Corrugated Electrode Dust Filter for Wider Electric Field Capture

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Solution Overview

Problem

Existing dust collecting filters face challenges in expanding the region where the electric field is activated, increasing the area and strength of the electric field, and simplifying the manufacturing process.

Innovation Solution

A dust collecting filter design featuring a ground electrode unit bent in a corrugated shape with bent and flat portions, and voltage electrode units disposed between these flat portions, with a dielectric film on both sides of the voltage electrodes, forming a wider electric field activation area and enhancing electric field strength while maintaining a thin structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the ground electrode unit is bent in a corrugated shape with multiple bent and flat portions, then the electric field activation area is expanded and collection efficiency is improved, but the device structure becomes more complex

Engineering Contradiction:
Improvecollection efficiencyVSAvoidelectrode structure complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The ground electrode unit is transformed from a flat two-dimensional structure to a three-dimensional corrugated structure with multiple bent and flat portions. This dimensional change increases the surface area and creates multiple regions where electric fields can be activated between the voltage electrode units and the ground electrode, thereby expanding the effective collection area without proportionally increasing the device footprint

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

Solution Approach 2:

The corrugated ground electrode unit divides the collection space into multiple segments through its bent and flat portions. Each flat portion creates a distinct region where voltage electrode units can generate electric fields, effectively segmenting the collection process into multiple active zones that work in parallel to improve overall collection efficiency

Inventive Principle:
Principle #1Segmentation

2Productivity

If the area and strength of the electric field are increased to improve collection efficiency, then foreign substance collection performance is enhanced, but the pressure loss of the dust collecting filter increases

Engineering Contradiction:
Improvecollection efficiencyVSAvoidpressure loss
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

By transforming the electrode structure into a three-dimensional corrugated configuration, the patent increases the electric field activation area without proportionally increasing the resistance to airflow. The corrugated structure allows electric fields to be established in multiple spatial regions simultaneously, enhancing collection efficiency while maintaining adequate air flow pathways

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

Solution Approach 2:

The corrugated structure with bent and flat portions creates dynamic variations in the electric field distribution and airflow patterns. The alternating bent and flat portions allow the electric field strength to be optimized in different regions while maintaining overall pressure balance, enabling enhanced collection performance without excessive pressure loss

Inventive Principle:
Principle #15Dynamics

3Productivity

If a thin ground electrode unit is used to reduce pressure loss and increase electric field strength, then collection efficiency is improved, but the manufacturing precision requirements increase

Engineering Contradiction:
Improvecollection efficiencyVSAvoidelectrode thickness control
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The ground electrode unit is designed as a thin, flexible component that can be formed into a corrugated shape. This thin-film approach reduces the overall thickness of the electrode unit, minimizing pressure loss and allowing for stronger electric fields to be generated with the same power input, while the flexible nature allows for easier manufacturing and forming into the required corrugated configuration

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 design increases the collection efficiency of foreign substances by widening the electric field area and strengthening the electric field, while simplifying the manufacturing process.

Implementation Method 1

a dust collecting filter generates an electric field through a voltage electrode to which a high voltage is applied and a counter electrode (ground electrode) grounded, and the electric field induces a dipole moment in a foreign substances in the air to polarize it, and then, the dust collecting filter collect the foreign substances through electrostatic attraction of electrodes

Methodology Applied
Scientific EffectElectrostatic attraction: Electrostatics

Implementation Method 2

The voltage electrode unit may include a dielectric film disposed on both sides of the voltage electrode

Methodology Applied
Scientific EffectDielectric property: Dielectric

Data Source

PatentUS12485429B2Dust collecting filter
Publication Date: 2025.12.02 LG ELECTRONICS INC
  • US12485429B2 patent drawing
  • US12485429B2 patent drawing
  • US12485429B2 patent drawing

AI summary

The present invention relates to a dust collecting filter. The dust collecting filter of the present invention may include a ground electrode unit bent in a corrugated shape to form a plurality of bent portions and a plurality of flat portions between each of the plurality of bent portions, and grounded; and a plurality of voltage electrode units disposed between each of the plurality of flat portions and spaced apart from each other, and to which a high voltage is applied.