Filter Frame Closing Device for Safe Air Purifier Maintenance

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Solution Overview

Problem

Existing air filters and cartridges pose a risk of user exposure to particles and allergens when manually replacing them, especially when protective equipment is worn, making handling difficult and potentially irritating.

Innovation Solution

A closing device is integrated into the filter frame that can be actuated to cover the filter medium, utilizing pivotable slats with a link control mechanism and sealing lips to prevent user contact during filter changes, ensuring a secure seal and easy operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the filter medium is exposed during manual replacement, then the user can easily access and replace the filter, but the user comes into contact with particles and allergens on the filter surface

Engineering Contradiction:

Improveease of filter replacementVSAvoiduser exposure to particles and allergens

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The closing device is pre-positioned on the filter frame and can be activated to cover the filter medium before the user makes full contact with it during replacement, preventing exposure to particles and allergens accumulated on the filter surface

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The closing device acts as an intermediary barrier between the user and the filter medium, providing a protective interface that allows filter replacement while preventing direct contact with harmful particles and allergens

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the closing device covers the filter medium, then user contact with particles is prevented, but the device complexity increases

Engineering Contradiction:

Improveprotection from particles and allergensVSAvoidcomplexity of filter structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The closing device is divided into multiple pivotable slats that can independently rotate to cover the filter medium, allowing a complex protective function to be achieved through simple, modular components that attach to the filter frame

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The closing device uses pivotable slats that can dynamically change from an open position during operation to a closed position during filter replacement, providing protection only when needed while maintaining operational simplicity

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3995199B1Filter and air purification device

Publication Date: 2022.12.28 CARL FREUDENBERG KG

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AI summary

The invention relates to a filter and an air purification device with such a filter. The filter (100) for cleaning an airflow (L) has at least one filter medium (1) and a frame (2) for receiving the filter medium (1). According to the invention, a closing device (3) is provided on the frame (2) for covering the filter medium (1). The invention provides a filter that is easy to handle and protects users from contact with substances accumulated on the filter medium when changing the filter.