Electrolytic Spa Sanitation System With User-Replaceable Electrodes

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Solution Overview

Problem

Existing water sanitation systems for hot tubs and spas require continuous water circulation to be effective, leading to increased energy consumption and electrode wear, necessitating frequent replacement by trained technicians and inefficient use of electrodes.

Innovation Solution

A sanitation system that operates independently of water circulation, selectively changes electrode polarity based on impedance, maintains optimal voltage and current parameters, and allows user-replaceable electrodes, enabling more accurate measurement of remaining life and extending electrode lifespan.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electrolytic sanitation systems are integrated into the water circulation system with the pump, then mixing of sanitation chemicals is improved, but energy consumption increases and the system requires continuous water circulation to be effective

Engineering Contradiction:
Improvesanitation effectivenessVSAvoidenergy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts the sanitation function from the water circulation system by providing a standalone electrolytic sanitation system that operates independently of the pump and water circulation. This allows the sanitation system to function without requiring continuous water circulation, thereby reducing energy consumption while maintaining sanitation effectiveness.

Inventive Principle:
Principle #2Taking out (Extraction)

2Reliability

If electrolytic sanitation systems operate with continuous water circulation, then sanitation effectiveness is improved, but electrode wear increases requiring frequent replacement

Engineering Contradiction:
Improvesanitation effectivenessVSAvoidelectrode lifespan
Core Design Contradiction:
ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent extracts the sanitation function from the water circulation system, allowing the electrolytic cell to operate independently without requiring continuous water circulation. This reduces the operational stress on electrodes and extends their lifespan while maintaining sanitation effectiveness through targeted electrolysis cycles.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements periodic operation of the electrolytic sanitation system, running electrolysis cycles at intervals rather than continuously. This periodic action maintains sanitation effectiveness by periodically generating chlorine while significantly reducing cumulative electrode wear compared to continuous operation.

Inventive Principle:
Principle #19Periodic action

3Duration of action of stationary object

If polarity reversal is implemented at set time intervals, then electrode wear is mitigated, but electrode life is not maximized due to inefficient wear distribution

Engineering Contradiction:
Improveelectrode lifespanVSAvoidelectrode efficiency
Core Design Contradiction:
Duration of action of stationary objectVSProductivity

Solution Approach 1:

The patent employs a controller that monitors system operation and manages polarity reversal based on operational parameters. This feedback-controlled polarity reversal optimizes electrode wear distribution by switching polarities at strategically determined intervals, maximizing electrode lifespan while maintaining sanitation productivity.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent implements periodic polarity reversal of the electrodes during operation. By systematically reversing the polarity at set intervals, the system distributes wear more evenly across both electrodes, extending their combined lifespan while maintaining efficient chlorine generation capability.

Inventive Principle:
Principle #19Periodic action

4Manufacturing precision

If electrodes are replaced by trained technicians, then replacement accuracy is ensured, but maintenance cost and inconvenience increase

Engineering Contradiction:
Improvereplacement accuracyVSAvoidmaintenance convenience
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent designs the electrolytic cell with user-accessible electrodes that can be easily removed and replaced by the spa owner without requiring trained technicians. This self-service design maintains replacement accuracy through simple, foolproof connections while significantly improving maintenance convenience and reducing service costs.

Inventive Principle:
Principle #25Self-service

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 system reduces energy consumption, extends electrode life, and allows for user-maintained components, decreasing the need for frequent professional service and electrode replacement.

Implementation Method 1

Electrolytic sanitation systems pass electrical current between electrodes, comprising one or more cathodes and one or more anodes, and causes salt molecules (NaCl) in the water to split into sodium (Na+) and chlorine (Cl-) ions

Methodology Applied
Scientific EffectElectrolysis: Electrolysis

Implementation Method 2

The electrolytic process causes wear on the electrodes, increasing electrical impedance thereof

Methodology Applied
Scientific EffectElectrical impedance: Electrical Resistance

Data Source

PatentEP3962541B1Water sanitation system and method
Publication Date: 2025.03.26 SPA LOGIC INC
  • EP3962541B1 patent drawingFigure 1A
  • EP3962541B1 patent drawingFigure 1B
  • EP3962541B1 patent drawingFigure 2A~2D

AI summary

Systems and methods for electrolytic spa sanitation are provided which control electrodes in a manner that extends the use of electrodes, reducing the frequency of replacement of electrodes. The system also incorporates electrodes that can be easily replaced by a user, further reducing the need to maintenance by trained service personnel. Systems and methods use measurements from ORP, pH, and temperature sensors to determine the amount of sanitizer necessary to be produced from the electrodes. The electrodes are capable or acting as either an anode or a cathode.