Air Filter Curtain Stability via Channel Attachment

Solution Overview

Problem

Air filters mounted in horizontally oriented passages tend to collapse, leading to decreased filtering efficiency, especially at the upper portion, and existing solutions complicate and increase the manufacturing cost.

Innovation Solution

Attaching the upper portion of the filter body to the inner surface of the channel-shaped element and optionally the peripheral portion using attachment means like double-faced tape, glue, or weld joints, preventing collapse without significantly increasing manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If partition walls are added to prevent filter body collapse, then filter body stability is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvefilter body stabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The filter body is divided into multiple independent curtains that can be separately attached to the filter frame. This segmentation allows each curtain to be independently supported by the frame structure without requiring additional partition walls, thus maintaining stability while simplifying manufacturing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter body uses flexible fibre curtains that are attached at their ends to the filter frame. The flexibility of these thin film structures allows them to maintain their shape and prevent collapse through proper attachment geometry rather than rigid partition walls, reducing manufacturing complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

2Stability of the object's composition

If partition walls are added to support filter body, then filter body collapse is prevented, but manufacturing cost increases

Engineering Contradiction:

Improvefilter body stabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The filter body is divided into multiple independent curtains that can be separately attached to the filter frame. This segmentation allows each curtain to be independently supported by the frame structure without requiring additional partition walls, thus maintaining stability while simplifying manufacturing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter body uses flexible fibre curtains that are attached at their ends to the filter frame. The flexibility of these thin film structures allows them to maintain their shape and prevent collapse through proper attachment geometry rather than rigid partition walls, reducing manufacturing complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of manufacture

If filter body is left unattached, then manufacturing is simpler, but filter body collapses in horizontal passages

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidfilter body stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The filter body is divided into multiple independent curtains that can be separately attached to the filter frame. This segmentation allows each curtain to be independently supported by the frame structure without requiring additional partition walls, thus maintaining stability while simplifying manufacturing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter body uses flexible fibre curtains that are attached at their ends to the filter frame. The flexibility of these thin film structures allows them to maintain their shape and prevent collapse through proper attachment geometry rather than rigid partition walls, reducing manufacturing complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

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

Prevents filter body collapse in horizontally oriented air filters, maintaining filtering efficiency and simplifying the mounting process without substantial manufacturing cost increases.

Implementation Method 1

a filter body, which, comprises a plurality of curtains of electrostatically chargeable fibres

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Implementation Method 2

such an air filter comprises a filter body with a plurality of curtains of electrostatically chargeable fibres which separate particles from the air both by mechanical and electrostatical action

Methodology Applied

Scientific EffectMechanical filtration: Filter (physical)

Data Source

PatentEP1973666B1An air filter and a method for manufacturing such an air filter

Publication Date: 2013.03.13 ZEHNDER GROUP NORDIC

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AI summary

The present invention relates to an air filter and a method for manu¬ facturing such an air filter. The air filter comprises a filter frame (20) with passages for air, which is adapted to be attached inside a channel-shaped element (28), and a filter body, which comprises a plurality of curtains (19) of electrostatically chargeable fibres, which are attached to the filter frame (20) such that the filter body obtains an extension from the filter frame (20) to a position at a distance from and downstream the filter frame with respect to the intended flow direction of the air through the air filter. The air filter comprises attachment means (31 ) which is adapted to attach fibres in at least a peripheral portion of the filter body against a wall surface of the channel-shaped element (28).