Roof Extension for Cable Distribution Cabinet EMC Expansion
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Solution Overview
Problem
Existing cable distribution cabinets lack sufficient space for accommodating active technical components due to their ventilated installation spaces, which are not EMC-tight, and expanding these cabinets requires extensive excavation and permits.
Innovation Solution
A modular roof attachment that divides the roof space into an upper, sealed EMC-tight area for active components and a lower ventilated area, allowing for easy expansion of existing cabinets by replacing the existing roof with a new attachment that includes a lower open roof space for ventilation and cable routing, using a kit of interchangeable parts made from plastic and metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cabinet is expanded by excavating new installation space in the ground, then more space for active components is available, but the expansion becomes time-consuming and expensive requiring permits
Solution Approach 1:
The patent transitions from horizontal expansion (excavating ground space) to vertical expansion (adding roof attachment space). The roof attachment creates additional installation volume upward rather than requiring ground excavation, thereby increasing component capacity without the time-consuming permitting process associated with ground works.
Solution Approach 2:
The roof attachment structure nests additional installation space within the existing cabinet footprint by extending vertically upward. The attachment frame, support posts, and roof panels form a nested structure that accommodates EMC-tight enclosures for active components without requiring external ground expansion.
2Volume of moving object
If the existing ventilated installation space is used for active components, then space is available, but EMC-tightness cannot be achieved
Solution Approach 1:
The roof attachment divides the installation space into two distinct segments: the lower existing ventilated space for passive components and the upper new EMC-tight space for active components. This segmentation allows each zone to fulfill its specific functional requirements simultaneously within the same cabinet structure.
Solution Approach 2:
Different quality requirements are applied to different regions of the installation space. The upper roof attachment space is designed with EMC-tight properties (shielding, sealed enclosures) specifically where active components are located, while the lower space maintains its ventilated structure suitable for passive components. Each region's properties are optimized for its intended use.
3Reliability
If a sealed EMC-tight installation space is created for active components, then EMC-tightness is achieved, but ventilation for passive components is compromised
Solution Approach 1:
The installation space is segmented into two functional zones: an upper EMC-tight sealed space for active components and a lower ventilated space for passive components. The intermediate floor with cable access openings physically separates these zones, allowing each to maintain its required environmental characteristics independently.
Solution Approach 2:
The intermediate floor acts as an intermediary structure between the EMC-tight upper space and the ventilated lower space. It provides cable access openings that allow electrical connections while maintaining the separation between the two environmental zones, enabling both ventilation and EMC-protection functions to coexist.
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
Enables quick and inexpensive expansion of cable distribution cabinets to accommodate active components without the need for new installations, ensuring EMC-tightness and ventilation, reducing downtime and excavation work.
Implementation Method 1
a lower roof space which is open at the bottom and has ventilation openings (6) to the outside, forming a common space with the lower installation space (13) of the old cabinet space below, which serves to ventilate the old cabinet installation space (13) together with the lower roof space (3)
Implementation Method 2
ventilation openings, preferably in the lower and upper area, to allow air flows through the interior generated by the chimney effect to achieve passive ventilation of the cabinet and, above all, to avoid the formation of condensation inside
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The frame has a thick upper loft, and a lower loft that is placed under the upper loft and is open downwardly. A false floor (5) is provided for separating the upper and lower lofts, and is arranged at an elevation above a lower stacking frame (14), which rotates in a horizontal manner. A sealable cable outlet runs from the lower loft to the upper loft through the false floor. Air-outlet openings are formed as gills (6) by outwardly compressed characteristic of metal plates such as aluminum plate of walls. Independent claims are also included for the following: (1) a construction set for creating a roof top frame for a cable distribution box (2) a method for extending a cable distribution box.