Electrohydrodynamic Atomizer Working-Point Control for Charge Prevention
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Solution Overview
Problem
Existing electrohydrodynamic atomization devices lack effective function control to prevent undesired electrostatic charges and ensure consistent coating performance.
Innovation Solution
A method for function control of an electrohydrodynamic atomizer that evaluates voltage and/or current at the high voltage source to determine a working point on a current/voltage characteristic curve, allowing for precise control of the atomization process and prevention of unwanted charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If very high electrical field strengths are applied to achieve electrohydrodynamic atomization, then fine spray droplets with narrow size distribution are produced, but undesired electrostatic charges accumulate on the body being coated
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the electrical parameters (voltage and current) of the high voltage source and adjusts the operating point on the current/voltage characteristic curve to maintain atomization performance while preventing excessive electrostatic charge accumulation on the coated body
Solution Approach 2:
The patent changes the electrical operating parameters by defining and controlling the working point on the current/voltage characteristic curve, adjusting voltage and current levels to optimize the balance between atomization quality and electrostatic charge prevention
2Reliability
If the high voltage source operates without precise function control, then the atomization process is simpler to operate, but coating performance becomes inconsistent and undesired charges occur
Solution Approach 1:
The control system uses feedback from voltage and current measurements to automatically adjust and maintain the optimal working point, ensuring consistent coating performance without requiring complex manual intervention or oversight
Solution Approach 2:
The system performs self-regulation by automatically monitoring its own electrical parameters and adjusting the high voltage source operating point to maintain optimal atomization conditions and prevent electrostatic charge accumulation
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 method enables precise control of the electrohydrodynamic atomization process, ensuring consistent coating performance and preventing undesired electrostatic charges by defining working points within a set range on the current/voltage characteristic curve.
Implementation Method 1
The electrohydrodynamic atomization is based on the instability of electrically chargeable fluids, in particular fluids which are sufficiently electrically charged under high voltage, in a strong, non-homogeneous electrical field
Implementation Method 2
Under certain conditions, in the Taylor cone mode, the droplets have a narrow size distribution
Implementation Method 3
at least one pump unit for transporting the fluid. The fluid is delivered to a nozzle arrangement of the atomizer by means of the pump unit
Data Source
AI summary
A method for the function control of an electrohydrodynamic atomizer, wherein an electrohydrodynamically atomized fluid, originating from the atomizer, is applied to a body, e.g. a person, in order to coat this body at least in certain areas, wherein the atomizer-comprises a fluid tank for storing the fluid and at least one high voltage source for making available a high voltage and at least one pump unit for transporting the fluid, wherein the fluid is delivered to a nozzle arrangement of the atomizer by means of the pump unit, and wherein the fluid is atomized electrohydrodynamically at the nozzle arrangement by means of the effect of the high voltage from the high voltage source, wherein a voltage and/or a current at the high voltage source is evaluated in order to acquire a working point of the high voltage source via a current/voltage characteristic curve.