Microwave Container With Diffusing Element For Even Heating

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Solution Overview

Problem

Microwave ovens often result in uneven heating of large food items, where some portions become overheated and charred while others remain underheated, due to premature heating.

Innovation Solution

The use of microwave energy interactive structures, including diffusing elements with transparent areas and reflective elements, which diffuse and scatter microwave energy to control the heating rate and prevent overheating, ensuring more even heating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If microwave energy is applied to heat a large food item, then the heating speed increases, but the heating uniformity deteriorates causing some portions to become overheated and charred while others remain underheated

Engineering Contradiction:
Improveheating speedVSAvoidheating uniformity
Core Design Contradiction:
SpeedVSStability of the object's composition

Solution Approach 1:

The microwave-transparent area is divided into multiple microwave-reflective elements (such as a grid pattern of reflective lines or shapes) that segment the microwave energy path. This segmentation causes the microwave energy to reflect multiple times and reach different portions of the food item at more uniform rates, preventing localized overheating while maintaining overall heating speed

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The container structure incorporates localized microwave-reflective elements in specific areas to control the distribution of microwave energy. By strategically placing reflective elements in the microwave-transparent area, the invention creates localized reflection zones that redirect energy to underheated portions while protecting already-heated areas, thereby achieving uniform heating across the entire food item

Inventive Principle:
Principle #3Local quality

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

This solution achieves uniform heating of food items, minimizing scorching and drying, and improving the overall appearance and quality of the food.

Implementation Method 1

Each diffusing element includes a microwave energy transparent area that circumscribes one or more microwave energy reflective elements. The reflective elements at least partially diffuse, scatter, and/or obstruct (collectively 'diffuse') the microwave energy passing through the microwave energy transparent area.

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 2

In one aspect, the structures, blanks, and constructs of the invention include at least one diffusing element circumscribed by a microwave energy shielding element.

Methodology Applied
Scientific EffectShielding: Faraday Cage

Data Source

PatentUS9764887B2Even heating microwavable container
Publication Date: 2017.09.19 GRAPHIC PACKAGING INTERNATIONAL LLC
  • US9764887B2 patent drawing
  • US9764887B2 patent drawing
  • US9764887B2 patent drawing

AI summary

A construct for heating a food item in a microwave oven includes a base, a wall extending upwardly from the base, a microwave energy shielding element overlying at least a portion of the wall, and a microwave energy diffusing element circumscribed by the microwave energy shielding element. The microwave energy diffusing element includes a plurality of microwave energy reflective elements within a microwave energy transparent area.