Directional Differential Pressure Detector with Rotatable Set Point Indicator
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Solution Overview
Problem
Existing systems for monitoring directional differential pressure between spaces are inefficient in adjusting threshold values and can provide inaccurate readings when installed on non-plumb walls, requiring complex recalibration and access to both sides of the barrier.
Innovation Solution
A device with a rotatable base and adjustable conduit that allows independent adjustment of the inclination from one side of the wall, using a differential pressure set point indicator tied to gravity, enabling accurate threshold detection without recalibration and accommodating out-of-plumb installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing differential pressure monitoring systems are installed on non-plumb walls, then installation flexibility is improved, but measurement precision deteriorates due to inaccurate readings
Solution Approach 1:
The indicator assembly is made rotatable about the conduit axis, allowing dynamic adjustment of the indicator's orientation. This enables the bubble vial to be positioned at any angular orientation around the conduit, permitting accurate threshold indication regardless of the conduit's inclination angle or installation orientation on non-plumb walls.
Solution Approach 2:
The system transitions from a fixed two-dimensional indicator arrangement to a three-dimensional rotatable assembly. The bubble vial can be rotated to any angular position around the conduit axis, adding a rotational degree of freedom that allows the indicator to function accurately on walls of any orientation, including non-plumb installations.
2Adaptability or versatility
If existing systems require recalibration for different installation conditions, then adaptability to different environments is improved, but device complexity and installation time increase
Solution Approach 1:
The rotatable indicator assembly allows the system to self-adjust to any installation condition without external recalibration. The installer can simply rotate the indicator assembly to the appropriate angular orientation around the conduit, and the system automatically functions correctly for that installation geometry, eliminating complex recalibration procedures.
Solution Approach 2:
The rotatable indicator assembly serves multiple functions: it provides threshold indication accurate for any conduit inclination angle, accommodates any wall orientation (plumb or non-plumb), and eliminates the need for different indicator configurations for different installation scenarios. This universal design works for all installation conditions without modification.
3Device complexity
If the indicator is fixed relative to the conduit, then device complexity is reduced, but ease of operation deteriorates when installation conditions vary
Solution Approach 1:
The indicator assembly is made rotatable about the conduit axis, transforming from a fixed to a dynamic configuration. This single rotational degree of freedom provides the flexibility needed to accommodate any installation condition while maintaining relatively simple device construction, achieving a balance between complexity and operational ease.
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 precise and efficient monitoring of directional differential pressure with adjustable threshold settings and accurate readings on non-plumb walls, reducing installation complexity and recalibration needs.
Implementation Method 1
a movable element disposed within the first conduit and movable from a first, vertically lower region of the first conduit to a second, vertically higher region of the first conduit in response to the directional differential pressure between the first and second spaces
Implementation Method 2
a rotatable base configured to be rotatably attached to the barrier, and a first conduit coupled to the base, where when the rotatable base is rotated, an inclination of the first conduit is adjusted relative to a horizontal plane
Data Source
AI summary
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.