Induction warmer station
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional food warmer stations are energy inefficient and provide constant power levels regardless of the amount of food held, leading to inefficient heat transfer and potential overheating.
Innovation Solution
An induction warmer station with a controller that adjusts the frequency of the induction coil based on the surface area of load material, using a feedback control loop to maintain a constant power-per-unit-surface-area, thereby optimizing heat delivery to food items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional food warmer stations use resistive heaters or heat lamps operating at constant power level, then the warmer station can maintain a suitable temperature for food items, but the energy efficiency deteriorates because only a small portion of heat is transferred into the food items and the station operates at constant power regardless of the amount of food held
Solution Approach 1:
The patent applies dynamics by making the power level of the warmer station adjustable and variable based on detected food parameters. The system transitions from a static constant power operation to a dynamic operation where power level is continuously adapted according to the detected food amount, type, or temperature requirements, thereby improving energy efficiency while maintaining adaptability.
Solution Approach 2:
The patent implements feedback by using detectors to sense food-related parameters (such as amount, type, or temperature) and using this information to automatically adjust the power level of the warmer station. This closed-loop feedback mechanism ensures that the station operates at optimal power levels corresponding to the actual food load, reducing energy waste while maintaining food at suitable temperatures.
2Temperature
If conventional food warmer stations operate at constant power level, then the station can provide consistent heating, but the temperature control deteriorates leading to potential overheating when small amounts of food are present
Solution Approach 1:
The system dynamically adjusts the power level based on detected food parameters, enabling precise temperature control for different food amounts. When small amounts of food are detected, the power level is automatically reduced to prevent overheating, while larger food amounts receive higher power levels for adequate heating.
Solution Approach 2:
The detectors provide feedback about food presence and characteristics, which the control system uses to automatically adjust power levels. This feedback mechanism eliminates the need for manual intervention and achieves precise temperature control adapted to the actual food load, improving both temperature precision and ease of operation.
3Ease of manufacture
If the induction coil uses a simple series connection of loops, then the manufacturing is simpler, but the heating uniformity deteriorates across different surface areas of load material
Solution Approach 1:
The patent applies local quality by configuring the induction coil loops in a specific pattern where different sections of the coil can independently influence different areas of the load material. This spatial arrangement of loops creates localized magnetic fields that can be selectively activated or adjusted to provide uniform heating across varying surface areas, achieving precise heating control without complicating the overall coil structure.
Solution Approach 2:
The induction coil is segmented into multiple loops that can be independently controlled or that naturally create distinct heating zones. This segmentation allows the system to address different surface areas of load material with appropriate heating intensity, improving heating uniformity while maintaining a relatively simple manufactured structure through modular loop design.
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 induction warmer station efficiently adjusts heat output based on the size of the food items, ensuring consistent warming while minimizing energy consumption and preventing overheating.
Implementation Method 1
an induction coil positioned in the housing adjacent the cooktop
Implementation Method 2
heating the load material at a ratio of power to the amount of load material by controlling operation of the induction coil
Implementation Method 3
heating the load material at a ratio of power to the amount of load material
Data Source
AI summary
An induction warmer station for use with food wrapped in foil includes a cooktop, an induction coil coextensive with the cooktop, and power electronics configured to respond to a changing amount of foil on the cooktop by driving an alternating current in the induction coil toward a setpoint.