Enclosure for gas detector
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Solution Overview
Problem
Existing gas detectors in refrigerated cargo containers experience delayed response times due to environmental packaging trapping gas or uncontaminated air, which can lead to unsafe delays in detecting refrigerant leaks, posing risks to cargo and personnel.
Innovation Solution
A gas detector enclosure design that isolates the gas detector element from electrical components, eliminating open spaces that can trap air or flammable gases, allowing faster gas introduction and reducing response times by configuring a printed circuit board with a solid, unitary body to impede fluid flow and a spacer portion to expose the gas detector element to the exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the gas detector element is exposed to the exterior environment through an aperture in the enclosure, then the response time for detecting gas leaks is improved, but the electrical components are exposed to harmful factors such as flammable gases and moisture
Solution Approach 1:
The enclosure is divided into two distinct chambers: a sensor chamber that is exposed to the exterior environment through an aperture for rapid gas detection, and an electronics chamber that is sealed and isolated from environmental contaminants. This segmentation allows the sensor to respond quickly to gas leaks while protecting the electrical components from harmful exposure
Solution Approach 2:
The gas detector element is extracted and placed in a separate sensor chamber that is directly exposed to the exterior through an aperture, while the electrical components are removed from environmental exposure by placing them in a sealed electronics chamber. This extraction allows the sensing function to operate in direct contact with the environment while the electronics are protected
2Reliability
If the enclosure is sealed to protect electrical components, then reliability is improved, but gas detection response time deteriorates due to trapped air preventing gas introduction to the sensing elements
Solution Approach 1:
The enclosure is segmented into a sensor chamber with an aperture for rapid gas detection and a sealed electronics chamber for component protection. This segmentation resolves the contradiction by allowing the sensor to access external gases immediately while the electronics remain protected in the sealed portion
Solution Approach 2:
The sensor chamber acts as an intermediary between the external environment and the sealed electronics chamber. It allows gas molecules to reach the sensing elements quickly through the aperture while preventing contaminated air from entering the electronics chamber, thus mediating between the need for rapid detection and component protection
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
Significantly reduces response times from 20 minutes to 1 minute, enabling faster safety warnings and mitigation strategies, and allows the refrigeration system to reactivate when the environment is deemed safe.
Implementation Method 1
Such gas detectors can include non-dispersive infrared (NDIR) technology and are used to determine concentrations of particular gases in a given atmosphere
Data Source
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AI summary
A gas detector (301) is provided and includes a gas detector element (310), electronics (320) to interface with the gas detector element (310) and an enclosure (340) configured to expose the gas detector element (310) to an exterior and to form an electronics housing area (350) in which the electronics (320) are disposed whereby the electronics (320) are isolated from the exterior.