Induction-Based Heat Retentive Server with Controlled Thermal Transfer
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Solution Overview
Problem
Conventional induction-based heat retentive servers require preheating of plates, which is energy-intensive, space-consuming, and poses safety hazards due to hot surfaces.
Innovation Solution
A heat retentive server system with an induction-heatable member enclosed within a body, using thermal material for controlled heat transfer to maintain dish temperature above 140°F for one hour without preheating, featuring a metal disk with a porcelain enamel coating and insulation layers to manage heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If preheating of plates is performed in conventional systems, then food can be maintained at serving temperature, but energy consumption increases and safety hazards occur due to hot surfaces
Solution Approach 1:
The patent extracts the heating function from the plate itself and transfers it to the server base. The induction heating element is positioned in the server base rather than in the plate, so only the food-bearing surface of the plate is heated through contact with the warm server base, eliminating the need to preheat entire plates.
Solution Approach 2:
The server base acts as an intermediary between the induction heating element and the plate. The induction heater warms the server base, which then transfers heat to the plate through contact, providing a controlled and efficient heating path that avoids direct heating of the entire plate assembly.
2Temperature
If preheating of numerous plates is performed, then food can be kept warm, but space requirements increase and safety hazards increase due to multiple hot surfaces
Solution Approach 1:
The heating function is extracted from individual plates and centralized in the server base. This eliminates multiple hot surfaces across numerous plates, leaving only the server base as a single controlled heat source that operators can avoid by simply not touching it.
Solution Approach 2:
The server base automatically maintains its temperature through induction heating, eliminating the need for manual preheating of multiple plates. The system self-regulates to keep the food-bearing surface warm without requiring operators to handle hot plates.
3Productivity
If induction heating is applied directly to plates, then heating efficiency improves, but the plate material may deform if temperature exceeds heat deflection temperature
Solution Approach 1:
The server base is designed with localized thermal zones: a heated region that contacts the plate for efficient heat transfer, and unheated regions that remain at ambient temperature. This allows high heating efficiency at the contact point while maintaining structural integrity in other areas of the base.
Solution Approach 2:
The system controls the temperature parameter of the server base to remain below the heat deflection temperature of the plate material, while still achieving effective food warming. The induction heating is modulated to provide sufficient heat for food temperature maintenance without exceeding material limits.
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
Enables food to be served at 140°F or higher for one hour without preheating the dish, reducing energy consumption and safety risks while maintaining effective heat retention.
Implementation Method 1
induction heating the induction-heatable member to a temperature greater than the heat deflection temperature of the body while the induction-heatable member is enclosed within the body
Implementation Method 2
The thermal material is adapted for providing predetermined conductive heat transfer from the induction-heatable member to the body
Implementation Method 3
allowing heat transfer from the server to the dish to increase the temperature of the dish
Data Source
AI summary
A heat retentive server includes a chamber defined between an upper shell and a lower shell that are connected to one another. An induction-heatable member is positioned in the chamber, and the induction-heatable member may be heated by electromagnetic induction to a first temperature that is greater than the heat deflection temperature of the upper shell. Buffering material comprising an inhibitively conductive hydrophobic material is positioned in the chamber between the induction-heatable member and the upper shell, and the buffering material is adapted for providing predetermined conductive heat transfer from the induction-heatable member to the upper shell so that at least a portion of the upper shell is heated to a second temperature that is greater than the heat deflection temperature of the upper shell. The second temperature is less than the first temperature.