Ventilating Device Filter Membrane Mounting via Adhesive Frame
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Solution Overview
Problem
Existing ventilation devices for closed containers in motor vehicles face challenges in securely mounting gas-permeable and liquid-impermeable filter membranes due to their smooth surfaces, leading to difficulties in assembly and potential deformation under pressure or negative pressure.
Innovation Solution
A frame with an axial through-opening and a radially circumferential annular space filled with a hardenable adhesive is used to securely fasten the filter membrane, which is then inserted into a filter housing, ensuring a strong and easy installation process. The frame consists of two ring-shaped parts connected via an annular groove and slot, with a sealing ring and wire mesh support to prevent deformation and facilitate easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the filter membrane is directly mounted in the filter housing, then the structure is simple, but the filter membrane cannot be securely fastened due to its smooth surface
Solution Approach 1:
A frame with an annular groove acts as an intermediary between the filter membrane and the filter housing. The frame provides a structured mounting interface that can securely hold the smooth filter membrane, while the filter housing simply receives the framed membrane assembly. This mediator structure resolves the contradiction by providing secure mounting capability without significantly increasing overall device complexity.
Solution Approach 2:
The filter membrane is transformed from a standalone component to a framed assembly where the membrane is bonded to a rigid frame structure. This parameter change in the membrane's structural configuration enables secure mounting while maintaining the membrane's filtering function. The frame provides the necessary mechanical interface for reliable installation.
2Reliability
If additional holding elements are added to secure the filter membrane, then mounting security is improved, but device complexity increases
Solution Approach 1:
The holding function is merged into the frame structure itself through the annular groove design. Instead of adding separate holding elements, the frame's groove geometry integrates the securing function directly into the mounting structure. This combination approach provides reliable membrane retention while avoiding the proliferation of additional components.
3Reliability
If the filter membrane is firmly fixed to prevent deformation, then reliability is improved, but ease of manufacture decreases
Solution Approach 1:
The filter membrane is pre-assembled with the frame in a controlled manner using the annular groove structure. This preliminary assembly creates a stable, pre-configured unit that prevents membrane deformation during subsequent installation into the filter housing. The pre-established frame-membrane connection ensures reliability while simplifying the final assembly process.
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
The solution provides a secure, easy-to-install, and durable filter membrane assembly that prevents deformation and ensures reliable ventilation and venting of containers, reducing the need for additional holding elements and simplifying the device's construction and maintenance.
Implementation Method 1
which is filled with a hardenable adhesive and into which the filter membrane protrudes with its radially circumferential edge region via the annular opening
Implementation Method 2
a gas-permeable and liquid-impermeable filter membrane, the filter membrane forming a filter insert
Implementation Method 3
The filter membrane lets the air through, but rejects the oil contained in the air
Data Source
AI summary
The invention relates to a ventilating device for an oil-containing closed container of a motor vehicle, having a conduit which connects the container to the atmosphere and enables an equalisation of pressure to the environment when the volume changes in the container. A filter housing (1) disposed in the conduit is divided by a gas-permeable and fluid-impermeable filter membrane, wherein the filter membrane forming a filter insert (11) is disposed on a frame (10) which can be releasably inserted into the interior of the filter housing (1) and of which the cross-section corresponds to the cross-section of the interior of the filter housing (1) and wherein a first part of the conduit leads from the container to one side of the filter membrane and a second part of the conduit leads from the second side of the filter membrane to the environment. The frame (10), which has a through opening (14), comprises a radially circumferential annular space having an annular opening which leads outwards, which annular space is filled with a curable adhesive and into which the radially circumferential edge region of the filter membrane protrudes through the annular opening.