Laundry Appliance Micro-Particle Filtration for Microfiber Capture

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Solution Overview

Problem

Conventional filtration systems in laundry appliances are inadequate in separating micro-sized particles, such as microfibers, which often pass through and contaminate the fluid used in laundry cycles, leading to inefficiencies and potential environmental issues.

Innovation Solution

A micro-particle filtration system is integrated into the laundry appliance, featuring a dynamic filter with a rotor generating centrifugal flow and a hydrophobic material to capture and collect micro-sized particles, which are then directed to a removable collection chamber using a secondary flow mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional filtration systems are used in laundry appliances, then the device complexity is low, but the manufacturing precision of particle separation is insufficient for micro-sized particles

Engineering Contradiction:
Improveparticle separation precisionVSAvoidfiltration system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The filtration system is divided into two distinct stages: a primary filtration system for larger particles and a micro-particle filtration system for micro-sized particles. This segmentation allows each subsystem to be optimized for its specific function, achieving high precision particle separation while managing overall device complexity through modular design

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The micro-particle filtration system introduces a secondary flow dimension by creating a secondary flow mechanism that moves micro-particles from the micro-particle filter to a collection chamber. This additional flow path enables effective micro-particle removal without significantly increasing the complexity of the main filtration system

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If a micro-particle filtration system is added to the laundry appliance, then the particle separation precision is improved, but the device complexity increases

Engineering Contradiction:
Improvemicro-particle separation precisionVSAvoidfiltration system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The micro-particle filtration system is integrated with the existing primary filtration system and recirculating fluid path. The micro-particle filter is positioned within the existing fluid path downstream of the primary filter, and the secondary flow mechanism utilizes the recirculating fluid to transport micro-particles to the collection chamber, merging multiple functions into a unified system

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The secondary flow mechanism utilizes the recirculating process fluid itself to transport micro-particles from the micro-particle filter to the collection chamber. The system uses its own operational fluid to perform the additional function of micro-particle transport, eliminating the need for separate complex transport mechanisms

Inventive Principle:
Principle #25Self-service

3Object-generated harmful factors

If micro-sized particles are not separated from process fluid, then the device complexity is low, but the harmful factors generated by the process increase due to fluid contamination

Engineering Contradiction:
Improvefluid contaminationVSAvoidfiltration system complexity
Core Design Contradiction:
Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The micro-particle filtration system extracts and removes micro-sized particles from the process fluid through the micro-particle filter. The separated micro-particles are then transported to a collection chamber for disposal, effectively removing the harmful contaminating substances from the recirculating fluid

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The system discards micro-sized particles by collecting them in a collection chamber that can be periodically emptied. The process fluid, after having micro-particles removed, is recirculated back into the system, recovering the clean fluid for continued use and reducing waste

Inventive Principle:
Principle #34Discarding and recovering

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 effectively separates and collects micro-sized particles, maintaining fluid quality and preventing contamination, with the ability to recycle the filtered fluid, enhancing the appliance's performance and environmental responsibility.

Implementation Method 1

a dynamic filter with a rotor generating centrifugal flow

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

a hydrophobic material to capture and collect micro-sized particles

Methodology Applied
Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS12571154B2Laundry appliance having a micro-particle filtration and collection system
Publication Date: 2026.03.10 WHIRLPOOL CORP
  • US12571154B2 patent drawing
  • US12571154B2 patent drawing
  • US12571154B2 patent drawing

AI summary

A laundry appliance includes a tub that is positioned within an outer cabinet. A processing space is defined within the tub. A fluid path delivers a process fluid through the tub for treating articles within the processing space. A micro-particle filter is positioned within the fluid path. The micro-particle filter separates micro-sized particles from the process fluid. A secondary flow mechanism delivers the micro-sized particles from the micro-particle filter to a removable collection chamber.