Steam Generator Flow Restriction for Stable Water Supply Control
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Solution Overview
Problem
Existing fabric treatment appliances, such as washing machines and dryers, face challenges in efficiently controlling the water supply to steam generators, relying on pressure and electrical conduction sensors which may not be economical or reliable for consistent steam generation.
Innovation Solution
A flow controller is used to restrict the water flow rate to a steam generator from a household water supply, allowing a predetermined volume of water to be supplied for a specific time, and optionally resupplied based on steam generation rates, using a restrictor and valve configuration to maintain optimal water levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensors and electrical conduction sensors are used to control water supply to the steam generator, then water level monitoring capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the water level monitoring function from complex sensor systems and implements it through a simple float mechanism that directly actuates a valve, eliminating the need for pressure sensors and electrical conduction sensors while maintaining effective water level control
Solution Approach 2:
The float mechanism automatically detects water level and triggers the valve to open or close based on predetermined levels, creating a self-regulating system that does not require external sensors or complex control electronics
2Productivity
If unrestricted water flow is supplied to the steam generator, then water supply speed is improved, but water level control precision deteriorates
Solution Approach 1:
The float mechanism is pre-configured with markings indicating predetermined water levels (minimum and maximum), allowing the system to automatically control water flow to maintain precise water levels without requiring complex real-time measurement and adjustment systems
Solution Approach 2:
The float acts as an intermediary between the water level condition and the valve control, translating water level position into mechanical valve actuation, thereby enabling precise water level control while maintaining simple and fast water supply
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 method ensures a consistent and efficient supply of water to the steam generator, enhancing steam generation reliability and reducing the risk of damage by maintaining a stable water level, thus improving appliance performance.
Implementation Method 1
a flow controller fluidly coupled to the conduit and configured to effect a flow of water through the conduit at a restricted flow rate less than a flow rate of the household water supply
Implementation Method 2
a steam generator having a steam generation chamber and configured to supply steam to the fabric treatment chamber
Implementation Method 3
generating steam in the steam generator from the supplied water
Data Source
AI summary
A fabric treatment appliance comprises at least one of a tub and drum defining a fabric treatment chamber, a steam generator having a steam generation chamber and configured to supply steam to the fabric treatment chamber, and a conduit fluidly coupling a water supply to the steam generation chamber. The fabric treatment appliance can also include a flow controller and/or a flow meter fluidly coupled to the conduit to facilitate controlling the supply of water to the steam generation chamber. The disclosure provides methods of water supply control that can employ the flow controller and/or the flow meter.