Accelerated Cooking Using Surface Temperature Feedback Control
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Solution Overview
Problem
Conventional cooking methods, such as sous vide, rely on measuring the temperature of the surrounding fluid rather than the food's surface temperature, leading to inefficient and slow cooking due to heat distribution imbalances and evaporative cooling effects.
Innovation Solution
A system utilizing a multipoint wireless thermometer to directly measure the food's surface temperature, with a feedback control algorithm that adjusts the surrounding fluid's temperature to rapidly achieve and maintain the desired surface temperature, reducing cooking time by controlling the temperature distribution from the surface to the core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surrounding fluid temperature is controlled to match the desired final core temperature, then overcooking is avoided, but cooking time becomes excessively long due to slow heat propagation from surface to core
Solution Approach 1:
The system implements feedback control by continuously measuring the food surface temperature and adjusting the surrounding fluid temperature accordingly. The controller increases fluid temperature when surface temperature is below target and decreases it when surface temperature exceeds target, enabling faster cooking while preventing overcooking through real-time adjustments based on actual surface conditions rather than relying solely on pre-set fluid temperatures
Solution Approach 2:
The system transitions from static temperature control (maintaining constant fluid temperature) to dynamic temperature control where the surrounding fluid temperature is continuously adjusted based on real-time surface temperature measurements. This allows the cooking process to adapt to changing thermal conditions, enabling faster heating rates while maintaining food quality through active regulation
2Productivity
If the surrounding fluid temperature is set higher to accelerate cooking, then cooking speed increases, but the surface temperature may exceed the desired final core temperature causing overcooking
Solution Approach 1:
The feedback control mechanism continuously monitors surface temperature and adjusts fluid temperature in real-time. When surface temperature approaches or exceeds the target temperature, the controller automatically reduces fluid temperature, preventing overcooking even during accelerated cooking phases. This enables the system to safely operate at higher temperatures for faster cooking while maintaining quality control through active regulation
Solution Approach 2:
The system employs periodic temperature adjustments by cycling the heating element on and off based on surface temperature feedback. This periodic action allows the surface temperature to temporarily exceed the target temperature during controlled intervals to accelerate cooking, then rapidly reduces fluid temperature to bring surface temperature back within acceptable ranges, achieving faster cooking without sustained overcooking
3Measurement precision
If conventional thermometers measure only core temperature, then the final doneness is monitored, but the actual cooking temperature at the surface cannot be determined
Solution Approach 1:
The system divides the temperature measurement function into multiple segments by placing temperature sensors at different locations within the food - specifically at the surface and at the core. This segmentation allows independent measurement of surface temperature (the actual cooking temperature) and core temperature (the final doneness indicator), providing comprehensive thermal profile data that enables both accelerated cooking control and quality verification
Solution Approach 2:
The system transitions from one-dimensional temperature monitoring (core temperature only) to multi-dimensional temperature monitoring by adding surface temperature measurement. This dimensional expansion provides a complete thermal profile of the food during cooking, enabling control based on the actual cooking temperature at the surface while still monitoring core temperature for final doneness assessment
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 can reduce cooking time by 50% or more while maintaining food quality, achieving uniform temperature distribution without the need for sealed packaging or humidity control, and allows for faster heating by prioritizing surface temperature convergence.
Implementation Method 1
heating a surrounding fluid... that then transfers heat to the food
Implementation Method 2
heat propagation from the food's surface to its core
Implementation Method 3
possible evaporative cooling effects... heat energy leaving the surface
Data Source
AI summary
The present disclosure provides a method and system for accelerated cooking using surface temperature measurements. A thermometer measures the surface temperature of food within a cooking appliance that heats a surrounding fluid, such as air, water, or oil. A feedback control algorithm uses the surface temperature and a target temperature to control the surrounding fluid's temperature. Initially, the fluid is heated above the target temperature to quickly raise the food's surface temperature. As the food warms, the fluid temperature decreases, stabilizing near the target temperature. This maintains the surface temperature near the target, accelerating the core's temperature equilibrium. The method may also allow temporary surface temperature overshoot for further time reduction. This method enables accelerated, precise cooking, accounting for evaporative cooling effects, without the need for complex user inputs or sous vide/humidity-controlled appliances.