Filter Cartridge Auto-Eject Interface for Secure Attachment
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Solution Overview
Problem
Current filter systems with reusable housings and replaceable cartridges face difficulties in easily removing the filter cartridge from the outer housing, often resulting in a mess due to the strong frictional engagement between the cartridge and housing, requiring significant axial force and potentially exposing the user to fluid during removal.
Innovation Solution
An auto-ejecting interface is introduced between the filter element and the filter base, featuring a filter base abutment shelf and a filter cartridge abutment catch, allowing the cartridge to transition from an inserted to a released position using gravity, facilitating easy removal by tipping the filter element upside down, and including a torsion lock arrangement to secure the filter element during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter cartridge is sealed to the filter housing with strong frictional engagement, then the filter element remains securely attached during operation, but it becomes difficult to remove the replaceable filter cartridge at service intervals
Solution Approach 1:
The filter cartridge and housing transition between two dynamic states: a locked state during operation where frictional engagement maintains secure attachment, and an unlocked state during maintenance where the cartridge can be easily removed. The system dynamically adjusts its engagement characteristics based on operational phase.
Solution Approach 2:
The frictional engagement parameter is changed between operational and maintenance modes. During operation, high friction is maintained through the sealing interface. During maintenance, the parameter is altered to allow easy removal, resolving the contradiction between secure attachment and ease of removal.
2Reliability
If significant axial force is required to remove the filter cartridge, then the filter element remains securely attached during operation, but it creates a significant mess and exposes the user to fluid during removal
Solution Approach 1:
The filter cartridge is designed to self-eject from the housing during maintenance by utilizing gravity when the element is inverted. The auto-ejecting interface allows the cartridge to transition to a released position using minimal force, eliminating the need for users to apply significant axial force that would cause fluid splashing and exposure.
3Object-affected harmful factors
If the filter cartridge is easily removable with minimal force, then user safety is improved by reducing fluid exposure, but the filter element may become loose during operation
Solution Approach 1:
The system dynamically transitions between a locked state during operation where the cartridge is securely attached, and an unlocked state during maintenance where easy removal is enabled. The auto-ejecting interface ensures the cartridge remains firmly secured during filtration while allowing simple removal when needed.
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 auto-ejecting interface enables the filter cartridge to be removed using a minimal amount of axial force, such as gravity, reducing the risk of fluid splashing and exposure, while maintaining secure attachment during operation, thus simplifying maintenance and improving user safety.
Implementation Method 1
the filter cartridge can be removed from the housing using a first amount of axial force (in one embodiment gravity when the filter element is inverted)
Data Source
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AI summary
A filter cartridge including catches for ejecting the filter cartridge from a filter housing as the filter cartridge and filter housing are removed from a filter base is provided. The catches are configured to engage corresponding catches of the filter base to limit axial motion of the filter cartridge as the filter cartridge and filter housing are threadedly removed from the filter base.