Resonant Microwave Electrospray Cavity for Low-Pressure Atomization
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Solution Overview
Problem
Traditional electrospray systems using high-voltage power sources experience electric breakdown in low-pressure environments and are not robust.
Innovation Solution
An electrospray device utilizing a resonant microwave cavity with a radio frequency inlet and a field concentrating pole to amplify voltage, forming an electric field for atomizing fluids, operated by a low-voltage power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-voltage power source is used in traditional electrospray systems, then the fluid can be atomized effectively, but the system experiences electric breakdown in low-pressure environments and is not robust
Solution Approach 1:
The patent applies resonance at a specific frequency (e.g., 28 GHz) to the microwave cavity, causing the cavity to vibrate and amplify the electric field. This resonant vibration enables effective atomization at much lower power levels (10-50 dBm) compared to traditional high-voltage systems, eliminating electric breakdown issues in low-pressure environments while maintaining reliable fluid atomization
Solution Approach 2:
The patent changes the operating parameters from high voltage to resonant frequency operation. By tuning the microwave cavity to resonate at a specific frequency, the system achieves effective atomization through frequency-based energy coupling rather than high voltage, fundamentally changing how the electrospray process is achieved and improving robustness in low-pressure environments
2Reliability
If a low-voltage power source is used, then electric breakdown is avoided, but the voltage amplification requirement increases device complexity
Solution Approach 1:
The resonant microwave cavity serves multiple functions simultaneously: it acts as a waveguide for microwave transmission, a resonant cavity for frequency-selective amplification, and an electric field generation chamber. This multi-functionality achieves the required voltage amplification without adding separate complex amplification stages, maintaining system robustness while managing device complexity
Solution Approach 2:
The resonant microwave cavity acts as an intermediary between the low-voltage power source and the fluid atomization process. It receives low-power microwave signals and transforms them into high-amplitude electric fields through resonant coupling, serving as a mediator that enables effective atomization without requiring high-voltage direct input
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 effectively atomizes fluids using a robust, low-voltage power source, avoiding electric breakdown in low-pressure environments.
Implementation Method 1
a resonant microwave cavity configured to amplify a voltage of the radio frequency signal
Implementation Method 2
a field concentrating pole disposed within the resonant microwave cavity configured to concentrate the amplified voltage at a first end of the field concentrating pole to form an electric field
Implementation Method 3
The electric field may atomize the fluid at the first end of the field concentrating pole forming an atomized fluid
Data Source
AI summary
In one embodiment, systems and methods include an electrospray device for atomizing fluids comprising a body defining a resonant microwave cavity, wherein the body comprises a radio frequency inlet configured to inject a radio frequency signal received from a power source into the resonant microwave cavity, wherein the resonant microwave cavity is configured to to amplify a voltage of the radio frequency signal. The device further comprises a field concentrating pole disposed within the resonant microwave cavity configured to concentrate the amplified voltage at a first end of the field concentrating pole to form an electric field. The device further comprises a nozzle disposed at the first end of the field concentrating pole and a fluid supply line configured to provide a fluid disposed within the field concentrating pole and fluidly connected to the nozzle, wherein the fluid supply line is fluidly connected to a fluid source.