Pressure Cooker Humidity Control for Faster Pressure Release
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Solution Overview
Problem
Traditional pressure cookers require a long time to build and release pressure, lack precise control over the cooking process, and are limited by a fixed humid environment, making it difficult to monitor or adjust cooking conditions and extending cooking time.
Innovation Solution
A pressure cooking device with a control unit that manages liquid water content and humidity in the cooking chamber, allowing for quick pressure release and adjustable cooking conditions, including the use of a heater to maintain temperature above dew point, a cooling element to adjust humidity, and a steam supply system to control steam status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water-based liquid is used to generate steam in a sealed vessel, then pressure cooking can be achieved, but it takes several minutes to boil the water and reach the desired temperature and pressure
Solution Approach 1:
The system pre-heats water in a separate chamber before the cooking process begins. This preliminary heating action allows the water to be ready for rapid steam generation, eliminating the time needed to heat cold water during the actual cooking process.
Solution Approach 2:
The cooking system is divided into separate functional chambers: a water chamber for steam generation and a cooking chamber for food preparation. This segmentation allows independent optimization of each function, with the water chamber dedicated to rapid steam production and the cooking chamber maintaining cooking conditions.
2Reliability
If pressure is released from the sealed vessel, then safety is ensured, but a large amount of new steam is generated which significantly slows down the pressure release process
Solution Approach 1:
The system extracts and removes condensed water from the cooking chamber through a drainage system. By continuously removing condensed water, the system prevents the accumulation of liquid that would otherwise generate excessive steam during pressure release, thus accelerating the pressure equalization process while maintaining safety.
Solution Approach 2:
The system employs sensors to monitor pressure, temperature, and liquid levels, providing continuous feedback to the control system. This feedback mechanism allows real-time adjustments to steam generation and drainage rates, optimizing the pressure release process to be both safe and rapid.
3Productivity
If the cooking chamber is sealed to maintain pressure, then pressure cooking efficiency is improved, but it is impossible to monitor or adjust the cooking process
Solution Approach 1:
The system introduces a transparent or translucent partition that acts as an intermediary between the sealed cooking environment and the external monitoring space. This allows visual observation of the cooking process without compromising the pressure seal, enabling users to monitor food preparation while maintaining cooking efficiency.
Solution Approach 2:
The system replaces mechanical opening/closing operations with electronic sensors and automated control mechanisms. Pressure, temperature, and liquid level sensors continuously monitor cooking conditions, allowing users to adjust parameters remotely or automatically without physically opening the sealed chamber.
4Stability of the object's composition
If a fixed humid environment is maintained in the cooking chamber, then pressure cooking conditions are stable, but flexibility in cooking methods is limited
Solution Approach 1:
The system transitions from a static, fixed-humidity environment to a dynamic, adjustable humidity system. Variable-speed steam injection and controllable drainage mechanisms allow the humidity level to be adjusted in real-time based on the specific cooking requirements, enabling diverse cooking methods while maintaining stable conditions when needed.
Solution Approach 2:
The system enables changes in key parameters such as humidity, temperature, and pressure independently and controllably. By allowing these parameters to be adjusted according to different cooking needs, the system provides versatility for various cooking methods while maintaining stability during each specific cooking process.
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 pressure release, precise control over the cooking process, and flexibility in humidity adjustment, reducing cooking time and expanding the range of cooking methods possible.
Implementation Method 1
a heating source (like an electric heater) is arranged to heat the sealed environment. Pressure is created and increased by boiling the liquid and by the trapped steam.
Implementation Method 2
Pressure is created and increased by boiling the liquid and by the trapped steam.
Implementation Method 3
a cooling element to adjust humidity
Data Source
Figure 1
Figure 2
AI summary
A pressure cooking device (10, 100) for cooking food materials (80), comprising: a sealed cooking chamber (20) arranged to accommodate food materials (80); a steam supplying unit (30, 130) arranged to supply steam to the sealed cooking chamber (20); and a steam channel (40) arranged to interconnect the steam supplying unit (30, 130) and the sealed cooking chamber (20); wherein the pressure cooking device (10, 100) further comprises a control unit (11) adapted to control the cooking process based on the liquid water content and/or the humidity in the sealed cooking chamber (20). By virtue of this invention, the liquid water content and/or the humidity in the sealed cooking chamber (20) could be adjusted conveniently.