Optically Transmissive Cookware for Direct Narrowband Food Heating
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Solution Overview
Problem
Traditional cooking methods using opaque cookware and packaging materials block direct radiant energy from heating food efficiently, leading to inefficient heat transfer and uneven cooking due to secondary thermal transfer processes.
Innovation Solution
Designing cookware and cook-packs made from optically transmissive materials at specific wavelength bands, such as polyethylene terephthalate (PET) and polypropylene, that allow direct irradiation of food, along with innovative designs like mesh materials and antireflective coatings to enhance energy transmission and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional opaque cookware and packaging materials are used, then the structural integrity and containment of food is maintained, but direct radiant energy is blocked from heating food efficiently
Solution Approach 1:
The patent applies optically transmissive materials that are transparent or translucent to specific wavelength bands of radiant energy (such as infrared or microwave frequencies). This allows the cookware and packaging to change their optical properties from opaque to transmissive at targeted wavelengths, enabling direct radiant energy penetration while maintaining structural integrity and food containment.
Solution Approach 2:
The invention uses composite material structures combining different layers or components with complementary properties - including optically transmissive materials for radiant energy penetration, structural layers for mechanical strength, and potentially selective absorption layers. This composite approach allows simultaneous achievement of energy efficiency, structural integrity, and controlled energy interaction.
2Use of energy by moving object
If opaque materials are used for cookware, then mechanical strength and durability are maintained, but heat transfer to food becomes inefficient requiring secondary thermal transfer
Solution Approach 1:
The patent extracts the heat transfer function from the traditional multi-step process (radiant energy to cookware to food) by using optically transmissive materials that allow radiant energy to directly reach the food. This eliminates the intermediate step of heating the cookware first, then transferring heat to the food, thereby simplifying the heat transfer process and improving efficiency.
3Productivity
If secondary thermal transfer is used through cookware, then food is heated, but cooking time increases and temperature uniformity decreases
Solution Approach 1:
The patent introduces optically transmissive packaging and cookware as a mediator that facilitates direct radiant energy interaction with food while maintaining containment. This mediator allows radiant energy to pass through to the food directly, enabling volumetric heating throughout the food mass rather than surface-only heating, which improves both cooking speed and temperature uniformity.
4Ease of manufacture
If traditional cookware materials are used, then manufacturing simplicity is maintained, but direct irradiation capability is lost
Solution Approach 1:
The patent modifies the optical parameters of cookware and packaging materials by selecting materials with specific transmissive properties at targeted wavelength bands. This parameter change allows traditional manufacturing methods to be used while achieving the new functionality of direct radiant energy transmission, thus maintaining ease of manufacture while gaining irradiation compatibility.
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
Facilitates direct and efficient heating of food with reduced energy wastage and improved cooking uniformity by allowing narrowband irradiation to penetrate and absorb directly, reducing cooking time and maintaining food quality.
Implementation Method 1
vessels...which are transparent or translucent and thus allow the direct irradiation of comestible targets
Implementation Method 2
direct heating by the irradiation is not possible...The result is it heats up the pan, cooking vessel, or package instead of directly heating the food
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
A methodology and product or system configurations are provided which allow food to be directly irradiated for cooking applications which involve the impingement of direct radiant energy on food or comestible items. Cooking vessels or cook-packs are used that are optically transmissive in visible or infrared narrow wavelength bands emitted in suitable narrowband cooking or heating systems.