Method for cleaning a steam iron and steam iron station

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Solution Overview

Problem

Existing methods for cleaning steam irons are inefficient and prone to incorrect operation, leading to incomplete removal of limescale deposits and potential damage to the device and ironed items.

Innovation Solution

A method that automatically switches off or reduces the soleplate heating device and increases steam pressure, using high-pressure steam to blast off limescale deposits from the steam chamber and outlets, ensuring effective cleaning without user intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual cleaning methods are used (switching off heating, setting temperature controller to low, opening steam valve), then the cleaning process can be initiated, but the cleaning is inefficient and prone to incorrect operation

Engineering Contradiction:
Improveease of operationVSAvoidreliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The steam iron automatically initiates and executes the cleaning cycle when limescale deposits are detected, without requiring manual user intervention. The control unit autonomously coordinates the heating device, steam generator, and steam valve to perform the cleaning process, making the system self-servicing and eliminating operational errors.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

A sensor detects limescale deposits in the steam chamber and provides feedback to the control unit. Based on this feedback, the control unit automatically activates the cleaning sequence, creating a closed-loop control system that responds to actual device conditions and ensures reliable cleaning execution.

Inventive Principle:
Principle #23Feedback

2Productivity

If high-pressure steam is used to blast off limescale deposits, then cleaning effectiveness is improved, but the risk of incorrect operation increases

Engineering Contradiction:
Improvecleaning effectivenessVSAvoidease of operation
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The system automatically generates high-pressure steam for cleaning when limescale is detected, eliminating the need for manual user actions. The control unit manages the entire high-pressure steam generation and release process, ensuring both cleaning effectiveness and operational simplicity.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The manual mechanical operation of cleaning (user actions) is replaced by an automated steam-based cleaning system. The control unit substitutes human intervention with an automated sequence that generates high-pressure steam to remove limescale, improving both effectiveness and ease of operation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If the heating device is switched off manually to start cleaning, then the cleaning process can begin, but the process is complex and error-prone

Engineering Contradiction:
Improvedevice complexityVSAvoidreliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The control unit automatically manages the heating device shutdown and cleaning sequence initiation without requiring user coordination of multiple steps. The system self-manages the complex sequence of operations, reducing the perceived complexity for the user and ensuring reliable execution.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The detection, decision-making, and execution functions are merged into a single automated control unit. Instead of requiring separate manual actions for each step (detecting limescale, switching off heating, opening steam valve), the control unit combines these functions into one integrated automated process.

Inventive Principle:
Principle #5Merging (Combining)

4Duration of action of stationary object

If limescale deposits are not removed, then the steam iron can continue operating, but deposits reduce service life and can damage items being ironed

Engineering Contradiction:
Improveservice lifeVSAvoidharmful factors
Core Design Contradiction:
Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

A sensor continuously monitors the steam chamber for limescale deposits and provides feedback to the control unit. When deposits are detected, the system automatically initiates cleaning, creating a preventive maintenance loop that removes harmful deposits before they can damage the device or ironed items, thereby extending service life.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The steam iron autonomously monitors and cleans itself of limescale deposits, preventing the accumulation that would harm its service life and the quality of ironed items. This self-service capability ensures continuous operation without manual intervention to prevent damage.

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

This approach ensures reliable and efficient cleaning of the steam iron, reducing the risk of incorrect operation and maintaining the device's functionality while preventing stains on ironed items.

Implementation Method 1

a soleplate with a heating device for heating the soleplate

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

a steam generator for providing steam under a steam pressure for introduction into the steam chamber

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 3

cold water is pumped into the hot steam chamber and steam outlets, so that a thin layer of limescale on the walls of the steam chamber and in the steam outlets is blown off by the resulting thermal shock

Methodology Applied
Scientific EffectThermal shock: Thermal Shock

Data Source

PatentEP2963173B1Method for cleaning a steam iron and steam iron station
Publication Date: 2017.11.15 BSH HAUSGERATE GMBH
  • EP2963173B1 patent drawingFigure 1~2
  • EP2963173B1 patent drawingFigure 3

AI summary

In a method for cleaning a steam iron (20), which comprises a soleplate (1) with a heating device for heating the soleplate (1) and a steam chamber (3) arranged above the soleplate (1), the soleplate (1) has at least one steam outlet (4) for exiting steam from the steam chamber (3) for treating an item to be ironed, and wherein the steam iron (20) is assigned a steam generator for providing steam under a steam pressure for introduction into the steam chamber (3). after the start of a cleaning program, the heating device is automatically switched off or reduced, the steam pressure of the steam provided is automatically increased and the steam chamber (3) is subjected to the steam provided under increased steam pressure. The invention also relates to a correspondingly designed steam ironing station (10). The invention makes it possible to ensure that the steam iron is cleaned effectively and to avoid operating errors. This improves the operability of the steam iron with regard to the cleaning process and makes it easier to maintain the operability of the steam iron.