Fuel Cell Humidifier Sealing Frame Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional humidifiers for fuel cell systems have complex structures due to the airtight separation of cathode supply and exhaust air, which complicates the humidification process.
Innovation Solution
A humidifier design featuring a membrane stack with transversely aligned first side surfaces for air flow and airtight third side surfaces, utilizing sealing frames with frame-shaped contact areas and retaining edges to create a groove filled with adhesive for bonding, ensuring airtight separation and integration of the membrane stack within a housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If airtight separation of cathode supply air and cathode exhaust air is implemented using multiple seals, then sealing reliability is improved, but device complexity increases significantly
Solution Approach 1:
The patent extracts the sealing function from multiple separate seal components and concentrates it into a single integrated sealing frame. The sealing frame includes a contact area for airtight contact with the membrane stack and retaining edges that protrude to engage with grooves in the housing, thereby achieving reliable sealing while eliminating the complexity of multiple separate seal elements.
Solution Approach 2:
The patent merges the sealing frame, contact area, and retaining edges into a single integrated component structure. This unified sealing frame combines multiple sealing functions into one element that simultaneously provides airtight contact and mechanical retention, reducing device complexity while maintaining sealing reliability.
2Reliability
If membrane stack is securely retained in housing, then sealing reliability is improved, but ease of manufacture deteriorates due to complex assembly
Solution Approach 1:
The sealing frame is pre-assembled with the membrane stack before installation into the housing. The retaining edges of the sealing frame are designed to engage with pre-formed grooves in the housing, allowing the membrane stack assembly to be installed as a single unit. This preliminary assembly simplifies the manufacturing process while ensuring reliable sealing.
3Reliability
If contact area of sealing frame is enlarged for better sealing, then sealing reliability is improved, but air flow through first side surfaces is restricted
Solution Approach 1:
The sealing frame is designed with differentiated local properties: the contact area has a larger surface for reliable sealing contact with the membrane stack, while the retaining edges are positioned to engage with grooves without interfering with air flow paths. This local differentiation allows the contact area to be enlarged for sealing purposes without restricting air flow through the first side surfaces.
Solution Approach 2:
The sealing frame extends in multiple dimensions: the contact area provides broad surface contact for sealing, while the retaining edges protrude in a different dimension to engage with grooves. This multi-dimensional configuration allows the sealing function to be enhanced without blocking the air flow path through the membrane stack.
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 simplifies the structure while maintaining airtight separation and effective humidification of cathode supply air using cathode exhaust air, reducing complexity and enhancing sealing reliability.
Implementation Method 1
The membranes are impermeable to air and permeable to water vapor, so that the cathode supply air and the cathode exhaust air are separated by the membranes and the cathode supply air can still be humidified through the membranes with the cathode exhaust air
Implementation Method 2
The respective groove is filled with an adhesive and the respective sealing frame is bonded to the membrane stack in a sealing manner
Data Source
AI summary
A humidifier for humidifying a dry cathode supply air via a humid cathode exhaust air in a fuel cell system, may include a housing, a membrane stack, and/or a sealing arrangement. The membrane stack may include a plurality of membranes, two first side surfaces, two second side surfaces, and/or two third side surfaces. The plurality of membranes may be stacked on one another transversely to a longitudinal direction of the membrane stack. The first side surfaces may be arranged opposite one another. The second side surfaces may be arranged opposite one another. The third side surfaces may be arranged opposite one another. The sealing arrangement may include two sealing frames, each of the sealing frames is assigned to one of the respective first side surfaces. Each of the sealing frames may have a frame-shaped contact area and a retaining edge protruding from the contact area.