Lid Position Feedback Control for Stable Boiling in Cooking Pots
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Solution Overview
Problem
Cooking appliances with crucibles and lids struggle to maintain a consistent boiling process for liquid foods, especially when the lid is opened or closed, leading to energy inefficiencies and user reliance on guesswork due to lack of visibility and control over the cooking process.
Innovation Solution
A cooking device with a lid sensor that continuously monitors the lid's position and adjusts energy supply to maintain a constant boiling process, independent of the lid's position, using pre-determined energy parameters for different boiling strengths and incorporating sensors for energy loss compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lid is opened during cooking to access or observe the food, then the user can monitor and adjust the cooking process, but energy is lost and the boiling process becomes unstable
Solution Approach 1:
The control unit receives signals from the lid position sensor to detect whether the lid is open or closed, and automatically adjusts the heating element power accordingly. This feedback mechanism allows the system to respond to lid opening events and maintain optimal cooking conditions without user intervention.
Solution Approach 2:
The cooking device autonomously compensates for energy losses when the lid is opened by automatically increasing heating power. The system serves itself by detecting the lid position and adjusting energy input without requiring the user to manually adjust settings, thereby maintaining stable boiling while enabling easy access.
2Reliability
If the heating power is increased to maintain boiling when the lid is open, then the boiling process remains stable, but energy consumption increases
Solution Approach 1:
The heating power is dynamically adjusted based on the lid position. The control unit increases power when the lid is open and reduces it when closed, creating a dynamic energy input that adapts to real-time cooking conditions. This ensures reliable boiling stability only when necessary, rather than maintaining constant high power.
Solution Approach 2:
The system changes the heating power parameter in response to lid position changes. By detecting whether the lid is open or closed, the control unit modifies the energy input parameter to maintain optimal boiling conditions, thereby achieving reliability without excessive energy consumption.
3Loss of energy
If the lid is kept closed to save energy, then energy efficiency improves, but the user cannot observe or access the food during cooking
Solution Approach 1:
The lid position sensor provides continuous feedback to the control unit about whether the lid is open or closed. This enables the system to automatically adjust heating power based on the actual lid position, allowing users to open the lid for access or observation while the system compensates for energy losses, thus maintaining energy efficiency without sacrificing ease of operation.
4Adaptability or versatility
If manual monitoring of boiling process is required to adjust heating, then user control is maintained, but user effort and potential for error increase
Solution Approach 1:
The cooking device performs self-monitoring and self-adjustment of heating power based on lid position detection. The control unit automatically increases or decreases power input according to whether the lid is open or closed, eliminating the need for user intervention while maintaining optimal cooking conditions. This reduces user effort and potential for error while preserving cooking 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
This solution allows for precise control of boiling intensity and energy efficiency, reducing user intervention and errors, enabling automated energy-saving cooking processes with improved control over boiling strength and energy usage.
Implementation Method 1
The energy is usually introduced into the liquid food, i.e. the food to be cooked, through heating elements
Implementation Method 2
cooking devices that are used to prepare liquid dishes and have a crucible or cooking kettle have long been equipped with a lid
Data Source
Figure 1
AI summary
A cooking appliance (10) has a pot (11) and a lid (30) for the pot (11). In a first closed position, the lid (30) seals the interior of the pot (11) from above, and in a second closed position, it leaves the interior open at the top. Heating elements (20) and a cooking appliance control unit (40) are also provided. The cooking appliance (10) is intended for the preparation of foods (15) that are liquid or have a high liquid content. A sensor (41) is provided that detects the current closed position of the lid (30) on the pot (11). The sensor (41) communicates with the appliance control unit (40) via a wired or wireless connection. The appliance control unit (40) is designed to regulate or control the power supply to the heating elements (20) of the pot (11). The device control (40) is also designed in such a way that the control or regulation of the heating elements (20) is dependent on the information from the sensor (41).