Gas Filling Device Display Unit Internal Pressure Explosion-Proof
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Solution Overview
Problem
Conventional gas filling devices for hydrogen and CNG vehicles face design constraints due to explosion-proof structures, which are bulky and limit design freedom, and there is a need for compact and safe devices to facilitate the spread of hydrogen stations.
Innovation Solution
A gas filling device with an internal pressure explosion-proof display unit, equipped with sensors and a monitoring system to detect pressure changes, a camera for remote monitoring, and a control mechanism to prevent gas leakage and ensure safety, allowing for a compact and flexible design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flameproof explosion-proof structure is adopted for the display unit, then safety is improved, but device size increases and design freedom is reduced
Solution Approach 1:
The patent changes the explosion-proof principle from flameproof to internal pressure type by filling the display unit case with inert gas (nitrogen or carbon dioxide) at a pressure higher than atmospheric pressure. This parameter change allows the display unit to maintain safety while reducing size and improving design freedom, as the internal pressure structure does not require the bulky flameproof enclosure of conventional designs
Solution Approach 2:
The patent fills the display unit case with inert gas (nitrogen or carbon dioxide) to create an inert atmosphere that prevents combustion of hydrogen gas. This inert environment approach allows electrical components to be housed in a compact case without requiring flameproof construction, thereby reducing device size while maintaining safety
2Reliability
If flameproof explosion-proof structure is adopted for the display unit, then safety is improved, but design freedom is reduced
Solution Approach 1:
The patent changes the explosion-proof principle from flameproof to internal pressure type by filling the display unit case with inert gas (nitrogen or carbon dioxide) at a pressure higher than atmospheric pressure. This parameter change allows the display unit to maintain safety while reducing size and improving design freedom, as the internal pressure structure does not require the bulky flameproof enclosure of conventional designs
Solution Approach 2:
The patent fills the display unit case with inert gas (nitrogen or carbon dioxide) to create an inert atmosphere that prevents combustion of hydrogen gas. This inert environment approach allows electrical components to be housed in a compact case without requiring flameproof construction, thereby reducing device size while maintaining safety
3Reliability
If conventional explosion-proof structures are used, then safety is ensured, but device compactness is reduced
Solution Approach 1:
The patent changes the explosion-proof principle from flameproof to internal pressure type by filling the display unit case with inert gas (nitrogen or carbon dioxide) at a pressure higher than atmospheric pressure. This parameter change allows the display unit to maintain safety while reducing size and improving design freedom, as the internal pressure structure does not require the bulky flameproof enclosure of conventional designs
Solution Approach 2:
The patent fills the display unit case with inert gas (nitrogen or carbon dioxide) to create an inert atmosphere that prevents combustion of hydrogen gas. This inert environment approach allows electrical components to be housed in a compact case without requiring flameproof construction, thereby reducing device size while maintaining safety
Data Source
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AI summary
To provide a safety and compact gas filling device with a display unit having a high degree of freedom in design. A gas filling device 2 characterized by comprising: a filling unit 10a having a filling mechanism for transporting a gas from a gas supply source while measuring flow rate of the gas, a hose unit 32 having a filling hose 34 connected to a gas outlet pipe 42 of the gas filling mechanism and a filling nozzle attached to a tip of the filling hose; and a display unit 10b for displaying filling data measured by the filling mechanism, wherein the display unit has an internal pressure explosion-proof structure. A monitoring device 24 for monitoring an internal pressure of the display unit is mounted, and the monitoring device interrupts a power source of the gas filling device when the internal pressure of the display unit changes.