Hydrogen Filling Nozzle Suction Device Vacuum Chamber Segmentation
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Solution Overview
Problem
The existing suction devices for hydrogen filling nozzles face design constraints due to the need for hydrogen explosion protection and the requirement for sufficient suction power, leading to size expansion and increased costs, while also struggling with water removal efficiency and convenience.
Innovation Solution
A suction device configuration that includes a suction nozzle, a vacuum chamber, and a vacuum pump, where the vacuum chamber is used to provide sufficient suction power even with a relatively low-powered vacuum pump, allowing for flexible design and placement, including options for hydrogen explosion protection, and featuring mechanisms for adjustable suction nozzle angles and multiple vacuum chambers for continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vacuum pump is located near the suction nozzle to provide sufficient suction power, then water removal efficiency is improved, but the design flexibility is restricted and hydrogen explosion protection requirements increase complexity
Solution Approach 1:
The suction device is divided into two independent functional modules: a suction nozzle assembly for water removal and a vacuum pump assembly for creating vacuum. This segmentation allows each module to be optimized independently and placed in different locations, resolving the contradiction between proximity for efficiency and separation for design flexibility and safety.
Solution Approach 2:
A vacuum chamber is introduced as an intermediary component between the suction nozzle and the vacuum pump. The vacuum chamber receives and accumulates water from the suction nozzle, then transfers it to the vacuum pump for removal. This intermediary allows the suction nozzle to be positioned for optimal water removal while the vacuum pump can be located for optimal maintenance and safety.
2Adaptability or versatility
If the vacuum pump is located distant from the suction nozzle to improve design flexibility, then arrangement freedom is improved, but piping length increases and pressure loss increases requiring higher suction power
Solution Approach 1:
The vacuum chamber is evacuated to create a vacuum state before the suction operation begins. This preliminary action establishes a pressure differential that drives water movement through the piping, compensating for the pressure loss over distance and allowing the vacuum pump to be located farther from the suction nozzle without sacrificing performance.
3Productivity
If the vacuum pump has high suction power to compensate for long piping, then sufficient suction is ensured, but the vacuum pump size expands and cost increases
Solution Approach 1:
Instead of requiring the vacuum pump to continuously provide high suction power through long piping, the system uses the vacuum chamber to accumulate water and then rapidly transfer it to the pump. The pump operates at high power only during the brief water removal phase, allowing a smaller pump size while maintaining effective suction capability.
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
This configuration ensures effective water removal with reduced pressure loss and component complexity, allowing for efficient operation and cost reduction, while maintaining hydrogen explosion protection and convenience in design and use.
Implementation Method 1
a vacuum chamber configured to suck inside of the suction nozzle; and a vacuum pump configured to evacuate the vacuum chamber
Data Source
AI summary
A suction method that sucks inside of a filling nozzle used for supply of hydrogen by using a suction nozzle that is engaged with the filling nozzle, the suction method comprising: evacuating a vacuum chamber by using a vacuum pump; and sucking inside of the suction nozzle by using the evacuated vacuum chamber.