Retainable Air Filter With Snap-Fit Pre-Filter Assembly
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Solution Overview
Problem
Traditional air filtration systems face issues with larger particle accumulation, leading to reduced efficiency and frequent replacements, which contribute to environmental waste and economic impracticality. Additionally, fixed pre-filters limit customization and adaptability.
Innovation Solution
A retainer frame is used to securely hold a washable and reusable pre-filter in place, allowing for easy removal, installation, and potential re-use. The pre-filter assembly is detachable and can be secured to the perimeter frame using a snap-fit interface or interlocking features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pre-filter is permanently fixed to the primary filter using glue, then the pre-filter is securely held in place, but the pre-filter becomes disposable and contributes to environmental waste
Solution Approach 1:
The pre-filter assembly is segmented into separate components: the pre-filter element and the retainer frame. This allows the pre-filter to be easily removed and replaced without damaging the retainer frame or perimeter frame, enabling reuse of the retainer frame while only replacing the pre-filter element when needed.
Solution Approach 2:
The design allows the pre-filter element to be discarded when saturated while the retainer frame is recovered and reused. The snap-fit interface enables quick detachment of the pre-filter element from the retainer frame, facilitating the discard-and-recover cycle without waste.
2Stability of the object's composition
If a pre-filter is permanently fixed to the primary filter, then the pre-filter remains in place during operation, but replacement and maintenance become inconvenient and time-consuming
Solution Approach 1:
The attachment mechanism transitions from a static permanent bond (glue) to a dynamic reversible connection (snap-fit). This allows the pre-filter assembly to be easily inserted and removed by simply engaging or disengaging the snap-fit interface between the retainer frame and perimeter frame.
Solution Approach 2:
The pre-filter assembly is extracted as a separate removable unit from the primary filter system. The retainer frame with pre-filter element can be detached from the perimeter frame as a complete assembly, allowing for quick replacement without disturbing the primary filter or housing.
3Stability of the object's composition
If a pre-filter is permanently fixed to the primary filter, then the filter assembly is structurally integrated, but customization and adaptability are limited
Solution Approach 1:
The filter system is segmented into modular components with standardized interfaces. The retainer frame uses a universal snap-fit interface that can accommodate different pre-filter element types, enabling customization while maintaining structural integration during operation.
Solution Approach 2:
The retainer frame with its snap-fit interface serves multiple functions: it holds various types of pre-filter elements, maintains proper positioning during operation, and enables easy replacement. This universal design allows the same retainer frame to work with different pre-filter configurations.
4Device complexity
If traditional filtration systems are used without a pre-filter, then the system is simpler, but larger particles accumulate and reduce filtration efficiency
Solution Approach 1:
The pre-filter element performs preliminary filtration by capturing larger particles before air reaches the primary filter. This pre-capture action prevents particle accumulation on the primary filter, maintaining high filtration efficiency over extended periods.
Solution Approach 2:
The filtration function is segmented into two stages: coarse filtration by the pre-filter element and fine filtration by the primary filter. This segmentation allows each filter to specialize in capturing specific particle sizes, improving overall system efficiency.
Data Source
AI summary
A detachable pre-filter assembly, an air filter with the detachable pre-filter assembly, and an air-filtration enabled device featuring the air filter with the detachable pre-filter assembly are provided. The air filter includes a perimeter frame that defines a cavity, a filter element disposed within the cavity, and a pre-filter assembly secured to the perimeter frame in a detachable configuration. The pre-filter assembly includes a pre-filter element disposed adjacent to the filter element and a retainer element disposed adjacent to the pre-filter element. The retainer element retains the pre-filter element adjacent to the filter element and engages with the perimeter frame. Thus, the retainer element retains the washable and reusable pre-filter element in place, while allowing removal, installation, and potential re-use of the pre-filter element with ease.