Air Cleaner Casing Minute Protrusion Adhesive Retention
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Solution Overview
Problem
Air cleaners with looped application surfaces face issues with adhesive flowability, leading to unstable filter element securing due to adhesive not staying on the surface, requiring excessive adhesive usage.
Innovation Solution
Incorporating a minute protrusion on the inner side of the looped application surface to utilize surface tension and retain the adhesive, allowing for stable filter element securing with reduced adhesive amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to a looped application surface to secure a filter element, then the filter element can be secured to the casing, but the adhesive flows out to the inner side due to its flowability, causing unstable securing and requiring increased adhesive amount
Solution Approach 1:
The application surface is divided into two functional zones: a looped application surface for adhesive application and a minute protrusion that segments the adhesive flow path. The protrusion creates a physical barrier that divides the adhesive into retained portions and prevents uncontrolled flow to the inner side, thereby improving securing stability while controlling adhesive quantity.
Solution Approach 2:
The invention transitions from a two-dimensional flat application surface to a three-dimensional structure by adding a minute protrusion that extends from the application surface toward the inner side. This dimensional addition creates a new spatial zone that restrains adhesive flow and improves securing reliability without significantly increasing adhesive amount.
2Reliability
If the amount of adhesive is increased to keep it on the application surface, then adhesive retention improves, but the overall adhesive usage increases
Solution Approach 1:
The minute protrusion acts as an intermediary structure between the application surface and the inner side space. It provides a physical barrier that mediates adhesive flow, allowing the adhesive to be retained on the application surface without requiring increased quantity. The protrusion intercepts the adhesive's natural flow path and redirects it to remain on the intended surface.
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 minute protrusion effectively retains adhesive on the surface, securing the filter element stably with less adhesive, preventing adhesive flow into the inner side and reducing overall adhesive usage.
Implementation Method 1
since the minute protrusion is provided, the surface of the adhesive applied to the application surface tends to be rounded by surface tension. Thus, the adhesive applied to the application surface is restrained from moving toward the inner side
Data Source
AI summary
An air cleaner includes an upper casing, which has an inlet, a lower casing, which has an outlet and covers the lower opening of the upper casing, and a filter element, which is located inside the upper casing and the lower casing. The lower casing includes a looped application surface, on which an adhesive is applied to adhere the filter element, and a minute protrusion, which extends along the perimeter, is formed on the inner peripheral edge of the application surface.