Dielectric Air Purification Filter for Stable Electrostatic Collection

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Solution Overview

Problem

Existing air purifiers face challenges in effectively removing oil particles and maintaining electrostatic collection efficiency over time due to insulation issues and complex power supply structures, particularly when filters are bent or rolled into cylindrical shapes.

Innovation Solution

An air purification filter with a dielectric filtering layer and laminated electrode layers, coupled with a connection module that ensures stable insulation and even power distribution, allowing for flexible mounting directions and improved electrostatic collection performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stress or pressure

If a thin filter is used to reduce pressure loss, then pressure loss is reduced, but insulation distance between electrodes becomes too short causing current flow and fire risk

Engineering Contradiction:

Improvepressure lossVSAvoidinsulation performance

Core Design Contradiction:

Stress or pressureVSReliability

Solution Approach 1:

An insulating layer is introduced as an intermediary between the positive and negative electrodes. This insulating layer prevents direct contact and current flow between electrodes while allowing the thin filter structure to maintain low pressure loss. The insulating layer acts as a mediator that resolves the contradiction between thin filter design and insulation requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If opposite ends of rolled filter are energized to create electrostatic field, then collection efficiency is improved, but insulation distance becomes insufficient causing current flow

Engineering Contradiction:

Improvecollection efficiencyVSAvoidinsulation performance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The insulating layer serves as a mediator between the energized electrode ends, preventing current flow while allowing the electrostatic field to be generated for improved collection efficiency. This enables the rolled filter configuration to maintain both high productivity and reliable insulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Area of stationary object

If multiple straight filters are connected to provide V-shaped filter module, then filter coverage is improved, but power supply structure becomes very complicated requiring high voltage for each electrode

Engineering Contradiction:

Improvefilter coverageVSAvoidpower supply structure

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

Multiple straight filters are merged into a single integrated filter structure with unified electrode connections. This merging simplifies the power supply structure by reducing the number of separate high voltage connections needed, while still providing extensive filter coverage through the combined straight filter configuration.

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If filter is bent and installed between flat screen electrodes, then filter flexibility is improved, but very high voltage is required and installation alignment becomes inconvenient

Engineering Contradiction:

Improvefilter flexibilityVSAvoidinstallation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The filter employs flexible electrode structures that can be bent and conform to different installation configurations. This flexibility allows the filter to be installed in various orientations without requiring precise alignment, reducing installation complexity while maintaining the ability to generate the necessary electrostatic field through controlled voltage application.

Inventive Principle:

Principle #30Flexible shells and thin films

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 solution provides enhanced insulation and power supply stability, maintaining electrostatic force and collection efficiency, reducing pressure loss, and facilitating easy installation of the filter in air purifiers.

Implementation Method 1

a dielectric filter is electrostatically treated during manufacturing so as to have electrostatic property. The filter treated electrostatically in this manner can electrically adsorb minute particles

Methodology Applied

Scientific EffectElectrostatic adsorption: Electrostatics

Implementation Method 2

a pair of electrode layers laminated respectively on opposite sides of the filtering layer and configured to receive power so as to generate polarization through an electric field in the filtering layer

Methodology Applied

Scientific EffectElectric field: Electric Field

Data Source

PatentUS12409458B2Air purification filter and air purifier including same

Publication Date: 2025.09.09 LG ELECTRONICS INC

AI summary

Proposed are an air purification filter (1) and an air purifier (200) including the same. The air purification filter includes a filtering layer (30) configured as a dielectric which collects minute particles, a pair of electrode layers (50, 70) laminated on opposite sides of the filtering layer (30), respectively, and configured to receive power so as to generate polarization through an electric field in the filtering layer (30), and a connection module (100, 100′). The connection module (100, 100′) is coupled to at least any one of the opposite ends of the pair of electrode layers (50, 70) such that the coupled portion of the connection module is insulated from an outside thereof and is electrically connected with an external power supply part.