Steam Iron Tip Steam Routing With Dual-Chamber Pressure Control

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Solution Overview

Problem

Existing steam irons face challenges in optimizing steam application options without increasing weight or cost, particularly in providing sufficient steam at the ironing tip while maintaining ease of use and handling.

Innovation Solution

A steam iron design that uses a common steam generation chamber for both soleplate and jet steam outlet functions, with a mechanism allowing for continuous steam generation and a burst of steam, utilizing a drip valve and water pump to control steam output, and labyrinthine passages for increased steam speed, allowing the same actuating button to control both functions for space-saving and user-friendly operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a common steam generation chamber is used for both soleplate and jet steam outlet functions, then device complexity is reduced and space is saved, but steam delivery to the ironing tip area is insufficient

Engineering Contradiction:
Improvesteam generation chamber configurationVSAvoidsteam delivery to ironing tip
Core Design Contradiction:
Device complexityVSQuantity of substance

Solution Approach 1:

The steam generation chamber is segmented into a first steam generation chamber for continuous steam supply to the soleplate and a second steam generation chamber for burst steam supply to the jet outlet. This segmentation allows each chamber to be optimized for its specific function, ensuring sufficient steam delivery to the ironing tip area while maintaining overall system simplicity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between continuous steam generation mode (first chamber) and burst steam generation mode (second chamber) based on operational needs. The control unit activates the second chamber when jet steam is required, providing dynamic adaptability that ensures sufficient steam delivery to the ironing tip area while maintaining simple chamber configuration during normal operation.

Inventive Principle:
Principle #15Dynamics

2Quantity of substance

If separate steam generation chambers are used for soleplate and jet steam outlet functions, then steam delivery to the ironing tip is improved, but device complexity and weight increase

Engineering Contradiction:
Improvesteam delivery to ironing tipVSAvoidsteam generation chamber configuration
Core Design Contradiction:
Quantity of substanceVSDevice complexity

Solution Approach 1:

The steam generation system is segmented into two functional chambers: a first chamber dedicated to continuous steam supply for the soleplate and a second chamber dedicated to burst steam supply for the jet outlet. This segmentation ensures optimized steam delivery to the ironing tip area while keeping each chamber relatively simple in design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Both steam generation chambers share common control elements and can operate independently or in combination. The control unit manages both chambers, and the steam distribution system routes steam from either chamber to the appropriate outlet, providing multi-functionality that reduces overall system complexity despite having separate chambers.

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

3Speed

If water is injected into the second steam generation chamber via water pump, then steam burst speed is increased, but weight and acquisition cost increase

Engineering Contradiction:
Improvesteam burst speedVSAvoidiron weight
Core Design Contradiction:
SpeedVSWeight of moving object

Solution Approach 1:

The system replaces the electric pump mechanism with a manual water injection system. Users can manually inject water into the second steam generation chamber through a fill opening, eliminating the need for a motor-driven pump. This substitution significantly reduces weight and acquisition cost while still enabling burst steam generation when water is injected and rapidly evaporated.

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

Solution Approach 2:

The second steam generation chamber is designed to be manually refillable through a fill opening, allowing users to service the system themselves. This self-service approach eliminates complex automated pumping mechanisms, reducing both weight and cost while maintaining the capability for rapid steam burst when needed.

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 design enhances steam application efficiency by directing at least 60% of the steam to the ironing tip area, improving wrinkle-smoothing effectiveness while maintaining ease of use and reducing weight and cost compared to prior designs.

Implementation Method 1

a heating element arranged in the steam chamber body, which has a steam generation chamber for steam generation

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 2

a heating element arranged in the steam chamber body, which has a steam generation chamber for steam generation

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 3

The first steam routing area can be continuously supplied with water via a drip valve for correspondingly continuous steam generation

Methodology Applied
Scientific EffectPressure differential flow: Pressure Gradient

Implementation Method 4

utilizing a drip valve and water pump to control steam output, and labyrinthine passages for increased steam speed

Methodology Applied
Scientific EffectFlow restriction and acceleration: Venturi Effect

Data Source

PatentEP1801281B1Steam iron
Publication Date: 2017.03.01 DE LONGHI BRAUN HOUSEHOLD GMBH
  • EP1801281B1 patent drawing
  • EP1801281B1 patent drawing
  • EP1801281B1 patent drawing

AI summary

A steam iron has steam outlets (19) in the sole, augmented by additional outlets (47) near the tip of the sole and a steam jet (32) spraying ahead of the iron. The distribution can be altered by the setting of a control knob (14) and a plastic membrane valve (34). The steam for the tip outlets (47) and the jet (32) is generated in a common secondary chamber (26) and fed through distribution branches (29, 36). Water is supplied from the main tank (16) by a manually operated pump (24). The steam for the sole outlets (19) is generated in a main chamber (45), with a continuous water supply from a drip valve, optionally augmented by a push button valve. The secondary chamber (26) contains labyrinth passages to generate a higher pressure. About 75 % of the steam generated there is fed to the tip outlets (47).