Pressure Cooker Sequential Cooking With Controlled Decompression
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Solution Overview
Problem
Pressure cookers often result in overcooking of food, especially bulky items like meat and potatoes, due to uneven heat distribution, leading to loss of nutritional and organoleptic qualities and increased energy consumption.
Innovation Solution
A cooking appliance with a cooking management device that emits signals to control the heating source and indicate the end of cooking, featuring a pressure selection member and a decompression mechanism to optimize cooking cycles, reducing the risk of overcooking and energy waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressure cooking is used to achieve rapid cooking, then cooking speed is improved, but overcooking of outer layers occurs leading to loss of nutritional and organoleptic qualities
Solution Approach 1:
The cooking process is segmented into multiple phases: a first phase with high pressure and temperature for rapid cooking, followed by a second phase with reduced pressure and temperature for gentle finishing. This temporal segmentation allows the outer layers to be cooked quickly while the heart cooks more slowly, preventing overcooking and preserving nutritional qualities.
Solution Approach 2:
The pressure cooking process employs periodic action by alternating between high-pressure cooking phases and low-pressure resting phases. The management device controls pressure fluctuations to create optimal cooking conditions at different times, ensuring both speed and quality preservation.
2Productivity
If high pressure and temperature are maintained throughout cooking, then cooking efficiency is improved, but energy waste increases due to overcooking
Solution Approach 1:
The management device controls pressure and temperature periodically, applying high energy input only when necessary for rapid cooking, then reducing energy input during resting phases. This periodic energy application maintains cooking efficiency while preventing energy waste from continuous high-temperature exposure.
Solution Approach 2:
The cooking process is made dynamic by continuously adjusting pressure and temperature based on the cooking stage. The management device modulates energy input dynamically, increasing power during active cooking phases and decreasing it during resting phases, optimizing energy efficiency throughout the process.
3Reliability
If cooking time is extended to ensure heart of food is cooked, then cooking completeness is improved, but outer layers become overcooked
Solution Approach 1:
The cooking timeline is segmented into distinct phases with different pressure and temperature conditions. The first phase focuses on rapid heat penetration to the heart, while the second phase uses gentler conditions to finish cooking without damaging outer layers, ensuring both completeness and quality.
Solution Approach 2:
The management device performs preliminary action by pre-cooking the outer layers during the high-pressure phase, then reducing pressure before the heart is fully cooked. This preliminary cooking of surfaces is followed by a gentler finishing phase that completes the cooking of the heart without further damaging the already-cooked outer layers.
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 appliance ensures rapid, energy-efficient cooking while preserving nutritional and organoleptic qualities by implementing a sequential cooking method with a first phase of high-pressure cooking followed by a second phase of gentle, inertial cooking without external energy, allowing for precise control and reduced waiting time.
Implementation Method 1
the heat input is from the outside of the food
Implementation Method 2
steam cooking under pressure
Implementation Method 3
reach temperatures above 100°C
Implementation Method 4
cooking under steam pressure
Implementation Method 5
a second phase of gentle, inertial cooking without external energy
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The apparatus (1) has a cooking management device (7) for managing cooking to emit a signal and another signal posterior to the former signal. The former signal controls disconnection of a heating source i.e. cooking plate, or invites the user to disconnect the heating source. The latter signal indicates end of cooking to a user. A decompression unit is utilized for decompressing a cooking enclosure. The cooking management device emits a third signal to control the activation of the decompression unit or invites the user to activate the decompression unit. An independent claim is also included for a method for cooking food by subjecting the food to a heating source.