Dynamic Food Defrosting Control System
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Solution Overview
Problem
Existing methods for defrosting food items, particularly tuna, often lead to uneven defrosting due to shape variations, resulting in overheating and spoilage, which can cause bacterial growth and degrade the quality of the fish.
Innovation Solution
A system comprising a chamber with a temperature control and monitoring system that adjusts the surrounding temperature based on the monitored temperatures of the surface and core parts of the food item, using unheated fluids to cool or heat the environment, ensuring the surface temperature remains below a predetermined maximum and closely follows target temperatures as the item defrosts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heated air is blown over frozen food to defrost it, then the defrosting process is accelerated, but the thinner parts of the food overheat and spoil
Solution Approach 1:
The system dynamically adjusts the surrounding temperature based on real-time monitoring of surface and core temperatures. The control system modifies heating power continuously to maintain optimal defrosting conditions, preventing both overheating and incomplete defrosting
Solution Approach 2:
Temperature monitoring systems continuously measure surface and core temperatures, providing feedback to the control system. This feedback loop enables real-time adjustments to heating parameters, ensuring the surface temperature does not exceed safe limits while the core reaches the desired defrost temperature
2Speed
If the surrounding temperature is increased to speed up defrosting, then the defrosting process is faster, but the surface temperature exceeds the maximum safe temperature
Solution Approach 1:
The system changes the surrounding temperature parameter dynamically during the defrosting process. The control system adjusts heating power based on the difference between current and target temperatures, using lower temperatures when the surface approaches the maximum safe temperature and higher temperatures when the core needs faster heating
3Ease of operation
If the food item has uneven shape with varying thickness, then it is easier to store and handle, but it becomes difficult to defrost evenly without spoiling
Solution Approach 1:
The system applies different heating intensities to different regions of the food item. The control system adjusts heating power based on local temperature measurements at the surface and core, providing localized thermal treatment that accounts for varying thickness and shape characteristics
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 method allows for careful and high-quality defrosting of food items like tuna, minimizing spoilage and maintaining the quality by actively controlling the temperature to prevent overheating and ensure even defrosting.
Implementation Method 1
a temperature control system for changing a temperature within the chamber
Implementation Method 2
decrease the surrounding temperature, using an unheated fluid having a temperature less than the surrounding temperature
Data Source
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Figure 2
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AI summary
Apparatus for defrosting a food item, including: a chamber for providing at least one food item therein for defrosting; a temperature control system for changing a temperature within the chamber; a temperature monitoring system for monitoring respective temperatures of a surface part and a core part of a food item; and a control system configured to control a surrounding temperature for the food item in dependence on said monitored temperatures. The control system is configured to control the temperature control system to: decreasing the surrounding temperature, using an unheated fluid having a temperature less than the surrounding temperature, when the surrounding temperature is greater than a target surrounding temperature for a given temperature of the surface part; increase the surrounding temperature when the surrounding temperature is less than a target surrounding temperature for a given temperature of the surface part; and control the surrounding temperature to maintain a temperature of the surface part below a predetermined maximum temperature for the food item. Embodiments also relate to a control system, computer software, and a method.