Rolling Door Vacuum Slat Sealing for Maintenance-Free Insulation
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Solution Overview
Problem
Existing rolling door slats have low thermal insulation R-values and require periodic maintenance to maintain vacuum, which is inefficient and costly.
Innovation Solution
A method to form a vacuum slat with hermetic seals at both ends, creating a permanent vacuum barrier that maintains high thermal insulation without the need for periodic maintenance, using caps and a vacuum pump to evacuate air and weld the caps to the slat ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional air-filled or foam-filled slats are used, then the slat structure is simple and manufacturing is easy, but the thermal insulation R-value is low (below 11)
Solution Approach 1:
The patent changes the physical parameter of the slat cavity from air-filled or foam-filled to vacuum-filled. By evacuating the air from the cavity and sealing it with hermetic end caps, the thermal insulation performance is dramatically improved (R-value increases from below 11 to above 20), while the basic slat structure remains relatively simple.
Solution Approach 2:
The patent creates a composite structure by combining the slat body with vacuum insulation. The hermetic end caps seal the vacuum cavity, creating a composite system that integrates structural support with high-performance thermal insulation, achieving R-values greater than 20 through the vacuum barrier rather than traditional insulating materials.
2Manufacturing precision
If vacuum insulation is implemented with removable caps and pumps, then thermal insulation performance improves, but periodic maintenance is required to maintain vacuum
Solution Approach 1:
The patent performs the vacuum creation and sealing action during the manufacturing process itself. The slats are evacuated and hermetically sealed at the factory before installation, eliminating the need for future maintenance. This preliminary action ensures the vacuum is established once and maintained indefinitely without requiring periodic pumping or cap removal.
Solution Approach 2:
The hermetic end caps provide permanent sealing that maintains the vacuum without requiring active maintenance. The system becomes self-sustaining, with the sealed vacuum cavity maintaining its insulation performance throughout the service life of the rolling door without needing external intervention or maintenance activities.
3Reliability
If hermetic seals are created at both ends of the slat, then permanent vacuum insulation is achieved without maintenance, but manufacturing complexity and cost increase
Solution Approach 1:
The patent divides the slat into distinct segments: the slat body, the hermetic end caps, and the vacuum cavity. This segmentation allows each component to be manufactured separately using standard processes, then assembled through welding or other joining methods. The modular approach manages manufacturing complexity by breaking down the hermetic sealing task into manageable steps.
Solution Approach 2:
The patent replaces complex mechanical vacuum maintenance systems (removable caps, pumps, valves) with a simple hermetic seal achieved through welding or permanent joining of end caps. This substitution eliminates the need for complex maintenance mechanisms while achieving the same vacuum insulation effect, thereby reducing long-term operational complexity despite increased initial manufacturing steps.
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 method significantly increases R-values to 30-40 and ensures long-term vacuum insulation without maintenance, enhancing thermal efficiency and reducing operational costs.
Implementation Method 1
evacuating air from the cavity to form a vacuum within the cavity
Implementation Method 2
a permanent vacuum insulation barrier is formed between the spaced opposing walls
Data Source
AI summary
A method of forming maintenance-free rolling door vacuum slats includes an elongate tubular member forming a cavity with a substantially uniform cross-sectional configuration along its length and forming first and second opposing ends conforming to the cross-sectional configuration. A first cap seals the first end. A second cap seals the second end, a vacuum being formed within the cavity. The first and second caps are joined to the elongate member to form a hermetic seals to render the slat airtight forming a permanent vacuum insulation barrier that requires no maintenance to restore the vacuum within the cavity.