Piezoelectric Atomizer for Targeted Active Substance Delivery
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Solution Overview
Problem
Current diffusion devices for active ingredients, particularly those used on moving subjects, lack the ability to provide targeted, localized, and multidirectional delivery of active substances without the use of harmful solvents or propellant gases, and often suffer from inconsistent active ingredient concentration over time.
Innovation Solution
A piezoelectric diffusion device with a nebulization body and a reservoir, equipped with a ball joint orientation mechanism for precise directionality and a wick system for stable liquid supply, allowing for the use of pure or diluted active ingredients and maintaining consistent concentration, and enabling operation on moving subjects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heat-based diffusion devices are used to vaporize active ingredients, then diffusion efficiency is improved, but temperature-sensitive active ingredients are altered or degraded
Solution Approach 1:
The invention uses ultrasonic vibration to induce phase transition of liquid active ingredients directly into aerosol form without thermal heating. The piezoelectric transducer generates high-frequency vibrations that mechanically atomize the liquid, achieving diffusion through physical phase transition rather than thermal vaporization, thus preserving temperature-sensitive compounds.
Solution Approach 2:
The invention replaces the thermal field (heat-based vaporization) with a mechanical field (ultrasonic vibration). The piezoelectric transducer converts electrical energy to mechanical vibrations at ultrasonic frequencies, which directly atomize the liquid active ingredients, substituting the thermal diffusion mechanism with a mechanical atomization mechanism to avoid thermal degradation.
2Object-affected harmful factors
If wall-mounted diffusion devices use solvents to lower operating temperature, then active ingredient stability is improved, but toxic and flammable solvents are released into the environment
Solution Approach 1:
The invention extracts and eliminates the solvent component from the diffusion system. By using ultrasonic atomization, the device can diffuse pure active ingredients or water-based formulations without requiring volatile organic solvents, thereby removing the source of toxic emissions while maintaining active ingredient stability through low-temperature operation.
Solution Approach 2:
The invention changes the operating parameter from thermal temperature control (which requires solvents) to mechanical vibration frequency control. The piezoelectric transducer operates at specific ultrasonic frequencies to achieve atomization without heat, fundamentally changing the control parameter from temperature to vibration frequency, which eliminates the need for flammable solvents.
3Ease of operation
If polymer matrices are used for repellent treatment, then localized delivery is achieved, but active ingredient concentration decreases non-linearly over time
Solution Approach 1:
The invention transitions from static polymer matrix diffusion to dynamic ultrasonic atomization. The piezoelectric transducer continuously vibrates to atomize fresh active ingredient solution, creating a dynamic diffusion process that maintains consistent concentration output. The system can be activated on-demand, providing controlled and consistent dosage rather than passive, degrading matrix release.
Solution Approach 2:
The invention ensures continuous supply of active ingredient at consistent concentration through the wick-based liquid delivery system combined with ultrasonic atomization. As long as the liquid reservoir contains active ingredient solution, the wick continuously feeds the piezoelectric transducer, maintaining steady-state atomization and consistent diffusion output without the concentration decay inherent in polymer matrices.
4Ease of operation
If pneumatic aerosol devices are used for localized treatment, then targeted delivery is achieved, but propellant gases pose flammability and toxicity risks
Solution Approach 1:
The invention extracts and removes the propellant gas component from the aerosol generation system. Instead of using compressed gas to propel aerosol formation, the device uses ultrasonic vibration to directly atomize liquid active ingredients, eliminating the need for flammable and toxic propellants while maintaining targeted aerosol delivery capability.
Solution Approach 2:
The invention replaces the pneumatic propellant system with a liquid-based ultrasonic atomization system. The wick delivers liquid active ingredient solution to the piezoelectric transducer, which vibrates to create aerosol directly from the liquid phase without requiring gas pressure, substituting pneumatic propulsion with mechanical vibration-based atomization.
5Productivity
If aerosol therapy systems are used on moving subjects, then therapeutic substance delivery is achieved, but restrictive masks are required which are poorly tolerated
Solution Approach 1:
The invention segments the aerosol therapy system into a portable, wearable format that can be attached to specific body regions. The device separates the atomization function from the need for full-face masks, allowing localized aerosol generation at the point of application. This segmentation enables therapeutic delivery without restricting the subject's breathing or mobility through large restrictive masks.
Solution Approach 2:
The invention transitions from centralized mask-based aerosol delivery to distributed, localized aerosol generation at the application site. By placing the piezoelectric atomizer directly on or near the target area, the system delivers therapeutic substances in the third dimension (localized spatial distribution) rather than requiring the subject to wear a mask that covers the entire respiratory zone, thereby maintaining mobility and comfort.
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 device provides a stable and consistent delivery of active ingredients in a targeted and localized manner, avoiding harmful solvents and propellants, and allowing for precise control of dosage and direction, effectively treating areas of interest while maintaining mobility.
Implementation Method 1
The device comprises a piezoelectric element configured to vibrate at a frequency between 75 and 190 kHz
Implementation Method 2
piezoelectric element configured to vibrate at a frequency between 75 and 190 kHz
Implementation Method 3
a wick arranged to deliver the liquid active ingredient to the piezoelectric element
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to a refillable device (1) for spraying an active substance, comprising a reservoir (2) containing at least one active substance, said device (1) being equipped with a piezoelectric spraying mechanism (6). The invention also relates to the use of said device for spraying an active substance in a controlled manner from a distance in a desired direction. Said device is attached to the subject to be treated and can be used multi-directionally independently of the movements of the subject.