Electrostatically Charged Aerosol Generation for Higher Deposition
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Solution Overview
Problem
Conventional aerosol-generating devices suffer from low deposition rates and low effective utilization of aerosol on target surfaces due to significant rebounding and drifting of vaporized aerosol particles.
Innovation Solution
An aerosol-generating device with a static electricity generating assembly that charges the aerosol-generating substrate using electrostatic induction, followed by vaporization to create charged aerosols, which are then adsorbed onto target surfaces via electrostatic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional vaporized aerosol particles are deposited on the surface of the target object, then the aerosol can reach the target surface, but the particles rebound and drift resulting in low deposition rate and low effective utilization
Solution Approach 1:
The patent changes the electrical charge parameter of the aerosol particles from neutral to charged (negative or positive) through electrostatic induction. The charging assembly induces opposite charges on the aerosol-generating substrate, and after vaporization, the aerosol particles carry electrical charge. This parameter change enables electrostatic attraction between charged aerosol particles and the target surface, significantly improving deposition rate and reducing rebounding and drifting phenomena.
Solution Approach 2:
The patent introduces an electrostatic field as an intermediary force between the aerosol particles and the target surface. The charging assembly creates an electrostatic field that induces charges on the aerosol-generating substrate, and this electrostatic interaction serves as the mediator that guides aerosol particles to the target surface, preventing rebounding and drifting without requiring direct mechanical contact or chemical bonding.
2Productivity
If a static electricity generating assembly is added to charge the aerosol-generating substrate, then the deposition rate improves, but the device complexity increases
Solution Approach 1:
The patent integrates the charging assembly with existing device components to achieve multi-functionality. The charging assembly shares structural elements with the housing and vaporization system, allowing it to perform both charging and structural support functions. This reduces the need for separate dedicated components, thereby limiting the increase in device complexity while still achieving improved deposition rates.
Solution Approach 2:
The patent merges the charging assembly with the housing structure and vaporization system. The charging assembly is integrated into the existing device architecture, combining multiple functions (charging, structural support, and vaporization) into a unified system. This merging approach improves deposition rate while avoiding the need for entirely separate complex subsystems.
3Reliability
If electrostatic induction is used to charge the aerosol-generating substrate, then aerosol particles are less likely to rebound, but the device requires additional electrical components
Solution Approach 1:
The patent employs electrostatic induction which allows the aerosol-generating substrate to charge itself automatically when exposed to the electric field from the charging assembly. The substrate acts as both the object to be charged and the source of charged aerosol particles, eliminating the need for separate charging mechanisms for each component. This self-service approach improves deposition stability while minimizing the number of additional electrical components required.
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 improves the deposition rate and utilization of aerosols on target surfaces by reducing rebounding and drifting, enhancing the effectiveness of aerosol delivery.
Implementation Method 1
one of the positive terminal and the negative terminal being electrically connected to the metal element so as to cause a part of the aerosol-generating substrate that is close to the metal element in the liquid storage cavity to be charged by electrostatic induction when the static electricity generating assembly is electrified
Implementation Method 2
a vaporization sheet, that, when electrified, is configured to vaporize the charged aerosol-generating substrate to generate a charged aerosol
Implementation Method 3
there is a relatively serious phenomenon in which vaporized aerosol particles rebound and drift, resulting in a relatively low deposition rate of the aerosol and low effective utilization
Data Source
AI summary
An aerosol-generating device includes: a housing having a liquid storage cavity for accommodating an aerosol-generating substrate; a metal element arranged outside the liquid storage cavity; a static electricity generating assembly including a positive terminal and a negative terminal, one of the positive terminal and the negative terminal being electrically connected to the metal element so as to cause a part of the aerosol-generating substrate that is close to the metal element in the liquid storage cavity to be charged by electrostatic induction when the static electricity generating assembly is electrified; and a vaporization sheet, that, when electrified, vaporizes the charged aerosol-generating substrate to generate a charged aerosol.