Self-Cleaning Fountain with Photocatalytic Coating

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Solution Overview

Problem

Conventional decorative water displays and air purification systems face issues such as high water consumption, evaporation, splashing, biofouling, and the need for constant electricity, while existing water curtain systems are complex, prone to corrosion, and lack mobility and self-cleaning capabilities.

Innovation Solution

A mobile, self-cleaning water curtain apparatus using a low viscosity liquid like water to form a continuous film, incorporating a drape with a catch basin, conduit, and pump system, along with antimicrobial materials and UV light for sterilization, and a photocatalytic coating for self-purification, allowing for evaporative cooling and air filtration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional water curtain systems are used, then air purification function is provided, but device complexity increases and corrosion resistance deteriorates

Engineering Contradiction:
Improvecorrosion resistanceVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by specifying particular material compositions and coating properties for the water curtain system components. The use of corrosion-resistant materials with specific chemical compositions and protective coatings transforms the physical-chemical parameters of the system to achieve enhanced durability without requiring complex protective mechanisms.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent employs composite materials by combining corrosion-resistant base materials with protective coating layers. This creates a multi-layered structure where the base material provides structural integrity and the coating provides corrosion protection, resolving the contradiction between reliability and simplicity by integrating protection directly into the material composition rather than adding separate protective systems.

Inventive Principle:
Principle #40Composite materials

2Reliability

If conventional air purification systems are used, then air cleaning function is provided, but energy consumption increases

Engineering Contradiction:
Improveair purification efficiencyVSAvoidenergy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies self-service by designing a water curtain system that utilizes the natural flow of water and ambient air currents to achieve purification without requiring high-energy mechanical components. The system leverages gravity-driven water flow and natural convection to maintain continuous air cleaning, eliminating the need for energy-intensive pumps and forced air movement while sustaining effective purification.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical air movement systems with a gravity-based water curtain mechanism. Instead of using high-power fans or blowers to force air through filtration media, the system uses the physical barrier and scrubbing action of falling water to naturally intercept and remove particulates, substituting mechanical energy with gravitational potential energy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Shape

If decorative water displays are used, then aesthetic effect is provided, but water consumption increases and evaporation occurs

Engineering Contradiction:
Improveaesthetic display qualityVSAvoidwater loss
Core Design Contradiction:
ShapeVSLoss of substance

Solution Approach 1:

The patent applies multi-functionality by designing the water curtain to simultaneously serve aesthetic, air purification, and water conservation functions. The same water flow structure that creates the visually appealing curtain effect also serves as the primary mechanism for particle removal and is integrated with a recirculation system that minimizes water loss, allowing one system to fulfill multiple purposes without requiring separate components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements water recovery by incorporating a recirculation system that collects, filters, and reuses water from the curtain. Instead of allowing water to be discarded after a single use, the system continuously recovers and replenishes the water supply, significantly reducing overall water consumption while maintaining the aesthetic and functional performance of the display.

Inventive Principle:
Principle #34Discarding and recovering

4Reliability

If conventional water curtain systems are used, then air filtration is provided, but maintenance requirements increase due to biofouling

Engineering Contradiction:
Improveair filtration performanceVSAvoidmaintenance frequency
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The patent applies self-service by incorporating self-cleaning mechanisms into the water curtain system. The continuous flow of water through the curtain structure naturally prevents biofilm accumulation by mechanically flushing away organic matter before it can establish significant growth. This self-cleaning action maintains filtration performance without requiring manual intervention or complex maintenance schedules.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent employs periodic action through the continuous cyclic flow of water through the curtain system. This constant movement and replacement of water creates periodic flushing actions that prevent biofouling by disrupting the formation of biological films. The system uses the natural rhythm of water circulation to repeatedly clean the filtration surfaces, eliminating the need for separate maintenance cycles.

Inventive Principle:
Principle #19Periodic action

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 provides efficient evaporative cooling, reduces pollutants, and maintains a clean and attractive display with low maintenance and energy requirements, addressing the limitations of existing technologies.

Implementation Method 1

Water from a reservoir running over a dam, in such a manner as to create a dispersion, is noted to produce aesthetically and acoustically pleasing effects, including a cooling effect as well as a change in humidity in areas nearby.

Methodology Applied
Scientific EffectEvaporative cooling: Evaporative Cooler

Implementation Method 2

The lights (890) are configured to shine on the water (728) in the fountain to sterilize the water.

Methodology Applied
Scientific EffectUV sterilization: Light

Implementation Method 3

The structure (770) is coated with a photocatalytic coating (900). In operation, the lights (890) are configured to shine on the water (728) in the fountain to sterilize the water.

Methodology Applied
Scientific EffectPhotocatalysis: Photo-oxidation

Data Source

PatentEP3395450B1Air cleaning fountain
Publication Date: 2021.06.09 HAYDEN JOHN B
  • EP3395450B1 patent drawingFigure 1
  • EP3395450B1 patent drawingFigure 2A~2B
  • EP3395450B1 patent drawingFigure 3

AI summary

A self-cleaning fountain includes: a structure (770) having two ends, defining a first flow way for a first fluid to flow along, wherein the structure (770) defines holes (772) for allowing a second fluid to flow through the holes (772); a pump system (814) configured to pump the first fluid to a first end of the structure (770); a distributer (904) located at the first end of the structure (770) and configured to spray the first fluid received from the pump system (814) onto the structure (770); a catch basin located at a second end of the structure (770) for collecting the first fluid that has moved along the flow way to the catch basin; a photocatalytic coating (900) on the structure (7770); and a light source (890) configured to direct light on the photocatalytic coating (900).