Gas-Liquid Separator Structure for Cold-Weather Water Drainage
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Solution Overview
Problem
Gas-liquid separators for fuel cell vehicles face challenges in draining water when temperatures drop, as water can freeze near the electromagnetic on-off valve, preventing immediate drainage and increasing manufacturing costs with the use of heating devices.
Innovation Solution
A gas-liquid separator design featuring a housing with a first water storage portion, a second water storage portion, and a valve mechanism, where water overflows from the first to the second portion due to pressure differences, allowing for efficient drainage without the need for heating, and includes a lid-like member and rib structures to facilitate water flow and prevent freezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating device is provided in the gas-liquid separator to thaw frozen valve devices, then water can be drained in cold conditions, but manufacturing cost increases and energy consumption increases
Solution Approach 1:
The patent extracts the heating function from the main system by using the exothermic heat of condensation of water vapor separately. The condensation occurs in the gas-liquid separation chamber, and the released heat is utilized to prevent freezing in the water storage chamber, eliminating the need for a dedicated heating device while maintaining drainage reliability in cold conditions.
Solution Approach 2:
The system uses its own operational process (condensation of water vapor) to generate the heat needed for preventing freezing. The condensation heat automatically serves the anti-freezing function without requiring external energy input or additional heating components, enabling the system to self-regulate temperature in cold environments.
2Reliability
If a heating device is provided in the gas-liquid separator to thaw frozen valve devices, then water can be drained in cold conditions, but energy consumption increases
Solution Approach 1:
The patent converts the potentially harmful cold environment into a beneficial heating source. The condensation of water vapor, which would otherwise be waste heat, is utilized to prevent freezing in the water storage chamber. This transforms the cold external environment's challenge into an internal heat source, eliminating the need for additional energy consumption.
Solution Approach 2:
The system recovers the heat energy that would otherwise be discarded during the condensation process. By capturing and utilizing the exothermic heat of condensation in the gas-liquid separation chamber for preventing freezing in the water storage chamber, the system recovers wasted energy and eliminates the need for external heating energy input.
3Quantity of substance
If water is allowed to accumulate in the bottom part of the gas-liquid separator, then all separated water can be collected, but water may freeze near the electromagnetic on-off valve preventing drainage
Solution Approach 1:
The patent segments the internal space into distinct functional zones: a gas-liquid separation chamber for condensing and separating water vapor from gas, and a water storage chamber for collecting separated water. The partition wall with its lower end above the bottom surface creates separate functional areas that prevent water accumulation near the drainage valve while maintaining adequate collection capacity in the dedicated storage zone.
Solution Approach 2:
The partition wall acts as an intermediary structure between the gas-liquid separation chamber and the water storage chamber. By positioning the lower end of the partition wall above the bottom surface, it creates a protective barrier that prevents water from accumulating near the electromagnetic on-off valve, ensuring reliable drainage operation.
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 design enables reliable drainage of water from the second water storage portion and prevents water accumulation near the valve mechanism, reducing energy consumption and manufacturing costs by eliminating the need for heating devices.
Implementation Method 1
a gas-liquid separation portion that is located in an upper part of the housing and that separates water from the water-containing gas
Implementation Method 2
a first water storage portion that is located in a lower part of the housing and that receives and stores the water separated by the gas-liquid separation portion
Implementation Method 3
when the water in the second water storage portion is drained by opening the valve mechanism, the pressure in the second water storage portion drops, so that the pressure in the first water storage portion rises relative to the pressure in the second water storage portion. This pressure difference causes the water in the first water storage portion to overflow the upper end of the tubular wall and flow into the second water storage portion
Data Source
AI summary
A gas-liquid separator is structured that can satisfactorily drain water even when used in a low-temperature environment and that prevents water from being stored near an electromagnetic on-off valve after a fuel cell stops generating electricity. The gas-liquid separator includes: a gas-liquid separation portion that separates water from water-containing gas in an upper part of a housing; an annular first water storage portion that receives and stores the water in a lower part of the housing; a second water storage portion located below the first water storage portion; and a valve mechanism that opens and closes a drain channel. The gas-liquid separator further includes: a tubular wall that is located inside the first water storage portion and guides the water having overflowed the tubular wall into the second water storage portion; and a lid-like member covering an upper side of the tubular wall.