Microwave Steam-Cooking Package With Electrolytic Liquid Barrier
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Solution Overview
Problem
There is a need for an improved packaging or apparatus for cooking pre-packaged food products in a microwave oven that can address concerns over microbial integrity and cooking quality, particularly for raw food products, while ensuring convenience and safety.
Innovation Solution
A microwave cooking apparatus with a steam generating reservoir containing an electrolytic liquid that absorbs microwave energy to produce steam quickly, allowing for true steam cooking of food products while minimizing direct microwave penetration, using disposable packaging materials like plastics or cardboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional ready meal packaging is used for microwave cooking, then convenience is improved, but microbial integrity and cooking quality deteriorate
Solution Approach 1:
The packaging is divided into separate compartments: a first chamber for food product and a reservoir for electrolytic liquid. This segmentation allows the electrolytic liquid to generate steam preferentially (due to higher conductivity) which then cooks the food, resolving the contradiction by enabling convenient microwave use while maintaining microbial integrity through controlled steam cooking.
Solution Approach 2:
Steam generated from the electrolytic liquid acts as an intermediary between microwave energy and the food product. The electrolytic liquid absorbs microwave energy and converts it to thermal energy, producing steam that then cooks the food. This intermediary process ensures microbial safety while maintaining the convenience of microwave cooking.
2Productivity
If direct microwave heating is used, then cooking speed is improved, but cooking quality and microbial safety deteriorate
Solution Approach 1:
The invention changes the electrical conductivity parameter by introducing electrolytic liquid (with higher conductivity than food products) into the packaging. This parameter change causes the electrolytic liquid to absorb microwave energy preferentially and generate steam rapidly, enabling fast cooking (maintaining productivity) while the steam provides gentle, uniform heating that ensures microbial safety and cooking quality.
3Reliability
If electrolytic liquid is added to generate steam rapidly, then steam cooking quality is improved, but device complexity increases
Solution Approach 1:
The packaging with electrolytic liquid is designed as a disposable single-use unit. The electrolytic liquid is pre-filled in the reservoir at a concentration optimized for rapid steam generation (exceeding food product conductivity by significant margin). This disposable approach achieves high steam cooking quality without requiring complex reusable devices, control systems, or cleaning mechanisms, thus resolving the contradiction between cooking quality and device complexity.
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 rapid and controlled steam cooking of raw food products, ensuring microbial safety and maintaining food quality by prioritizing steam cooking over direct microwave heating, while allowing for gentle microwave cooking of accompanying sauces, and is suitable for modem recycling techniques.
Implementation Method 1
a volume of electrolytic liquid is provided in the reservoir for generating steam under the influence of microwave energy. The liquid is formulated to absorb microwave energy preferentially and to rapidly generate steam under activation of microwave energy
Implementation Method 2
generating steam under the influence of microwave energy
Implementation Method 3
the reservoir is arranged in communication with the first chamber for the passage of steam from the reservoir in to the first chamber
Implementation Method 4
enable the surface of a solid food product, such as a piece of raw chicken or fish, to be subjected to steam from the separate reservoir
Implementation Method 5
it is important to ensure that the electrical conductivity of the liquid is higher than that of the food product in the first chamber, so as to focus the microwave energy preferentially towards the liquid and not the food product
Data Source
AI summary
A disposable microwave packaging 10 includes a first chamber 12 for solid food product 14 and a second chamber 34 for a liquid accompaniment. A reservoir 26 of steam generating liquid is provided around the second chamber 34. The reservoir 26 and/or its liquid content is configured for rapidly generating steam to steam cook the solid food product 14, whilst also providing a barrier to the microwave penetration of the liquid accompaniment. The electrolytic property of the liquid and the dimensions of the barrier can be varied to control the ration of steam cooking to direct microwave cooking.