Cookware Power Limiting for Precise Boiling Vigor Control
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Solution Overview
Problem
Temperature-based cooking power control systems are ineffective in controlling boiling vigor, as they lack precise control over the power delivered to cookware, especially in the boiling range.
Innovation Solution
A power control system that uses a heating control user interface to set a desired cookware temperature set point, deriving a maximum power limit that varies monotonically over the operating range, allowing for precise control of power delivery to maintain the desired temperature, particularly in the boiling range from 100° C. to 150° C., using a combination of temperature servo controls and a lookup table to determine the maximum delivered power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If temperature-based control is used, then temperature can be controlled, but boiling vigor control is ineffective
Solution Approach 1:
The system changes the controlled parameter from temperature alone to a combination of temperature and power delivery. By introducing power as a controllable parameter with a monotonically increasing power limit, the system enables direct control over boiling vigor while maintaining temperature control capabilities through the temperature servo control mechanism.
2Ease of operation
If maximum power limit is imposed, then boiling vigor control is improved, but temperature maintenance may be affected
Solution Approach 1:
The system employs dynamic control by implementing a time-varying maximum power limit that adjusts based on the current temperature relative to the set point. The power limit is monotonically increasing with temperature, allowing the system to deliver higher power when temperature is below the set point (to heat up faster) and constrain power when temperature approaches the set point (to prevent overshoot), thus simultaneously achieving boiling vigor control and temperature maintenance.
Solution Approach 2:
The system uses feedback from the temperature sensor to continuously adjust the maximum power limit. The temperature servo control provides feedback on the temperature deviation from the set point, and this feedback is used to dynamically modulate the power delivery within the monotonically increasing power limit, ensuring both boiling vigor control and accurate temperature maintenance.
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 provides improved control over boiling vigor by allowing for a monotonically increasing power limit, enabling finer control over the boiling process, ensuring the cookware maintains the desired temperature, and optimizing cooking results.
Implementation Method 1
a temperature sensor that determines the cookware temperature
Implementation Method 2
controlling the power delivered to the cookware to maintain the desired cookware temperature
Data Source
AI summary
A system and method for controlling the power delivered to cookware by a power control system that comprises a heating control user interface that is set by the user to a particular heating control user interface set point within an operating range. A controller derives from the heating control user interface set point a desired cookware temperature set point, and, over at least a first portion of the operating range that encompasses the boiling range, also derives from the heating control user interface set point a maximum limit of power that can be delivered to the cookware to maintain the cookware at the desired cookware temperature set point. The maximum power limit varies monotonically over the first portion of the operating range.