Dryer Lint Filter Cleaning for Continuous Airflow

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Solution Overview

Problem

Conventional dryers require manual filter cleaning to remove foreign materials, which is inconvenient and can lead to reduced airflow and increased risk of firing due to accumulated moisture.

Innovation Solution

A foreign material removing apparatus with a filtering unit and a cleaning device that automatically separates foreign materials from the filter by relative movement, storing them in a dedicated case for easy removal, ensuring continuous airflow and preventing firing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual filter cleaning is required, then foreign materials can be removed from the filter, but user convenience deteriorates and maintenance time increases

Engineering Contradiction:
Improveairflow maintenanceVSAvoidfilter cleaning convenience
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The cleaning device automatically cleans the filter without user intervention. The cleaning unit includes a cleaning member that contacts the filter surface and removes foreign materials automatically during or after the drying cycle, eliminating the need for manual cleaning operations while maintaining airflow reliability

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The cleaning operation is performed in advance or automatically after the drying cycle before the filter becomes completely blocked. The control unit activates the cleaning device at predetermined intervals or based on usage conditions, preventing airflow degradation before it occurs

Inventive Principle:
Principle #10Preliminary action

2Reliability

If foreign materials accumulate in the filter, then filtering function is maintained, but airflow is blocked and firing risk increases

Engineering Contradiction:
Improvedrying safetyVSAvoidair circulation efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The control unit monitors the drying operation and activates the cleaning device based on operational conditions. The system provides feedback control by detecting when cleaning is needed and automatically initiating the cleaning process, balancing filtering function with airflow maintenance to prevent firing risks

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The cleaning device operates periodically or continuously during the drying cycle to maintain filter permeability. By maintaining continuous or periodic cleaning action, the system ensures uninterrupted airflow and prevents the accumulation of foreign materials that could block air circulation and cause firing

Inventive Principle:
Principle #20Continuity of useful action

3Productivity

If filter cleaning frequency is increased, then airflow is maintained, but user time and effort increase

Engineering Contradiction:
Improveairflow maintenanceVSAvoidcleaning time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The automatic cleaning device performs filter maintenance without requiring user time or effort. The cleaning unit is activated automatically by the control unit based on drying cycle duration and conditions, completely eliminating the time users would otherwise spend on manual filter cleaning while maintaining optimal airflow

Inventive Principle:
Principle #25Self-service

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 automatic filter cleaning system enhances user convenience by eliminating the need for frequent filter cleaning and maintains optimal airflow, reducing the risk of firing and improving dryer performance.

Implementation Method 1

the foreign materials of the filter are separated from the filter by friction generated due to relative movement of the cleaning device and the filter

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS9062410B2Dryer and foreign material removing apparatus thereof
Publication Date: 2015.06.23 LG ELECTRONICS INC
  • US9062410B2 patent drawing
  • US9062410B2 patent drawing
  • US9062410B2 patent drawing

AI summary

The embodiment proposes a foreign material removing apparatus for a dryer. The foreign material removing apparatus for a dryer according to an embodiment of the present invention includes: a case including an air introduction hole into which air discharged from a drum is introduced, an air discharge hole, and a foreign material discharge hole; a filtering unit that is provided in the case and includes a filter; and a cleaning unit that moves relatively to the filter and has one or more cleaning devices for removing the foreign materials accumulated in the filter.