Deep Dish Microwave Heating Construct With Movable Susceptor
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Solution Overview
Problem
Microwave ovens inadequately cook food items, particularly those with thicker or taller shapes, failing to achieve a balanced heating and browning/crisping effect on the surface and bottom.
Innovation Solution
The use of microwave energy interactive elements, such as susceptors, integrated into constructs like trays or rings, which absorb microwave energy and convert it to thermal energy for enhanced browning and crisping, along with movable portions and venting apertures to improve heat distribution and moisture removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microwave energy is used to heat food items, then heating speed and convenience are improved, but browning and crisping of the surface are insufficient
Solution Approach 1:
A susceptor layer is introduced as an intermediary between the microwave energy and the food item. This susceptor absorbs microwave energy and converts it to thermal energy, which is then transferred to the food item's surface, enabling browning and crisping while maintaining the convenience of microwave heating.
Solution Approach 2:
The patent changes the physical parameters of the heating system by introducing a susceptor with specific optical density (0.15 to 0.35) and thickness (60 to 100 angstroms). These parameter changes enable the susceptor to optimally absorb microwave energy and transfer thermal energy to achieve surface browning while maintaining overall heating efficiency.
2Productivity
If microwave energy is used to heat thicker food items, then heating throughput is improved, but heating uniformity deteriorates
Solution Approach 1:
The susceptor is applied selectively to specific regions of the food item packaging, particularly the bottom and side walls. This local application ensures that thermal energy is concentrated where needed for browning and crisping, while the interior of thicker food items still receives adequate microwave penetration for uniform heating throughout.
Solution Approach 2:
The patent extends the susceptor application from a two-dimensional surface coating to a three-dimensional construct that lines the bottom and sides of the packaging. This dimensional extension ensures comprehensive thermal energy transfer to the food item's surface areas while maintaining microwave penetration for interior heating.
3Temperature
If a susceptor is added to the construct, then browning and crisping are improved, but device complexity increases
Solution Approach 1:
The susceptor layer serves multiple functions simultaneously: it absorbs microwave energy, converts it to thermal energy, transfers heat to the food item for browning and crisping, and maintains structural integrity of the packaging. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The packaging construct is formed as a composite material system combining the susceptor layer with the packaging material. This composite structure integrates the browning function directly into the packaging itself, eliminating the need for separate heating devices or complex multi-component assemblies.
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 solution effectively browns and crisps the periphery and bottom surfaces of food items, like deep dish pizzas, by concentrating microwave energy and managing moisture, resulting in more uniform cooking.
Implementation Method 1
a susceptor, which generally comprises a thin layer of microwave energy interactive material (generally less than about 100 angstroms in thickness, for example, from about 60 to about 100 angstroms in thickness, and having an optical density of from about 0.15 to about 0.35, for example, about 0.21 to about 0.28) that tends to absorb at least a portion of impinging microwave energy and convert it to thermal energy (i.e., heat)
Data Source
AI summary
A microwave heating construct includes a base with a plurality of movable portions, where the movable portions are operative for pivoting into a substantially upright condition, and the base and plurality of movable portions includes microwave energy interactive material that is operative for converting microwave energy into heat, so that pivoting the movable portions moves the microwave energy interactive material of the movable portions into an upright condition.