Steam Drum Drying Control for Laundry Wrinkle Removal

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Solution Overview

Problem

Conventional laundry machines fail to completely remove wrinkles from clothes during the drying process, necessitating an additional ironing step, and there is a need for a method to easily and conveniently remove wrinkles during storage and use.

Innovation Solution

A laundry machine control method that involves supplying steam and hot air into the drum to dry clothes, with a heating step before steam generation, intermittent drum rotation, and water management to optimize wrinkle removal and prevention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional drying process is used, then drying efficiency is maintained, but wrinkles on clothes are not completely removed

Engineering Contradiction:
Improvewrinkle removal qualityVSAvoiddrying process completeness
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent applies preliminary action by heating the drum interior before the steam generation phase. The control unit operates the heating unit to raise the drum temperature to a predetermined level before introducing steam, ensuring the drum is pre-heated to optimize wrinkle removal effectiveness during the subsequent steam treatment.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements parameter changes by dynamically adjusting multiple parameters including drum rotation speed (varying between phases), temperature (heating to predetermined level before steam), steam supply amount, and phase timing. These parameter variations enable effective wrinkle removal while maintaining efficient drying performance.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If additional ironing process is added, then wrinkle removal quality is improved, but process time and complexity increase

Engineering Contradiction:
Improvewrinkle removal qualityVSAvoidtotal laundry processing time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent merges the drying process with wrinkle removal functionality by introducing a steam supply unit that operates during the drying cycle. The control unit coordinates the heating unit, steam supply unit, and drum rotation to simultaneously achieve drying and wrinkle removal, eliminating the need for separate ironing operations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The laundry machine is enhanced with multi-functionality by integrating wrinkle removal capability into the existing drying system. The steam supply unit and controlled heating/rotation system enable the machine to perform both drying and wrinkle removal functions within a single operational cycle.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Manufacturing precision

If steam is supplied continuously, then wrinkle removal effectiveness is improved, but energy consumption increases

Engineering Contradiction:
Improvewrinkle removal qualityVSAvoidsteam generation energy
Core Design Contradiction:
Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies periodic action by dividing the drying process into multiple phases (first drying phase, steam supply phase, second drying phase) with the steam supply unit operating during specific intervals. The control unit manages periodic steam supply rather than continuous operation, reducing energy consumption while maintaining wrinkle removal effectiveness.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The patent uses preliminary action by pre-heating the drum interior before steam supply. The heating unit operates first to raise the drum temperature to a predetermined level, preparing the environment for more efficient steam-based wrinkle removal and reducing the total energy required for the steam phase.

Inventive Principle:
Principle #10Preliminary action

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

Effectively prevents and removes wrinkles from clothes without the need for ironing, enhancing the convenience and efficiency of the laundry process.

Implementation Method 1

a steam generator (200) for generating steam

Methodology Applied
Scientific EffectPhase change (water to steam): Phase Change

Implementation Method 2

generating steam by heating water

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 3

a hot air heater (90) for heating air to generate high-temperature air

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 4

supplying hot air into the drum to dry clothes wetted by the steam

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 5

intermittent drum rotation

Methodology Applied
Scientific EffectMechanical motion:

Data Source

PatentUS7997006B2Laundry machine and control method thereof
Publication Date: 2011.08.16 LG ELECTRONICS INC
  • US7997006B2 patent drawing
  • US7997006B2 patent drawing
  • US7997006B2 patent drawing

AI summary

The present invention relates to a laundry machine and a control method thereof. The control method includes supplying steam, generated by a steam generator, into a drum, and supplying hot air into the drum to dry clothes wetted by the steam. According to the present invention, it is possible to effectively removing wrinkles on clothes.