3D Induction Rethermalizing Station for Precise Food Pan Heating
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Solution Overview
Problem
Conventional food warming and rethermalizing technologies face challenges in maintaining consistent food item temperatures, often leading to overheating, scorching, and inefficiencies due to the inability to precisely control temperature across the food item, especially in steam bath or hot air warming stations.
Innovation Solution
A rethermalizing station equipped with a three-dimensional induction coil system and temperature sensors that surround and heat food pans, allowing for precise control of temperature through varying power output to maintain targeted warming or cooking temperatures, preventing overheating and ensuring consistent food item temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional steam bath or hot air warming stations are used to heat food items, then food items can be warmed, but temperature control is imprecise leading to overheating and scorching
Solution Approach 1:
The induction heating system is divided into multiple independent coils positioned at different locations (side coils, bottom coils, top coils) that can be controlled separately. Each coil targets specific zones of the food pan, allowing differential heating control to prevent overheating in any single area while maintaining consistent overall temperature.
Solution Approach 2:
The system dynamically adjusts the power output of each induction coil based on real-time temperature feedback from multiple sensors. The control system varies heating intensity and distribution adaptively, transitioning between different heating zones and power levels to maintain precise temperature control and prevent scorching.
2Productivity
If higher power is used to heat food items faster, then heating speed increases, but energy waste and overheating increase
Solution Approach 1:
Multiple temperature sensors positioned throughout the food pan and well provide continuous feedback to the control system. This real-time temperature data enables the system to adjust induction coil power dynamically, maintaining optimal heating rate while preventing energy waste from overheating or prolonged heating after target temperature is reached.
Solution Approach 2:
The control system employs periodic heating cycles with variable duty cycles, alternating between high-power heating phases and lower-power maintenance phases. This periodic action allows rapid initial heating followed by energy-efficient temperature maintenance, improving overall energy efficiency while maintaining productivity.
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 effectively maintains consistent food item temperatures, reducing waste and energy consumption by preventing overheating and ensuring precise temperature control, thus enhancing food quality and operational efficiency compared to conventional methods.
Implementation Method 1
a first induction coil surrounding the side wall of the well, the first induction coil configured to warm the food item via inductive heating of the food pan
Implementation Method 2
a three-dimensional side induction coil surrounding the side wall of the well, the side induction coil configured to warm the food item via inductive heating of the food pan
Data Source
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AI summary
A rethermalizing station includes a well defined by a side wall, a food pan configured to be inserted into the well and to hold a food item, a first induction coil surrounding the side wall of the well, the first induction coil configured to warm the food item via inductive heating of the food pan, a first temperature sensor configured to detect a temperature of the food pan, and a control unit coupled to the first induction coil and the first temperature sensor, the control unit configured to control the first induction coil in response to the temperature of the food pan detected by the first temperature sensor such that temperature of the food pan is maintained at a targeted temperature.