Non-Metallic Microwave Pressure Cooker With Elastomeric Pressure Control
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Solution Overview
Problem
Existing microwave pressure cookers contain metallic parts that reflect microwave energy, cause safety hazards, and are prone to mechanical issues due to thermal cycling, leading to inefficient cooking and potential damage to the microwave oven.
Innovation Solution
A microwave-compatible pressure cooker made entirely of non-metallic materials like polypropylene and silicone, featuring elastomeric pressure regulators and a gasket offset device for safe and efficient pressure management, eliminating the need for metal components and enhancing cooking performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic parts are used in microwave pressure cooker, then structural strength and pressure control are improved, but microwave energy reflection and safety hazards increase
Solution Approach 1:
The patent removes all metallic parts from the microwave pressure cooker system. The pressure regulator, locking lugs, gasket, and other components are all made from non-metallic materials such as polypropylene and silicone, completely extracting the harmful metallic elements that cause microwave reflection and safety hazards while maintaining functional integrity through alternative material properties
Solution Approach 2:
The patent changes the material parameters from metallic to non-metallic compositions. By using materials with different electromagnetic properties (microwave-transparent or microwave-absorbing polymers), the system maintains mechanical strength and pressure control functions without the harmful microwave reflection characteristics of metals
2Reliability
If metallic parts are used in microwave pressure cooker, then pressure control functionality is improved, but reliability under thermal cycling deteriorates
Solution Approach 1:
The patent employs composite non-metallic materials, particularly combining polypropylene with silicone rubber components. This composite approach provides both the structural integrity needed for pressure control and the thermal flexibility required to withstand repeated heating and cooling cycles without degradation, warping, or failure
Solution Approach 2:
The patent selects materials with appropriate thermal expansion coefficients and melting points that remain stable under microwave heating conditions. The non-metallic materials are chosen to maintain their mechanical and elastic properties across the thermal cycling range, ensuring consistent pressure control functionality
3Object-affected harmful factors
If non-metallic materials are used throughout, then microwave compatibility and safety are improved, but pressure control precision may deteriorate
Solution Approach 1:
The patent applies different non-metallic material properties to different components of the pressure control system. The pressure regulator uses elastomeric material with specific durometer ratings for precise pressure sensing and regulation, while other components use rigid non-metallic materials for structural support. This localized optimization of material properties maintains pressure control precision without compromising microwave compatibility
Solution Approach 2:
The patent carefully selects non-metallic materials with specific physical parameters such as elastic modulus, durometer hardness, and thermal properties that enable precise pressure control. By adjusting these material parameters, the system achieves accurate pressure regulation comparable to metallic systems while maintaining microwave safety
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 provides a safe, efficient, and convenient pressure cooking experience within a microwave oven by ensuring all parts are compatible with microwave energy, preventing pressure buildup, and maintaining cooking efficiency without the risks associated with metallic parts.
Implementation Method 1
Microwave ovens use microwave energy to heat or cook food in a fraction of the time needed to cook with conventional ovens
Implementation Method 2
The microwaves readily pass through many materials, such as glass, most plastics, paper and china clay, with little or no effect
Implementation Method 3
a pressure regulator means comprising a pressure responsive elastomeric pressure regulator
Implementation Method 4
pressure cooking system to be used inside a microwave oven for cooking food containing steam at a pressure above the ambient pressure
Data Source
AI summary
The invention relates to a microwave pressure cooker including a container open at its top which includes a cover with a gasket adapted for ledge interlock type sealing and lug locking engagement with the container. There are two regulator opening means provided as valve opening through the cover (2) such that one of the deformable diaphragm type pressure regulator means formed are disposed on these regulator opening means which deform responsive to the pressure in the enclosure. A push rod type gasket offset device means is also provided on locking lug and opening and closing aid of the cover for releasably maintaining the container and the cover in sealing engagement. Further a filter is disposed removably on the first regulator opening means, which controls the pressure building within the enclosure.