Acoustic Roller Shutter Box with Cellular PVC Boards
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Solution Overview
Problem
Conventional roller shutter boxes are noisy due to inadequate sound insulation, particularly when protruding inside a building during window renovation, and existing solutions do not effectively integrate with masonry for improved acoustic performance.
Innovation Solution
A roller shutter box design featuring rear, upper, and lower boards with internal and external walls and a plurality of cells having cross sections in the shape of circles, hexagons, or pentagons with inclined sides, made of polyvinyl chloride, which enhances acoustic insulation and mechanical strength by promoting energy dissipation and reflection of sound waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional double-walled PVC boards are used for the roller shutter box, then the mechanical structure is simple and easy to manufacture, but the acoustic insulation performance is insufficient
Solution Approach 1:
The board is segmented into multiple cells (cavities) within the wall structure. Instead of a solid or simple double-walled construction, the wall is divided into numerous small cellular compartments that trap and dissipate sound energy, significantly improving acoustic insulation while maintaining the overall board structure
Solution Approach 2:
The cells are given curved or rounded cross-sectional shapes rather than simple rectangular forms. This curvature helps to scatter and reflect sound waves more effectively throughout the cellular structure, enhancing the acoustic insulation performance of the board
2Ease of operation
If the box is mounted cantilevered on the window frame, then installation is simplified, but mechanical strength requirements increase
Solution Approach 1:
The box is divided into multiple boards (front, rear, upper, lower) that are assembled together to form the complete structure. This segmentation allows each board to be individually optimized for strength while maintaining ease of installation through modular assembly
Solution Approach 2:
The boards are constructed as composite structures with multiple walls and cellular cavities, combining the strength of the PVC material with the structural efficiency of the cellular configuration. This provides the necessary mechanical strength for cantilevered mounting while keeping the overall design practical
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 design significantly increases acoustic insulation and mechanical resistance, effectively reducing noise transmission while maintaining structural integrity, making it suitable for mounting cantilevered on a window frame.
Implementation Method 1
The design significantly increases acoustic insulation and mechanical resistance, effectively reducing noise transmission while maintaining structural integrity
Data Source
Figure 1~3
Figure 4
AI summary
The present invention relates to an acoustic roller shutter box (10) comprising at least rear (11), upper (12), front (13), and lower (14) boards, notable in that the rear (11), upper (12), front (13), and lower (14) boards each have at least one internal wall (11a, 12a, 13a, 14a), one external wall (11b, 12b, 13b, 14b), and a plurality of cells (11c, 12c, 13c, 14c) extending longitudinally between said internal (11a, 12a, 13a, 14a) and external (11b, 12b, 13b, 14b) walls, and in that the cells (11c, 12c, 13c, 14c) of at least one of the boards have a cross-section in the shape of a closed curve, or of a polygon having at least one side inclined with respect to the associated internal (11a, 12a, 13a, 14a) and/or external (11b, 12b, 13b, 14b) wall(s) or of a closed hybrid line composed of an association of a curve and a polygon.