Iron Steam Flow Control Using Manual Shutter Mechanism
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Solution Overview
Problem
Existing irons lack the ability to modulate steam flow rate, leading to inefficient ironing times and high production costs due to complex temperature-dependent valves and bimetallic sheets.
Innovation Solution
A manually adjustable shutter mechanism allows users to continuously vary the steam flow rate by moving a shutter member relative to the water outlet, using a manual control element integrated into the iron handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bimetallic sheet valve is used to control water passage based on temperature, then water leakage is prevented, but the ironing time is increased and production cost rises
Solution Approach 1:
The patent extracts the temperature-dependent control function from the water passage control mechanism. Instead of using a bimetallic sheet that responds to temperature changes, the invention uses a simple manual selector switch that operates independently of temperature, allowing immediate water flow control when needed without waiting for thermal response.
Solution Approach 2:
The patent introduces a manual selector switch as an intermediary control element between the user and the water passage. This mediator allows direct mechanical control of the valve without relying on thermal feedback loops, thereby eliminating the time delay associated with bimetallic sheet response while maintaining reliable water flow control.
2Reliability
If a bimetallic sheet valve is used to control water passage, then water leakage is prevented, but production cost increases
Solution Approach 1:
The patent replaces the expensive bimetallic sheet valve with a simpler, cheaper manual selector switch and valve mechanism. The simplified design uses standard mechanical components that are less costly to manufacture and assemble, while still achieving the desired water flow control functionality without leakage issues.
Solution Approach 2:
The invention removes the complex temperature-sensitive bimetallic sheet component from the system, retaining only the essential water flow control function through a manual selector. This extraction of the thermal response element eliminates the need for expensive calibration and manufacturing processes associated with bimetallic sheets.
3Device complexity
If a selector with only closed and open positions is used, then the structure is simple, but steam flow rate cannot be modulated
Solution Approach 1:
The patent transforms the static binary selector (closed/open only) into a dynamic multi-position selector that can be adjusted to different intermediate positions. This allows the valve opening degree to be varied, enabling modulation of water flow rate and consequently steam flow rate, while maintaining a relatively simple mechanical structure.
Solution Approach 2:
The patent segments the single binary selection function into multiple discrete positions along the selector's range of motion. By dividing the control range into multiple selectable positions, the system achieves variable steam flow control without requiring a completely complex control mechanism, balancing simplicity with adaptability.
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
Enables intuitive and efficient steam control, reducing production costs and ironing time by allowing precise steam adjustment without complex temperature-dependent mechanisms.
Implementation Method 1
When the water comes into contact with the walls of the evaporation chamber it is heated until it reaches the boiling point, almost instantly, and becomes water steam
Implementation Method 2
the water coming from the tank is transformed into steam
Implementation Method 3
the aforesaid sheet deforms by bending on one side and opening the valve when a certain working temperature sufficient to instantly vaporize the water is reached and exceeded
Data Source
Figure 1~2
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AI summary
Iron (10) comprising a tank (13) suitable for containing water, steam generating means (17) configured to receive a part of said water from said tank (13) and to heat and evaporate the latter.