Steam Generator Water Flow Control for Uniform Laundry Treatment
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Solution Overview
Problem
Existing laundry treatment machines with steam generating devices face challenges in providing uniform and gentle steam distribution, often resulting in uneven treatment and undesirable droplet formation during steam injection.
Innovation Solution
A method that dynamically adjusts the water flow rate into the steam generating device based on temperature, allowing for continuous and modulated steam generation, with a control device regulating the flow to maintain a stable temperature and prevent cooling, ensuring uninterrupted steam supply and even laundry treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water is admitted into the steam generator at a high flow rate to ensure continuous steam supply, then steam generation is maintained, but the steam generator cools down and temperature stability deteriorates
Solution Approach 1:
The patent applies dynamic control by continuously adjusting the water flow rate based on real-time temperature feedback from the steam generator. The control device modulates the water admission dynamically rather than using a fixed flow rate, allowing the system to adapt to changing thermal conditions and maintain temperature stability while ensuring continuous steam supply.
Solution Approach 2:
The patent implements a feedback control mechanism where a temperature sensor continuously monitors the steam generator temperature and feeds this information back to the control device. The control device then adjusts the water flow rate accordingly, creating a closed-loop system that maintains temperature stability while preventing generator cooling during steam generation.
2Productivity
If the heater operates at high power to generate steam quickly, then steam production increases, but power consumption increases
Solution Approach 1:
The heating element operates dynamically with variable power output rather than at constant high power. The control device adjusts the heating power based on real-time temperature feedback and steam generation requirements, enabling the system to maintain adequate steam production while minimizing energy consumption during steady-state operation.
Solution Approach 2:
The patent changes the operating parameters of the heating element by continuously adjusting its power output level. Instead of operating at fixed high power, the heating element's power parameter is modulated according to the actual steam generation needs and temperature conditions, reducing overall energy consumption while maintaining productivity.
3Temperature
If water flow rate is increased to prevent generator cooling, then temperature stability improves, but droplet formation increases
Solution Approach 1:
The water flow rate is controlled dynamically at optimized levels rather than being continuously high. The control device adjusts the flow rate in real-time based on temperature feedback, maintaining temperature stability while preventing excessive water flow that would cause droplet formation. This dynamic optimization balances temperature control with steam quality.
Solution Approach 2:
The patent optimizes the water flow rate parameter to specific ranges that prevent both generator cooling and droplet formation. By carefully controlling the water flow parameter within optimal boundaries rather than using high flow rates, the system achieves temperature stability while minimizing harmful droplet generation in the steam.
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 enables uniform and gentle steam treatment, reducing power consumption and minimizing droplet formation, resulting in efficient and even laundry processing.
Implementation Method 1
a device for generating steam, which comprises a heating element
Implementation Method 2
heating and evaporating the water that is let in
Data Source
Figure 1
Figure 2
AI summary
The method involves activating a heating element (26) until temperature of a steam generating device (12) reaches a predetermined upper limit. Water is introduced into a tank (22) of the device at predetermined flow rate, and temperature of the device is measured. The flow rate of the water is reduced when the temperature of the device drops below a lower limit. The flow rate of the water is increased when the temperature of the device increases to a value above the lower limit and below the upper limit. The element is continuously operated at a predetermined power level. An independent claim is also included for a laundry appliance comprising housing.