Steam Boiler Control Unit for Ironing Devices
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Solution Overview
Problem
Steam ironing systems require a balance between short heating times and efficient energy storage for powerful steam bursts, with existing technologies often compromising between these demands.
Innovation Solution
A method and control unit for regulating the steam boiler's liquid level and temperature, using a heating signal to maintain a predetermined minimum and maximum fill level, with excess liquid recirculated for efficient energy use and reduced waiting times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the steam boiler is filled with a large quantity of water to increase energy storage volume, then the energy storage volume is improved, but the heating time increases
Solution Approach 1:
The water quantity in the steam boiler is segmented into two distinct levels: a minimum fill level for rapid heating and a maximum fill level for energy storage. The control unit manages these segmented levels independently, allowing the system to operate with minimal water for quick steam generation and switch to maximum water storage when energy reserves are needed, thereby resolving the contradiction between heating time and energy storage volume.
Solution Approach 2:
The water fill level in the steam boiler is made dynamic rather than static. The control unit continuously adjusts the water quantity between minimum and maximum levels based on real-time operational requirements, steam consumption patterns, and temperature conditions. This dynamic adjustment enables the system to optimize between rapid heating mode (minimal water) and high energy storage mode (maximum water), eliminating the fixed trade-off between heating time and energy storage.
2Loss of time
If the steam boiler operates with minimal water to reduce heating time, then the heating time is improved, but the energy storage capacity is reduced
Solution Approach 1:
The system performs preliminary actions by pre-heating water to the target temperature before steam generation begins. The control unit ensures that when steam is required, the water is already at the optimal temperature, eliminating the need to heat water during steam production. This preliminary heating action allows the system to operate with minimal water while maintaining rapid response capability, and the pre-heated water serves as ready-to-evaporate energy storage medium.
Solution Approach 2:
The system changes operational parameters dynamically, switching between different water quantity regimes (minimal vs. maximum) and temperature sets based on steam demand patterns. When rapid steam generation is needed, the system operates with minimal water at high temperature; when energy storage is prioritized, it operates with maximum water. This parameter change strategy resolves the contradiction by making both heating time and energy storage capacity achievable through appropriate parameter selection.
3Quantity of substance
If water is continuously refilled to maintain maximum fill level, then the energy storage volume is improved, but the process complexity increases
Solution Approach 1:
The control unit implements feedback control by continuously monitoring the actual water level in the steam boiler and comparing it with the target minimum and maximum fill levels. Based on this feedback, the control unit automatically adjusts the water refilling process, opening inlet valves or activating pumps only when necessary to maintain the optimal water level. This feedback mechanism simplifies the refilling process complexity by making it automated and condition-based rather than continuous or manual.
Solution Approach 2:
The steam boiler system performs self-service water management through automated control. The control unit independently monitors water levels, determines when refilling is needed, and executes the refilling operation without external intervention. The system self-regulates the water quantity to maintain optimal levels for energy storage, eliminating the need for complex manual monitoring and adjustment processes while ensuring continuous availability of stored energy.
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 rapid steam generation with high output and reduced energy consumption, ensuring powerful bursts of steam while minimizing heating time and fluid usage.
Implementation Method 1
providing a heating signal to an interface to a heating device of the steam boiler in order to bring about heating of the liquid
Implementation Method 2
reading in a temperature signal via an interface to a temperature sensor, wherein the temperature signal represents a temperature of the liquid in the steam boiler
Implementation Method 3
Evaporated water is either replenished by a pump to maintain a relatively constant fill level
Implementation Method 4
The steam boiler is filled with a varying amount of water. Evaporated water is either replenished by a pump
Implementation Method 5
These storage mechanisms provide a lot of energy for very powerful bursts of steam
Implementation Method 6
The pressure buildup in the boiler stores energy in two ways: firstly, in the form of water vapor as a compressed gas
Implementation Method 7
secondly, through the superheating of the liquid water, although this part is by far the predominant factor
Data Source
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AI summary
The invention relates to a method for providing steam in a steam boiler (114) for an ironing device (100). It comprises a step of providing a control signal to a control device of the steam boiler (114) to establish a predetermined minimum fill level of a liquid to be evaporated in the steam boiler (114). It further comprises a step of providing a heating signal to a heating device of the steam boiler (114) to heat the liquid, and a step of reading a temperature signal by means of a temperature sensor, wherein the temperature signal represents the temperature of the liquid located in the steam boiler (114).Furthermore, the method comprises a step of providing an inlet signal to the regulating device to admit a predetermined quantity of liquid into the steam boiler (114) when the temperature signal indicates a setpoint temperature, and a step of repeating the steps of reading the temperature signal and providing the inlet signal until the liquid in the steam boiler (114) has a predetermined maximum fill level and the temperature signal indicates the setpoint temperature.