Vacuum Insulated Heating Assembly for Cigarette Substitutes
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Solution Overview
Problem
Existing cigarette substitute heating assemblies face challenges with heat dissipation and complex insulation structures due to the use of high-cost, high-temperature resistant materials, leading to inefficient heat management and increased equipment size.
Innovation Solution
A vacuum insulated heating assembly comprising an outer and inner tube with a vacuum area between them, where the inner tube has a tubular substrate with a heating circuit and is fixed to the outer tube using vacuum welding, reducing the need for specialized insulation and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a discrete heating tube and vacuum insulated tube are used with high temperature resistant plastic for fixing, then the heating tube and vacuum insulated tube can be relatively fixed, but the cost of the entire equipment increases significantly
Solution Approach 1:
The heating tube and vacuum insulated tube are merged into a single integrated structure where the heating circuit is formed directly on the inner tube. This eliminates the need for separate fixing components and high temperature resistant plastics, reducing manufacturing cost while maintaining structural stability.
Solution Approach 2:
The inner tube serves multiple functions simultaneously: it acts as both the heating element (with integrated heating circuit) and the vacuum insulated container. This multi-functionality eliminates the need for separate fixing mechanisms and reduces the number of components required.
2Stability of the object's composition
If high temperature resistant plastic is used for fixing the heating tube, then the heating tube can be fixed, but additional thin-walled parts are required for upper and lower heat insulations
Solution Approach 1:
The fixing structure and heat insulation are merged into a single vacuum-sealed integrated design. The vacuum area between the inner and outer tubes provides circumferential insulation, while the vacuum welding at the ends provides both fixing and axial insulation, eliminating the need for separate thin-walled parts.
3Loss of energy
If a discrete heating tube and vacuum insulated tube are used, then circumferential heat insulation is solved, but heat dissipation from upper and lower directions occurs causing low heat efficiency
Solution Approach 1:
The vacuum insulated heating assembly merges the heating function and insulation function into a single integrated structure. The vacuum area provides comprehensive insulation including axial directions, while the vacuum welding seals both ends to prevent heat loss, achieving complete thermal isolation without additional components.
4Loss of energy
If two separated parts (heating tube and vacuum insulated tube) are used, then heat insulation can be implemented, but the size of the entire equipment becomes larger
Solution Approach 1:
The heating tube and vacuum insulated tube are merged into a single compact integrated assembly where the heating circuit is formed on the inner tube. This integration eliminates the need for separate components and their associated fixing structures, significantly reducing the overall equipment size while maintaining effective heat insulation.
5Loss of energy
If two separated parts (heating tube and vacuum insulated tube) are used, then heat insulation can be implemented, but the cost of the entire equipment increases
Solution Approach 1:
The heating tube and vacuum insulated tube are merged into a single integrated structure with the heating circuit formed directly on the inner tube. This eliminates the need for multiple separate parts and their associated high-cost fixing materials, significantly reducing manufacturing cost while maintaining effective heat insulation.
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 retention, reduces heat dissipation, and minimizes equipment size and cost by eliminating the need for additional insulation, resulting in a more compact and efficient heating assembly.
Implementation Method 1
a heating circuit formed on a surface of the tubular substrate so as to generate heat after electrification
Implementation Method 2
two ends of the outer tube are fixed to an outer wall surface of the inner tube, a vacuum area is formed between an inner wall surface of the outer tube and the inner tube
Data Source
Figure 1
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AI summary
The invention relates to a baked smoking set, and a vacuum insulated heating assembly comprising an outer tube and an inner tube. The outer tube is fitted outside the inner tube, and two ends of the outer tube are fixed to an outer wall surface of the inner tube, a vacuum area is formed between an inner wall surface of the outer tube and the inner tube. The inner tube comprises an inner tube, and a heating circuit formed on a surface of the inner tube so as to generate heat after electrification; and an axial position of the heating circuit on the inner tube is within an axial interval of the vacuum area. The inner tube of the heating assembly does not participate in direct heating, so a heat dissipation rate of the inner tube to outside can be reduced, and rapid diffusion of heat to outside can be avoided. In addition, since the inner tube does not participate in direct heating, it is unnecessary to dispose a specialized heat insulation structure between the outer tube and the inner tube, so that the fixing way between the outer tube and the inner tube can be simplified, size of heating and heat insulation portions is more compact with fewer parts and simple structure design, and the product is reduced in volume for portability.