Pressure Vessel Valve Unit With Adjustable Pressure Indication
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Solution Overview
Problem
Existing pressure cooker valve systems lack adjustability between the indicator range and response pressure of the pressure-relief device, making it difficult for users to monitor and control cooking levels and pressure levels accurately, leading to potential overpressure issues without clear visual or audible signals.
Innovation Solution
The valve unit integrates a common axially adjustable pressure member that braces both the indicator spring and exhaust steam spring, allowing for correlated response of the pressure-relief device with indicator signals, using color-coded annular regions on the indicator pin for visual and audible signals to indicate optimal cooking levels and overpressure, and enabling pressure-free cooking settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate indicator spring and exhaust steam spring are used with fixed positions, then the device structure is simple, but the indicator range cannot be adjusted to correlate with pressure-relief response pressure
Solution Approach 1:
The patent combines the indicator spring and exhaust steam spring into a single integrated spring assembly, where both functions share a common spring mechanism. This merging allows the indicator range to be adjusted to correlate with the pressure-relief response pressure while avoiding the complexity of separate adjustable spring systems.
Solution Approach 2:
The patent introduces an adjustable mechanism that allows the spring assembly to be dynamically reconfigured for different pressure settings. The adjustment capability enables the system to adapt to various cooking requirements by changing the indicator range and pressure-relief response pressure correlation, transforming a static system into a dynamic one.
2Loss of information
If no correlation exists between indicator pin position and pressure-relief response, then the pressure-relief device can respond at appropriate pressure levels, but the user cannot accurately monitor cooking levels and pressure levels
Solution Approach 1:
The patent establishes a direct correlation between the indicator pin position and the pressure-relief response pressure through the integrated spring assembly. As pressure increases, both the indicator pin and the pressure-relief device respond in a coordinated manner, providing visual feedback that accurately reflects the actual pressure level and cooking status, enabling users to monitor and control the cooking process effectively.
3Loss of information
If the indicator pin provides continuous pressure information, then users can monitor cooking levels, but without correlated pressure-relief response, overpressure cannot be prevented
Solution Approach 1:
The patent merges the indicator function and pressure-relief function into a single correlated system. The integrated spring assembly ensures that the indicator pin position always reflects the actual pressure level at which the pressure-relief device will activate, providing both monitoring capability and overpressure protection through the unified mechanism.
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
This solution allows users to monitor cooking levels consistently through the indicator pin, providing clear signals to adjust heat supply and preventing overpressure, ensuring safe and efficient cooking by correlating indicator signals with pressure-relief responses.
Implementation Method 1
both the indicator spring (7) and the exhaust steam spring (6) are braced in the same direction against a common, axially adjustable pressure member (8)
Implementation Method 2
the response of the pressure-relief device correlates with the indicator signals of the indicator pin
Data Source
AI summary
The invention relates to a valve unit for a pressure vessel, the latter consisting of a receptacle and a lid which can be placed on said receptacle in such a way as to make it pressure-tight and said valve unit including: a safety function, pressure-relief function and pressure indicator function; adjustable indicator levels and pressure levels; an indicator pin (4) or indicator piston (10) which is supported against an indicator spring (7), can move in axial direction and bears on its portion becoming visible upon pressurization, due to its emergence from a valve housing (12), indicator rings, for example, for indicating the pressure inside the vessel; and comprising a valve body (5) which is movable in axial direction against the action of an exhaust steam spring (6) and, in the closed position, rests against a seal seat (19), lifting off from this, when a given pressure inside the vessel is exceeded, to uncover a pressure-relief aperture (20), in which case both the indicator spring (7) and the exhaust steam spring (6) are braced in the same direction against a common, axially adjustable pressure member (8).