Microwavable Dish with Nodular Coating for Even Browning
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Solution Overview
Problem
Microwave ovens lack the 'browning effect' provided by traditional ovens, and existing microwavable dishes with coatings often result in uneven cooking with unwanted browning in some areas while leaving others uncooked.
Innovation Solution
A microwavable dish with a top that reflects microwaves and a bottom featuring a dome portion with a microwave-absorbing coating and nubs, designed to absorb microwaves and distribute heat evenly by matching resonance frequency, using nanoparticle materials like carbon nanotubes or graphene for efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a microwave-absorbing coating is applied to the bottom or back side of the microwavable dish, then the dish can heat from the outside similar to a traditional oven, but the food often has unwanted browning in some areas while leaving other parts uncooked
Solution Approach 1:
The coating is segmented into multiple discrete nodules distributed across the bottom surface of the dish. Each nodule acts as an independent microwave-absorbing element, allowing for more uniform heat distribution across the cooking surface compared to a continuous coating. This segmentation prevents localized overheating zones while maintaining overall heating effectiveness.
Solution Approach 2:
The nodular coating structure provides different local properties: the nodules themselves have high microwave absorption capability for targeted heating, while the spaces between nodules allow for heat dissipation and uniform distribution. This local variation in quality enables the dish to achieve even heating across different areas, preventing both undercooked and excessively browned regions.
2Use of energy by moving object
If a continuous microwave-absorbing coating is applied to the bottom of the dish, then the dish absorbs microwaves effectively, but the heat distribution becomes uneven causing unwanted browning in some areas
Solution Approach 1:
The continuous coating is replaced with discrete nodules that segment the microwave absorption function across multiple localized points. This segmentation maintains overall absorption efficiency while distributing the thermal energy more uniformly across the dish bottom, preventing concentration of heat in specific areas that would cause unwanted browning.
Solution Approach 2:
The coating transitions from a two-dimensional continuous layer to a three-dimensional array of nodules with varying heights and volumes. This dimensional change allows the nodules to absorb microwaves effectively while their distributed spatial arrangement and varying sizes create more uniform heat distribution patterns across the cooking surface.
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 dish achieves quick and even heating of food, reducing cooking time and power requirements while minimizing uneven cooking, ensuring consistent browning and cooking of food items.
Implementation Method 1
a bottom in opposing relationship to the top having dome portion that absorbs microwaves
Implementation Method 2
The absorption helps to heat the microwavable dish so that the food in the microwavable dish can be heated from the outside
Implementation Method 3
by matching resonance frequency, using nanoparticle materials like carbon nanotubes or graphene for efficient heating
Data Source
AI summary
A microwavable dish having a body with a microwave-absorbing coating. A bottom of the microwavable dish or the microwave-absorbing coating defines or includes a dome portion. The microwave-absorbing coating can be coupled to or formed with the bottom of the microwavable dish. The microwave-absorbing coating provides heat to the body by transforming microwaves to heat. The microwave-absorbing coating can include a plurality of nubs, where each nub has a height and a nub diameter.