Pleated Filter Element With Internal Adhesive Walls for Shape Stability
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Solution Overview
Problem
Existing filter elements face challenges in stabilization and production efficiency, particularly in regions near end face edges, requiring additional sealing or stabilization components, which can impair filtration quality and increase production complexity.
Innovation Solution
A filter element with a fold pack formed by a zigzag-shaped filter medium, where neighboring fold sections are connected by an adhesive line that extends obliquely or offset to the fold edges, providing internal stabilization without additional components, and an adhesive wall that guides flow and enhances shape stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional stabilization elements (lateral strips, head strips) are added to the filter element, then the shape stability and sealing are improved, but the device complexity and production cost increase
Solution Approach 1:
The patent merges the stabilization function into the fold pack structure itself by creating adhesive walls that connect fold sections internally. This eliminates the need for separate lateral strips and head strips, as the fold pack becomes self-stabilizing through the adhesive connections between its own fold sections.
Solution Approach 2:
The patent extracts the stabilization function from external components (lateral strips, head strips) and relocates it into the internal structure of the fold pack. The adhesive walls are formed within the fold pack by connecting fold sections, thereby removing the need for separate stabilization elements.
2Reliability
If additional sealing components are added to seal regions near end face edges, then the sealing quality is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the sealing function into the adhesive walls that are already formed within the fold pack. The same adhesive connections that stabilize the fold structure also provide sealing between the raw air space and clean air space, eliminating the need for separate sealing components in the end face regions.
Solution Approach 2:
The adhesive walls serve multiple functions simultaneously: they stabilize the fold pack structure, seal the regions between fold sections, and guide the flow of air through the filter element. This multi-functionality reduces the total number of components needed.
3Strength
If plastic reinforcement parts are inserted and glued to the filter medium, then the mechanical strength is improved, but the production time and complexity increase
Solution Approach 1:
The patent merges the reinforcement function into the adhesive walls formed within the fold pack. The adhesive connections between fold sections provide the necessary mechanical strength without requiring separate plastic reinforcement parts, thereby eliminating insertion and gluing steps for additional components.
Solution Approach 2:
The fold pack structure reinforces itself through the adhesive connections between its own fold sections. The internal adhesive walls provide the necessary mechanical strength and stability without requiring external reinforcement parts to be added during production.
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
The solution improves filtration quality by preventing deformation and enhancing mechanical resistance, reduces production complexity by eliminating the need for additional stabilization elements, and optimizes flow guidance within the filter element.
Implementation Method 1
at least two directly neighboring fold sections are connected to each other along an adhesive line by an adhesive connection by means of an adhesive material
Data Source
AI summary
A filter element for filtering fluid has a fold pack formed of a filter medium folded in a zigzag shape or corrugated shape and provided with fold sections delimited by fold edges. The fold sections include at least two directly neighboring fold sections connected to each other by an adhesive connection of an adhesive material and extending along an adhesive line. The adhesive line extends at least in sections obliquely to the fold edge positioned between the at least two directly neighboring fold sections or the adhesive line extends offset along the fold edge positioned between the at least two directly neighboring fold sections. A filter element with one or more adhesive walls of an adhesive material extending within the fold pack and formed by adhesive connections of directly neighboring fold sections of the fold pack is provided. A method for producing such filter elements is provided.