Cable Passage Wall Structure for IP43 Pollutant Blocking
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Solution Overview
Problem
Existing solutions for ensuring IP43 protection in emergency lighting devices by sealing cable openings incur additional production and integration costs, as they require custom-made rubber elements.
Innovation Solution
A serpentine cable path is created using a chute and ramp configuration within the enclosure wall, featuring an elbow and ascending ramp to prevent foreign body intrusion and liquid entry, with a deflector to divert solids, ensuring passive retention and compliance with the IP43 standard without custom-made components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a custom-made rubber element is used to seal the cable opening, then IP43 protection is achieved, but production and integration costs increase
Solution Approach 1:
The sealing function is merged with the cable conduit structure itself. The conduit includes an elbow portion and a ramp portion that work together to provide both cable routing and sealing functions, eliminating the need for separate rubber sealing elements while maintaining IP43 protection rating
Solution Approach 2:
The cable conduit structure serves itself by incorporating the sealing mechanism within its own geometry. The elbow and ramp portions create a self-sealing effect that prevents pollutant intrusion without requiring additional sealing components, making the system self-sufficient
2Ease of operation
If a through opening is formed in the wall for cable routing, then cable connection is enabled, but pollutant penetration increases
Solution Approach 1:
The cable conduit incorporates curved geometry with an elbow portion and a ramp portion instead of a straight through-opening. This curved path creates natural barriers that prevent pollutants from directly penetrating through the opening while still allowing cable routing functionality
Solution Approach 2:
The sealing solution moves from a two-dimensional flat seal to a three-dimensional volumetric structure. The conduit extends through the wall with elevated portions (elbow and ramp) that create vertical barriers, utilizing the third dimension to block pollutant intrusion paths
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 effectively prevents intrusion of pollutants while reducing manufacturing costs by eliminating the need for custom-made seals, ensuring compliance with the IP43 standard through a passive retention mechanism.
Implementation Method 1
a ramp to ensure retention of liquid in the conduit by gravity
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5b
AI summary
The present invention relates to a boundary wall of an inner enclosure (I) intended to isolate at least one electrical equipment (20) from an external environment (E), this wall comprising: - a panel (14) in which a through opening is formed along a longitudinal direction; and - a cable tray (26) which jointly delimits with the panel a cable routing conduit between the external environment and the inner enclosure to connect said at least one electrical equipment to an external element, this conduit extending from the opening of the panel (14) forming an inlet opening to an outlet opening into the inner enclosure;characterized in that the conduit defines a serpentine cable path comprising: - a bend in the longitudinal extension of the opening which forms a stop surface configured to prevent the intrusion of foreign bodies into the inner enclosure (I) by entering the opening from the external environment (E); and - a ramp to ensure liquid retention in the conduit by gravity.