Vacuum Dust Collection Filter Cleaning for Clog and Noise Control

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Solution Overview

Problem

Dust collection units in vacuum cleaners face inefficiencies in removing foreign objects from porous filters, leading to increased airflow resistance, motor overload, and noise generation due to clogged filters.

Innovation Solution

A dust collection unit with a filter-cleaning unit featuring rotating brushes and noise-preventing pads to effectively remove foreign objects from the outer surface of porous filters, improving airflow and reducing noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a porous filter unit is used to filter foreign objects, then filtering efficiency is improved, but airflow resistance increases and motor overload occurs when the filter surface is clogged

Engineering Contradiction:

Improvefiltering efficiencyVSAvoidmotor overload

Core Design Contradiction:

ReliabilityVSPower

Solution Approach 1:

The filter cleaning unit enables the filter unit to clean itself automatically during vacuum cleaner operation. The rotating brush members, driven by the motor through a transmission mechanism, continuously remove dust particles from the filter surface, allowing the filter to maintain its filtering efficiency without external intervention and prevent motor overload from excessive airflow resistance

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The filter cleaning operation runs continuously alongside the vacuum cleaning function. The motor simultaneously drives both the suction process and the filter cleaning mechanism, ensuring that dust particles are removed from the filter surface in real-time, maintaining optimal airflow conditions throughout the operating period rather than allowing clogging to accumulate

Inventive Principle:

Principle #20Continuity of useful action

2Power

If the motor power is increased to maintain suction force, then dust collection capability is improved, but noise generation increases

Engineering Contradiction:

Improvesuction forceVSAvoidnoise

Core Design Contradiction:

PowerVSObject-generated harmful factors

Solution Approach 1:

The patent converts the motor's rotational power, which could generate noise, into a beneficial cleaning function. The same motor drives both the suction process and the filter cleaning mechanism through a transmission mechanism, transforming potential noise pollution into effective dust removal from the filter surface, thereby maintaining efficient operation without excessive noise

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Ease of operation

If manual cleaning of the filter is performed, then dust removal is achieved, but cleaning effectiveness is poor when particles are tightly adhered

Engineering Contradiction:

Improvecleaning operationVSAvoiddust removal efficiency

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces manual mechanical cleaning with an automated mechanical cleaning system. Rotating brush members, driven by the motor through a transmission mechanism, provide continuous rotational friction against the filter surface, effectively removing tightly adhered dust particles that manual cleaning cannot dislodge, thereby significantly improving dust removal efficiency while maintaining ease of operation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enhances dust removal efficiency, prevents motor overload, and reduces noise by effectively clearing foreign objects from the porous filter surfaces, ensuring smooth airflow and user comfort.

Implementation Method 1

a filter-cleaning unit for removing the foreign objects clogging an outer surface of the porous filter unit

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

a plurality of brushes rotating around the porous filter unit to remove the foreign objects

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 3

a porous filter unit for filtering off the foreign objects greater than a predetermined volume while air containing the foreign objects passes through a porous filter

Methodology Applied

Scientific EffectPhysical Filtration: Filter (physical)

Implementation Method 4

a cyclone type separating foreign objects having heavy self-weight in cyclone airflow

Methodology Applied

Scientific EffectCyclone Separation: Cyclone Separation

Implementation Method 5

the foreign objects heavier than the air fall down to be stored a separated foreign object-storing chamber

Methodology Applied

Scientific EffectGravitation: Gravitation

Data Source

PatentUS7419520B2Dust collection unit and vacuum cleaner with the same

Publication Date: 2008.09.02 LG ELECTRONICS INC

AI summary

A dust collection unit for a vacuum cleaner includes a dust collection container for collecting foreign objects contained in air introduced therein, covers defining a top and bottom of the dust collection container, and a filter-cleaning unit having a plurality of brushes rotating around the porous filter unit to remove the foreign objects clogging the outer surface of the porous filter unit.