Aerosol Pressure Gauge with Valve-Driven Pointer
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Solution Overview
Problem
Hand-held aerosol fire suppressors face challenges in determining the remaining pressure within the container, which affects their operational effectiveness, as existing solutions do not provide a reliable visual indication of the internal pressure, leading to potential misuse or storage of depleted devices.
Innovation Solution
A pressure gauge system is integrated into the aerosol container assembly, which includes a mechanical amplifier and a pointer-scale mechanism to visually indicate the internal pressure by detecting the movement of the valve assembly relative to the container body, providing a clear 'CHARGED' or 'DISPOSE' indication based on the pressure threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure gauge system is integrated into the aerosol container assembly, then the visual indication of internal pressure is improved, but the device complexity increases
Solution Approach 1:
The pressure gauge mechanism is nested within the existing valve assembly structure. The pointer is positioned to rotate within the cap assembly, and the scale is integrated into the visible face of the cap. This nesting approach allows the pressure indication function to be added without requiring a separate external gauge housing, thereby improving measurement precision while minimizing the increase in overall device complexity.
Solution Approach 2:
The valve assembly is designed to serve multiple functions: it acts as both the dispensing mechanism for the aerosol product and the pressure sensing element for the gauge. The movement of the valve assembly in response to internal pressure changes directly drives the pointer indication, eliminating the need for a separate pressure sensing mechanism and reducing overall device complexity while providing reliable pressure indication.
2Illumination intensity
If a pointer-scale mechanism is used to indicate pressure, then the visual clarity is improved, but the device complexity increases
Solution Approach 1:
The scale incorporates color-coded zones to enhance visual clarity. The scale features a green zone indicating adequate pressure levels and a red zone indicating depleted pressure levels. This color differentiation allows users to quickly assess the pressure status at a glance without requiring complex instrumentation, thereby improving visual clarity while maintaining simple device architecture.
Solution Approach 2:
The pressure indication is transmitted mechanically through a pointer that rotates to indicate pressure levels on a fixed scale. This simple pointer-scale copying mechanism provides clear visual feedback without requiring electronic displays, sensors, or power sources, thus improving visual clarity while avoiding increases in device complexity.
3Reliability
If the valve assembly movement is used to detect pressure changes, then the measurement reliability is improved, but the device complexity increases
Solution Approach 1:
The valve assembly itself serves as the pressure sensing element. As internal pressure changes, the valve assembly moves accordingly, and this movement directly drives the pointer indication through a simple mechanical linkage. This self-service approach eliminates the need for separate pressure sensors, transducers, or electronic measurement systems, thereby improving measurement reliability through direct physical correlation while minimizing device complexity.
Solution Approach 2:
The system provides immediate visual feedback through the pointer-scale mechanism that directly reflects the physical state of the valve assembly. As pressure changes cause the valve assembly to move, the pointer responds in real-time to indicate the current pressure status. This direct feedback loop ensures reliable pressure detection without requiring complex control systems or intermediate measurement stages.
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 pressure gauge effectively indicates whether the aerosol container has a suitable charge, ensuring the fire suppressor is operational, thereby preventing misuse and ensuring the device is properly disposed of when depleted.
Implementation Method 1
detect movement of the valve assembly relative to a container body of the aerosol container resulting from changes of pressure inside the container body
Implementation Method 2
The pointer is operatively coupled to the valve assembly and moves relative to the scale in response to movement of at least a portion of the valve assembly due to internal pressure in the container body
Implementation Method 3
The flowable product and propellant then mix in the mixing chamber such that the flowable product foams before moving into the valve assembly
Data Source
AI summary
A pressure gauge for an aerosol container includes a scale attached to the container body and a pointer associated with and movable relative to the scale. The pointer is operatively coupled to a valve assembly of the aerosol container. The pointer moves relative to the scale in response to movement of at least a portion of the valve assembly due to internal pressure in the container body to provide a reading.