Push-Lock Filter Housing for Spill-Free Cartridge Replacement
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Solution Overview
Problem
Existing water filtration systems in refrigerators are difficult to replace due to complex designs and placements, often requiring manual insertion and removal with valve activation, leading to awkward access and potential spillage during filter changes.
Innovation Solution
A push-actuated filter housing assembly with a floating key lock mechanism that allows for easy attachment and detachment, featuring a filter key with protrusions for secure mating and a sliding lock for automatic fluid shutoff, enabling simple and tool-free filter replacement while preventing spillage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual insertion and removal with valve activation is used, then filter replacement is possible, but the operation becomes complex and awkward
Solution Approach 1:
The patent combines the filter replacement operation with automatic valve activation into a single integrated action. When the filter cartridge is removed from the housing, the valve mechanism is automatically activated through the mechanical movement itself, eliminating the need for separate manual valve operation and reducing overall system complexity
Solution Approach 2:
The valve mechanism is pre-positioned and mechanically linked to the filter cartridge installation/removal process. The valve is prepared in advance to activate automatically when the filter is removed, so that the user does not need to perform separate valve activation steps during filter replacement
2Ease of operation
If coplanar filter access with refrigerator wall is used, then space is saved, but access to filter cartridge becomes awkward
Solution Approach 1:
The patent transitions from a coplanar (2D) filter access design to a protruding (3D) design where the filter housing extends outward from the refrigerator wall. This dimensional change provides easier access to the filter cartridge while maintaining efficient use of refrigerator space through optimized protrusion geometry
3Ease of operation
If simple push mechanism is used, then filter replacement is simplified, but fluid spillage may occur during removal
Solution Approach 1:
The valve mechanism is pre-positioned and mechanically linked to the filter cartridge removal process. Before the filter is fully removed, the valve automatically closes in response to the mechanical movement, preventing fluid spillage while maintaining the simplicity of the push-based replacement operation
Solution Approach 2:
The valve mechanism serves as an intermediary element between the filter cartridge and the fluid supply. It mediates the transition during filter removal by automatically controlling fluid flow, preventing spillage without requiring complex user actions or additional sealing mechanisms
Data Source
AI summary
A filter assembly for fluid filtration having a push-activated lock and release mechanism. A push filter design activates a filter key lock upon insertion and extraction, where the filter key may be used simultaneously as a lock and as an identifier for particular filter attributes. The filter housing assembly may be attached to, and removed from, a filter base by a push-actuated release. Upon insertion, the filter key shifts the filter lock longitudinally to receive interlocking segments. Upon extraction, the same axial push shifts the filter lock further to align the interlocking fingers within gaps that allow for easy extraction. The specific key lock design allows a user to identify and match certain filter configurations received by the mechanical support, and reject other filter configurations.