Gas Sensor Adapter Flow Path for High-Velocity Vent Sampling
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Solution Overview
Problem
There is a need for improved gas management systems in electrochemical energy storage systems, particularly in metal-air battery systems, to ensure safety and efficiency in handling oxyhydrogen mixtures, which are prone to explosions and require effective dilution and monitoring to prevent hazardous conditions.
Innovation Solution
A ventilation system with a shared vent and fan configuration, combined with a gas sensor adapter that includes specific aperture ratios and threading for secure engagement, allows for efficient gas sampling and monitoring, reducing the risk of explosions by diluting oxyhydrogen mixtures and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gas sensor is directly exposed to high flow ventilation system, then gas concentration can be detected, but the sensor will be damaged by high velocity gas flow
Solution Approach 1:
The patent introduces an intermediary adapter assembly with flow path and apertures positioned between the high flow ventilation system and the gas sensor. This adapter reduces the gas flow velocity from the high velocity main flow to a lower velocity suitable for sensor exposure, while still allowing the sensor to detect gas concentrations accurately. The adapter acts as a mediator that protects the sensor from direct exposure to damaging high velocity flow.
2Quantity of substance
If gas flow rate to sensor is increased to match high flow ventilation system, then representative sampling is achieved, but sensor accuracy deteriorates due to excessive flow velocity
Solution Approach 1:
The patent segments the gas flow into two distinct paths: a main high flow path that maintains representative sampling of the ventilation system, and a sampled flow path through apertures that delivers reduced velocity gas to the sensor. This segmentation allows the system to achieve both high flow rate for representativeness and low velocity for sensor accuracy simultaneously.
3Reliability
If adapter design includes flow reduction features, then sensor protection is achieved, but device complexity increases
Solution Approach 1:
The patent uses pneumatic principles to achieve flow velocity reduction through carefully designed apertures and flow paths in the adapter. By leveraging fluid dynamics and pressure differential, the adapter naturally reduces gas velocity without requiring mechanical moving parts or complex control systems, thereby maintaining simplicity while protecting the sensor.
Data Source
AI summary
The present disclosure is generally directed to ventilation systems and an assembly for sensing gas concentration in a ventilation system. The assembly includes a body defining an opening and a passage. The assembly includes a first tube supported on the body, the first tube defining a first channel and one or more first apertures, the one or more first apertures in fluid communication with the passage via the first channel. The assembly includes a second tube supported on the body, the second tube defining a second channel and one or more second apertures, the one or more second apertures in fluid communication with the passage via the second channel and, collectively, the one or more first apertures, the first channel, the passage, the second channel, and the one or more second apertures defining at least a portion of a flow path.