System for detecting a possibility of boiling over and preventing said boiling over
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Solution Overview
Problem
Existing cooking vessel lids do not effectively prevent boiling over, leading to spills and inefficiencies in energy use, particularly on induction cooktops, and require constant supervision, which is inconvenient and sometimes impossible to manage.
Innovation Solution
A lid system equipped with sensors to detect initial and current content levels, using a controller to extend the lid height and create an aperture to facilitate heat exchange, thereby preventing boiling over and optimizing energy use across various cooktop types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a lid is placed on the cooking vessel to keep heat inside and reduce energy use, then energy efficiency is improved and boiling time is shortened, but the lid prevents normal venting and cooling causing foam to rise and spill over the edge
Solution Approach 1:
The lid height is made dynamically adjustable rather than fixed. The lid can be automatically raised when foam detection is triggered, creating variable headspace volume that adapts to cooking conditions. This resolves the contradiction by allowing the lid to maintain heat retention during normal cooking while preventing boil-over when foam rises.
Solution Approach 2:
The system changes the physical parameter of lid position (height above vessel rim) in response to detected foam levels. By monitoring conductivity changes that indicate foam presence, the system adjusts lid height to prevent boil-over while maintaining energy efficiency during normal operation.
2Stress or pressure
If a small aperture is provided in the lid to let excess pressure escape, then pressure venting is improved, but the aperture is not sufficient to prevent boiling over
Solution Approach 1:
Instead of relying on a fixed small aperture for pressure relief, the system dynamically adjusts lid height based on real-time foam detection. This creates a variable opening size that can accommodate large volumes of foam without allowing boil-over, resolving the limitation of fixed aperture designs.
Solution Approach 2:
The system introduces an intermediary detection mechanism (conductivity sensor) that monitors foam presence and triggers lid height adjustment. This intermediary system enables the lid to respond proactively to foam accumulation before boil-over occurs, rather than relying solely on passive aperture venting.
3Object-affected harmful factors
If constant personal supervision is maintained to detect and prevent boiling over, then boil-over prevention is improved, but convenience is reduced and rapid boil-over may still be missed
Solution Approach 1:
The system enables the cooking vessel to monitor and protect itself against boil-over. The conductivity sensor continuously detects foam presence and automatically triggers lid height adjustment without requiring human supervision. This self-service mechanism resolves the contradiction by providing reliable boil-over prevention while maintaining full cooking convenience.
Solution Approach 2:
The system implements continuous feedback through conductivity monitoring of the vessel contents. When foam alters the electrical conductivity characteristics, the system receives feedback and automatically adjusts lid height. This closed-loop feedback mechanism provides reliable boil-over prevention without requiring constant human attention.
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
The system automatically detects and prevents boiling over, reducing the risk of spills and energy wastage, while being applicable to all types of cooktops, enhancing cooking safety and efficiency.
Implementation Method 1
a conductivity sensor, configured to detect an electrical conductivity value of the vessel content
Implementation Method 2
a height actuator, configured to extend a height of the lid in response to a trigger event
Implementation Method 3
an aperture actuator, configured to create an aperture in a top of the lid in response to the trigger event
Data Source
AI summary
A system for detecting a possibility of boiling over and preventing said boiling over, the system comprising a vessel (101) having a lid (102), the lid (102) being characterised in that it is configured: to receive information on an initial level of a vessel content and a current level of the vessel content; and based on a difference between the initial level and the current level as well as the time of a creation of said difference: to instruct, by means of a controller (203), a height actuator (207) of the lid (102) to extend said lid (102) vertically, in order to extend the height of said vessel (101); and to instruct, by means of a controller (203), an aperture actuator (206) to create an aperture in a top of the lid (102) in order to facilitate exchange of heat.