Heating Element Insulator Structure for Heat-Not-Burn Tobacco Devices
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Solution Overview
Problem
Existing heat-not-burn smoking devices face issues with inconsistent product quality and short service life due to the thick film printing process used for electric heating conductive layers, which results in unstable resistance and a high risk of aging and open circuits, especially in high-temperature environments.
Innovation Solution
A heating device comprising a housing with a heating element and an insulator, where the heating element generates heat when electrified, and the insulator conducts this heat to the housing to prevent burning, while a high-temperature resistant non-stick coating ensures efficient tobacco heating and smoke generation, and a manufacturing method involving sintering of insulating paste to form a robust insulator, simplifying production and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thick film printing process is used to form the electric heating conductive layer, then the heating function is achieved, but the product consistency deteriorates due to uneven mixing of resistance paste
Solution Approach 1:
The patent replaces the thick film printing process (mechanical printing system) with a wire winding or mesh embedding system. This substitution eliminates the need for resistance paste mixing and printing, thereby resolving the inconsistency caused by uneven paste distribution. The wire or mesh provides a stable, uniform heating element that can be precisely positioned and controlled.
Solution Approach 2:
The patent changes the physical form of the heating element from a printed conductive layer (with variable thickness and composition) to a discrete wire or mesh structure with controlled geometry. This parameter change ensures uniform electrical resistance and consistent heating performance, directly addressing the product consistency issue.
2Reliability
If the thick film printing process is used to form the electric heating conductive layer, then the heating function is achieved, but the service life deteriorates due to aging and open circuit in high temperature environment
Solution Approach 1:
The patent replaces the printed conductive layer (which degrades through aging and open circuits) with a wire or mesh heating element. These alternative structures have superior thermal stability and mechanical strength, resisting degradation in high-temperature environments and preventing open circuit failures, thereby extending service life.
Solution Approach 2:
The patent employs wire or mesh materials with superior thermal and mechanical properties compared to printed resistance paste. These materials exhibit better resistance to thermal aging, oxidation, and mechanical stress, ensuring long-term reliability in high-temperature operation.
3Ease of manufacture
If the thick film printing process is used to form the electric heating conductive layer, then the heating function is achieved, but the manufacturing complexity increases due to various manufacturing procedures
Solution Approach 1:
The patent replaces the complex thick film printing process (involving paste preparation, screening, firing, and quality control) with simpler wire winding or mesh embedding techniques. These alternative methods require fewer processing steps, less specialized equipment, and simpler process control, directly reducing manufacturing complexity.
4Ease of manufacture
If the thick film printing process is used to form the electric heating conductive layer, then the heating function is achieved, but the manufacturing cost increases due to expensive materials and equipment
Solution Approach 1:
The patent replaces expensive thick film printing materials (specialized resistance paste, binder, solvents) and equipment (printing screens, firing furnaces) with more economical wire or mesh heating elements. These alternatives use standard materials and simpler fabrication equipment, significantly reducing both material and capital costs.
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 provides improved product consistency and extended service life, reduces production costs, and enhances performance by using a simpler and more convenient manufacturing process, ensuring reliable heat transfer and tobacco atomization without burning.
Implementation Method 1
a first heating element disposed on the first housing and configured to generate heat when electrified
Implementation Method 2
the heat is conducted to the first housing through the first insulator, to heat but not burn the tobacco
Data Source
AI summary
A heating device and a manufacturing method therefor, and a heat-not-burn smoking device. The heating device includes a first heating assembly, including a first housing configured for contacting with a tobacco, a first heating element on the first housing and configured to generate heat when electrified, and a first insulator between the first heating element and the first housing. The first heating element generates heat when electrified, the heat is conducted to the first housing through the first insulator, to heat but not burn the tobacco. The heating device is formed by cooperation of the heating element, the insulator and the housing, and heats the tobacco by the heating element when electrified. Compared with a heating conductive layer formed by a thick film printing process, the manufacturing of the heating device is simpler and more convenient, and the consistency and service life of the product are greatly improved.