Steam generator
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Solution Overview
Problem
Existing steam generators for domestic use are limited by the large footprint of the steam generator unit, require a long time to reach operating temperature, and suffer from limescale buildup which reduces efficiency and lifespan.
Innovation Solution
A steam generator design featuring a heating chamber with a vertically oriented heating element, divided into an upper and lower portion, where the upper portion is wider to accommodate a baffle or mesh filter preventing water droplets from entering the steam outlet, and a reservoir system for continuous water supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional underfloor heating element is used, then the heating element can effectively heat the water, but the steam generator unit has a large footprint
Solution Approach 1:
The heating element is repositioned from a horizontal underfloor arrangement to a vertical sidewall arrangement. This dimensional change allows the heating surface to be utilized more efficiently within the same footprint, reducing the overall area required for the steam generator unit while maintaining effective heating capability.
2Reliability
If thermal cut-out circuitry is used to prevent overheating, then the heating element is protected, but repeated dry boiling causes increased limescale formation
Solution Approach 1:
The patent replaces the thermal cut-out circuitry (electrical/mechanical system) with a level sensor system that detects water levels and controls the heating element operation accordingly. This substitution allows for more precise control, preventing the heating element from operating in a dry state and thereby reducing limescale formation while still protecting against overheating.
3Loss of time
If the heating element heats water quickly, then steam generation time is reduced, but the heating element operates at higher temperatures causing increased damage
Solution Approach 1:
The patent implements a feedback control system using a level sensor that continuously monitors the water level in the heating chamber. The sensor signals control circuitry that adjusts the heating element operation, ensuring the element only operates when adequate water is present. This feedback mechanism enables efficient heating while preventing excessive temperature operation, thus extending the heating element's operational life.
4Productivity
If deposits build up on the heating element, then they create a thermally insulating barrier, but removing deposits requires disassembling the heating element
Solution Approach 1:
The patent segments the heating chamber from the heating element by providing a removable heating chamber that can be separated from the permanent housing. This segmentation allows the heating chamber to be easily removed for cleaning and maintenance, enabling users to access and remove deposits from the heating element without disassembling the entire appliance, thus simplifying maintenance while maintaining heating efficiency.
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 reduces the overall size of the steam generator, speeds up the time to steam generation, and minimizes limescale buildup by directing deposits away from the heating element, thereby enhancing efficiency and extending the appliance's lifespan.
Implementation Method 1
a steam generator which includes a heating chamber which is configured to hold water and to heat the water to a temperature sufficient to generate steam
Implementation Method 2
heat the water to a temperature sufficient to generate steam
Data Source
AI summary
A steam generator including a heating chamber for heating water to generate steam, with a sidewall of the heating chamber being a heating element. The steam generator may be installed in an appliance, and may be removably installed in the appliance.