Interlocking Filter Cartridge for Correct Housing Installation
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Solution Overview
Problem
Existing filtration assemblies face challenges in ensuring proper installation and alignment of filter cartridges, preventing improper cartridge installation, and maintaining a no-filter-no-run condition, while being mechanically robust, cost-effective, and not requiring modifications to the filter head.
Innovation Solution
A filtration assembly design featuring a filter housing main part with a recess arrangement and a filter cartridge with radial extensions that interlock, making improper installation difficult and ensuring the cartridge is positioned correctly, with features like deformable materials and blocking mechanisms to prevent assembly without a cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter cartridge is used in a filtration assembly, then filtration function is provided, but it is difficult to ensure proper installation and alignment
Solution Approach 1:
The filter cartridge features an asymmetric design with a non-circular cross-section that corresponds to a matching asymmetric receptacle in the filter housing. This asymmetry ensures that the cartridge can only be installed in the correct orientation, automatically achieving proper alignment without requiring additional alignment features or complex installation procedures.
Solution Approach 2:
The filter cartridge is nested within the filter housing receptacle, with the cartridge outer surface fitting into the receptacle cavity. This nesting arrangement ensures that the cartridge is properly positioned and retained within the housing, maintaining reliable installation while allowing for straightforward installation and removal operations.
2Reliability
If features are added to ensure proper alignment and interaction, then installation reliability improves, but device complexity increases
Solution Approach 1:
The asymmetric cross-sectional shape serves as both the structural form and the alignment mechanism. The non-circular geometry inherently provides alignment features without requiring additional protrusions, recesses, or marking indicators, thereby maintaining simple device construction while ensuring reliable proper installation.
Solution Approach 2:
The asymmetric outer surface of the filter cartridge serves multiple functions simultaneously: it provides structural support, enables proper alignment during installation, and ensures correct orientation within the housing. This multi-functionality eliminates the need for separate alignment features, reducing overall device complexity.
3Object-affected harmful factors
If the filter cartridge remains attached to the bowl during removal, then liquid contamination is prevented and servicing clearance is reduced, but the attachment mechanism must be mechanically robust
Solution Approach 1:
The filter cartridge is nested within the filter housing receptacle with the cartridge outer surface fitting into the receptacle cavity. This nesting arrangement creates a mechanically robust attachment where the cartridge remains securely held during removal operations, preventing liquid discharge while allowing for straightforward servicing with reduced clearance requirements.
Solution Approach 2:
The filter assembly utilizes composite construction with the filter cartridge made from materials that provide both filtration functionality and mechanical strength for robust attachment. The combination of materials ensures the attachment mechanism can withstand removal forces while preventing liquid contamination during servicing.
Data Source
AI summary
A filter assembly is disclosed comprising a filter cartridge, a filter housing end part, and a filter housing main part, said filter housing main part being adapted for receiving said filter cartridge and for being connected to the housing end part by screwing, whereinsaid filter housing main part comprises a first longitudinal axis and a main opening, said main opening being defined by a first end portion, said first end portion comprising an upper, interrupted rim and a first threaded portion arranged below said upper rim;said first end portion comprising a recess arrangement comprising one or more axially extending recesses, said one or more axially extending recesses at least partially interrupting said first threaded portion;said filter cartridge comprises a second longitudinal axis and a first end cap, said first end cap comprising a central portion and a radial extension arrangement comprising one or more radial extensions extending radially away from said central portion; andwherein said radial extension arrangement is adapted for being receivable or received by said recess arrangement; and associated cartridges.