divides the insulation function into multiple independent components: a non-metallic vacuum tube, an aerogel insulation layer, and an insulation sleeve. Each component performs a specific insulation function, and their segmented arrangement allows for optimized performance while maintaining reasonable structural complexity
4Loss of energy
If heat insulation is improved, then external heat dissipation is reduced, but internal heat becomes insufficient for sufficient smoke generation
Solution Approach 1:
The patent applies different insulation properties to different regions: the non-metallic vacuum tube provides insulation while allowing electromagnetic penetration for heating, the aerogel layer provides thermal insulation, and the insulation sleeve prevents external heat loss. This localized quality distribution ensures both effective heating and heat retention
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
Enhances heat insulation, prevents overheating, and maintains consistent smoke generation by minimizing heat dissipation and convection, improving user experience.
Implementation Method 1
the anisotropic material layer having a lower thermal conductivity coefficient in the radial direction than in the axial direction, and the anisotropic material layer configured for reducing conduction of heat from inside the heating cavity towards periphery of the heating cavity along the radial direction
Implementation Method 2
a first air medium layer is formed between the heat insulation assembly and the heating body
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A cigarette heater, comprising a heating assembly (10) and a heat insulation assembly (20) used for insulating the heating assembly (10); the heating assembly (10) comprises a longitudinal heating cavity (11) used for accommodating a cigarette and a heating body (12) used for heating the cigarette; the heat insulation assembly (20) comprises an anisotropic material layer (214a) sleeved outside the heating assembly (10), the thermal conductivity coefficient of the anisotropic material layer (214a) in the radial direction being lower than the thermal conductivity coefficient thereof in the axial direction, being used for reducing the thermal conduction of the heat in the heating cavity (110) along the radial direction toward the periphery. By means of arranging the anisotropic material layer (214a) outside the heating assembly (10), the present cigarette heater isolates the heat transfer in the radial direction and also converts the direction of conduction to a dispersed transfer toward the axial direction, reducing the radially outward heat transfer.