Pressure-cooking device
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Solution Overview
Problem
Existing pressure-cooking devices are inefficient for cooking on the go, require electricity, create hot spots, and fail to retain nutrients, while being environmentally unfriendly and difficult to use.
Innovation Solution
A self-contained, unpowered pressure-cooking device with a dual-pot structure and a removable nonmetallic thermal body for heating, featuring a pressure relief mechanism and a vacuum seal to maintain heat without electricity, preventing hot spots and allowing for extended cooking periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electricity is used to heat and cook meals, then cooking efficiency is improved, but the device cannot function away from electrical outlets and cannot keep meals warm when power is unavailable
Solution Approach 1:
The patent removes the electrical heating element from the system entirely, extracting the dependency on external power sources. Instead, it uses a separate hot rock or thermal mass that is heated externally (on a stove or campfire) and then placed into the cooker to provide all necessary heating functionality, enabling operation anywhere without electricity.
Solution Approach 2:
The patent introduces a thermal mass (hot rock or heated stone) as an intermediary between the heat source and the food. This intermediary stores thermal energy and transfers it gradually to the contents of the cooker, enabling sustained cooking and warming without direct connection to a power source.
2Speed
If conventional heating elements are used, then cooking speed is improved, but hot spots are created and nutrients are lost
Solution Approach 1:
The patent creates different thermal zones within the cooker - the bottom area contacts the hot rock for primary heating, while upper areas receive indirect heat through convection and radiation. This graduated heat distribution prevents localized overheating and hot spots while maintaining adequate cooking speed throughout the contents.
3Device complexity
If single-walled cooking vessels are used, then device simplicity is improved, but heat retention is insufficient for extended cooking periods
Solution Approach 1:
The patent employs a nested construction with an inner cooking pot placed within an outer insulated housing. The inner pot directly contacts the hot rock for efficient heat transfer, while the outer housing provides thermal insulation to retain heat during extended cooking periods or when power is unavailable.
Solution Approach 2:
The patent combines materials with different thermal properties - the inner pot uses conductive material for efficient heat transfer from the hot rock, while the outer housing uses insulating materials to minimize heat loss to the environment, creating a composite structure that optimizes both heating efficiency and heat retention.
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 cooking without electricity, maintains heat for hours, reduces hot spots, and retains nutrients, making it efficient, environmentally friendly, and easy to use.
Implementation Method 1
a removable nonmetallic thermal body configured to be positioned in the gap and receive thermal energy from an external source, the thermal body to release the thermal energy to the inner pot over time
Implementation Method 2
The base pot may have a plurality of shells, the shells may be hermetically sealed together and may forming a cavity therebetween
Implementation Method 3
a pressure relief mechanism which may be positioned to be in functional communication with an interior of the inner pot
Data Source
AI summary
A pressure-cooking device including: a base pot having a plurality of shells, the shells hermetically sealed together and forming a cavity therebetween and forming a receptacle thereinside; an inner pot shaped and sized to rest within the receptacle of the innermost shell and is selectably removeable therefrom, wherein the inner pot leaves a gap between the bottom of the inner pot and the bottom of the innermost shell when resting within the innermost shell; a solid cylindrical nonmetallic thermal body shaped to fit within the gap, the thermal body selectably removeable from the gap; a pressure relief mechanism; and a cover having a hollow interior, as well as a gasket shaped and positioned to hermetically seal an inside portion of the pressure-cooking device when closed, wherein the unpowered pressure-cooking device does not include any electrically powered heating elements.