Plant-Safe Electrospray Water Delivery With Conductive Root Shielding

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Solution Overview

Problem

Hydroponic and aeroponic plant production systems do not perform well in zero or microgravity environments due to root damage caused by electric fields associated with electrospray irrigation systems.

Innovation Solution

A system that isolates plant roots from electric fields by using a conductive mesh to shield them from electric currents while delivering water and nutrients through high-voltage, low-current electrospray, guided by capillaries to prevent root damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If electrospray irrigation is used to deliver water and nutrients efficiently, then resource efficiency is improved, but root damage occurs due to electric field exposure

Engineering Contradiction:

Improveresource efficiencyVSAvoidroot damage from electric field

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

A conductive mesh is introduced as an intermediary between the electrospray nozzle and the plant roots. The mesh receives electrically charged droplets and directs electrical charge to ground while allowing water and nutrients to pass through to the rooting media, thereby shielding roots from direct electric field exposure while maintaining efficient nutrient delivery

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system separates the electric field interaction zone (at the mesh) from the root growth zone (below the mesh). By segmenting the delivery path into charged droplet reception at the mesh and neutral water/nutrient delivery to roots, the harmful electric field effects are isolated from the sensitive root structures

Inventive Principle:

Principle #1Segmentation

2Device complexity

If conventional hydroponic or aeroponic systems are used, then plant production is simplified, but performance deteriorates in zero or microgravity environments

Engineering Contradiction:

Improvesystem simplicityVSAvoidperformance in microgravity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system replaces gravity-dependent liquid delivery mechanisms with electrospray technology that uses electric fields to propel charged droplets. This substitution enables reliable nutrient delivery in microgravity where conventional gravity-driven hydroponic or aeroponic systems fail to perform

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If high-voltage electrospray is applied directly to rooting media, then water and nutrient delivery efficiency is improved, but plant root safety deteriorates

Engineering Contradiction:

Improvewater and nutrient delivery efficiencyVSAvoidroot damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The conductive mesh serves as a mediator that intercepts high-voltage charged droplets and provides a safe pathway for electrical charge dissipation to ground, while permitting neutral water and nutrient solution to reach the rooting media and roots without harmful electric field exposure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system converts potentially harmful high-voltage electric fields into a beneficial delivery mechanism by charging droplets for efficient targeting and deposition, then safely dissipating the charge through the grounded mesh before the water and nutrients contact the roots

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Enables efficient and resource-effective plant growth in microgravity environments by preventing root damage and minimizing overspray, suitable for long-duration space missions.

Implementation Method 1

a high-voltage, low-current electrospray is used to deliver water and plant nutrients to the rooting media

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Implementation Method 2

a conductive mesh, which blocked the electric currents while allowing the water and nutrients to pass through

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 3

an electrospray system including at least one electrospray nozzle proximate each plant holder

Methodology Applied

Scientific EffectElectrospray: Electrohydrodynamics

Implementation Method 4

A plurality of capillaries may be configured to guide growth of roots away from the conductive mesh

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS12433203B2Plant-safe electrospray water and nutrient delivery system

Publication Date: 2025.10.07 RUTGERS THE STATE UNIV

AI summary

A plant holder for holding an amount of rooting (growing) media in which plant roots develop that electrically isolates the plant roots from an electric field used to deliver water and plant nutrients to that rooting media via a high-voltage, low-current electrospray system. A conductive material disposed proximate the rooting media receives electrically charged droplets including water or nutrients and passes the water or nutrients to the rooting media while directing the electrical charge to ground.