Ultrasonic Atomizing Unit Elastic Member Width Optimization
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Solution Overview
Problem
Conventional ultrasonic atomizing units face challenges in spraying fine liquid particles effectively without increasing the voltage applied to the piezoelectric vibrator or using a fan, as they often suppress vibrations with wide elastic members, leading to reduced particle dispersion and increased device size.
Innovation Solution
An ultrasonic atomizing unit with a circular thin plate-shaped piezoelectric vibrator and a vibrating plate having micropores, where annular elastic members with a specific facing width ratio are used to minimize vibration suppression, allowing for efficient atomization and longer spray distances without increased voltage or fan usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wide elastic members are used to hold the atomizing member, then the atomizing member is securely held, but the vibrations of the atomizing member are suppressed, reducing spray distance
Solution Approach 1:
The elastic members are designed with a specific local geometry where the facing width is limited to 40% or less of the piezoelectric vibrator's radial width. This local quality constraint ensures that the elastic members provide sufficient holding stability while minimizing their interference with the vibration amplitude of the atomizing member, thereby resolving the contradiction between secure holding and spray distance.
2Length of moving object
If voltage applied to piezoelectric vibrator is greatly increased, then fine particles of liquid can be sprayed farther, but drive circuit size increases and vibrating plate life is reduced
Solution Approach 1:
The invention optimizes the mechanical vibration characteristics of the atomizing member by carefully designing the elastic members' facing width. This optimization enhances the vibration efficiency and spray distance without requiring increased voltage, thereby avoiding the need for larger drive circuits and preventing excessive stress on the piezoelectric vibrator that would reduce its lifespan.
3Length of moving object
If voltage applied to piezoelectric vibrator is greatly increased, then fine particles of liquid can be sprayed farther, but life of vibrating plate is reduced
Solution Approach 1:
By optimizing the elastic members' facing width to 40% or less of the piezoelectric vibrator's radial width, the invention enhances vibration efficiency and spray distance without increasing voltage. This approach prevents excessive stress and amplitude on the vibrating plate, thereby extending its operational life while achieving the desired spray distance.
4Length of moving object
If blast fan is used to spray fine particles farther, then spray distance is increased, but device size increases and liquid particles excessively spread
Solution Approach 1:
The invention extracts and eliminates the need for the blast fan by optimizing the ultrasonic atomization system itself. By carefully designing the elastic members' facing width, the system achieves enhanced spray distance through improved vibration efficiency, thereby removing the bulky fan component and its associated issues with device size and excessive liquid spread.
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 enables the ultrasonic atomizing unit to spray fine particles farther than conventional units, with a maximum spray height 2 to 3 times greater than comparable devices, while maintaining stable atomization and reducing the risk of excessive liquid spread.
Implementation Method 1
a piezoelectric vibrator 101 having an opening 101a at a central part thereof... When a high-frequency voltage is applied to electrodes 101b provided on the upper and lower surfaces of the piezoelectric vibrator 101, ultrasonic vibrations occur such that the piezoelectric vibrator 101 expands and contracts
Implementation Method 2
a pair of elastic members 103 that are arranged so as to extend along both surfaces, respectively, of the atomizing member 100... the casing 104 elastically sandwiches and holds therein the atomizing member 100 through the pair of elastic members 103
Implementation Method 3
the vibrating plate 102 is mounted to the lower surface of the piezoelectric vibrator 101... the atomizing member ultrasonically vibrate the vibrating plate with the piezoelectric vibrator to atomize a liquid
Data Source
AI summary
An ultrasonic atomizing unit is provided which can spray fine particles of a liquid farther without greatly increasing a voltage applied to a piezoelectric vibrator and using a fan. An annular atomizing member (1) is provided and ultrasonically vibrates a vibrating plate (12) with a piezoelectric vibrator (11) to atomize a liquid. The atomizing member (1) is elastically sandwiched and held by a casing (3) through a pair of annular elastic rings (2) that are in contact with the atomizing member (1). A maximum facing width in a radial direction between each annular elastic member and one surface of the atomizing member (1) on one side in the radial direction from the center of the atomizing member (1) is 40% of a radial direction width of the piezoelectric vibrator (11) on one side in the radial direction from the center of the piezoelectric vibrator (11).