Heating Body Corrosion Protection via Dual Protective Films
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Solution Overview
Problem
The service life of heating bodies in electronic atomization devices is shortened due to corrosion from strong aerosol-generating substances, as existing solutions fail to adequately protect the heating material layer.
Innovation Solution
A heating body with a liquid-guiding substrate, a resistance heating material layer, and protective films – a non-conductive ceramic or glass film for the heating portion and a conductive ceramic or metal film for the electrode region – is designed to prevent corrosion, ensuring the heating material layer is protected from aerosol-generating substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heating material layer is directly exposed to the aerosol-generating substance, then the atomization function is maintained, but the heating material layer is corroded and service life is shortened
Solution Approach 1:
A protecting film is introduced as an intermediary layer between the heating material layer and the aerosol-generating substance. This protecting film acts as a mediator that prevents direct contact and chemical reaction between the heating material and corrosive substances, thereby extending service life while maintaining atomization function.
Solution Approach 2:
The heating body uses a composite structure consisting of multiple materials: the heating material layer (metal or alloy), the protecting film (ceramic, glass, or polymer), and the substrate. This composite material approach combines the heating properties of the metal layer with the corrosion resistance of the ceramic/glass/polymer coating, achieving both functionality and durability.
2Reliability
If a protecting film is added to protect the heating material layer, then corrosion resistance is improved, but the device structure becomes more complex
Solution Approach 1:
The protecting film is applied as a thin coating layer on the heating material layer. This thin film approach provides effective corrosion protection without significantly increasing the overall size or complexity of the heating body structure. The film can be deposited using standard coating techniques, maintaining manufacturing simplicity.
3Reliability
If the connection portion is protected with a non-conductive film, then corrosion resistance is improved, but electrical connection is compromised
Solution Approach 1:
Different regions of the heating material layer receive different types of protection: the heating portion (exposed to aerosol) is covered with a non-conductive protecting film for corrosion resistance, while the connection portion (requiring electrical contact) is covered with a conductive protecting film that maintains both corrosion resistance and electrical conductivity. This local differentiation of protective properties solves the contradiction between corrosion protection and electrical connection.
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 protective films significantly extend the service life of the heating material layer by preventing corrosion, improving atomization efficiency and consistency, as demonstrated by increased atomization amounts and resistance to thermal stress.
Implementation Method 1
a heating material layer, arranged on a first surface of the liquid-guiding substrate, wherein the heating material layer is a resistance heating material
Implementation Method 2
a first protecting film, at least partially arranged on the surface of the heating portion away from the liquid-guiding substrate, wherein the material of the first protecting film is non-conductive and resistant to corrosion of the aerosol-generating substance
Implementation Method 3
a second protecting film, at least partially arranged on the surface of the connection portion away from the liquid-guiding substrate, wherein the material of the second protecting film is conductive and resistant to the corrosion of the aerosol-generating substance
Data Source
Figure 1~2
Figure 3a~4
Figure 5~8
AI summary
The present disclosure discloses a heating body, an atomization assembly, and an electronic atomization device. The heating body comprises a liquid-guiding substrate, a heating material layer, a first protecting film, and a second protecting film. The liquid-guiding substrate comprises a heating region and an electrode region. The heating material layer is arranged on a first surface of the liquid-guiding substrate, and the heating material layer is a resistance heating material and comprises a heating portion arranged in the heating region and a connection portion arranged in the electrode region. The first protecting film is at least partially arranged on a surface of the heating portion away from the liquid-guiding substrate, the material of the first protecting film is non-conductive and resistant to corrosion of an aerosol-generating substance. The second protecting film is at least partially arranged on a surface of the connection portion away from the liquid-guiding substrate, and the material of the second protecting film is conductive and resistant to the corrosion of the aerosol-generating substance. The heating region and the electrode region of the heating material layer are protected through different protecting films, such that the heating material layer is prevented from being corroded by the aerosol-generating substance. In this way, a service life of the heating material layer is improved.