Droplet Generating Device Uniform Supersaturation
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Solution Overview
Problem
Existing droplet generating devices face inefficiencies in removing small particle pollutants from air due to non-uniform supersaturation and temperature gradients, leading to uneven droplet sizes and reduced filter effectiveness over time.
Innovation Solution
A droplet generating device with an evaporation and condensation unit arranged to intersect the air flow direction, featuring a mesh structure with hydrophilic wires and heating elements, which supplies vapor to create a uniform supersaturation state and temperature distribution, ensuring efficient vapor condensation on particle surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vapor is supplied into the tube using diffusion phenomena and pressure difference, then droplet generation is enabled, but non-uniform supersaturation gradient causes non-uniform droplet sizes
Solution Approach 1:
The patent changes the physical parameters of the system by introducing a heating element to actively control temperature distribution within the tube. This transforms the passive diffusion-based vapor supply into an actively controlled process where temperature and supersaturation can be uniformly distributed, thereby producing uniform droplet sizes while maintaining efficient droplet generation
Solution Approach 2:
The patent replaces the reliance on natural diffusion phenomena and pressure differences with an engineered thermal field created by the heating element. This substitution of mechanical/passive processes with a controlled thermal system enables precise control over vapor distribution and supersaturation, resolving the uniformity issue
2Productivity
If air flows through the tube, then particle removal is enabled, but non-uniform temperature gradient prevents uniform vapor condensation
Solution Approach 1:
The patent actively modifies the temperature parameter distribution within the tube by introducing a heating element that creates a uniform temperature field. This controlled parameter change ensures that vapor condensation occurs uniformly across all particles in the air stream, while maintaining continuous air flow for effective pollutant removal
3Productivity
If filter is used to remove particles, then initial particle removal is effective, but efficiency deteriorates over time
Solution Approach 1:
The patent utilizes phase transition of water (liquid to vapor to condensation) as a regeneration mechanism. The heating element evaporates condensed water from particles, and the subsequent cooling causes uniform condensation. This cyclic phase transition process continuously regenerates the particle surfaces, maintaining high removal efficiency over extended periods without filter clogging
Solution Approach 2:
The system performs self-cleaning through the phase transition process. The heating element periodically evaporates accumulated condensate from particles, and the natural cooling and re-condensation cycle refreshes the particle surfaces. This self-service mechanism prevents the efficiency deterioration that plagues conventional filters
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 generates uniform droplets by maintaining a consistent supersaturated state and temperature distribution, enhancing droplet formation and pollutant removal efficiency.
Implementation Method 1
the heating element may evaporate the vapor from the surface of the wires
Implementation Method 2
condense the vapor on surfaces of the particles to form a droplet
Implementation Method 3
each of the wires may include a concave-convex pattern or a hydrophilic surface coating layer for holding liquid using a capillary force
Data Source
AI summary
A droplet generating device includes a tube defining a area in which air including particles flows along a first direction and an evaporation and condensation unit disposed in the tube to intersect with the first direction, the evaporation and condensation unit supplying vapor in the area to supersaturate the area to condense the vapor on surfaces of the particles to form a droplet. Accordingly, droplets may be effectively generated.