Double Canvas Door Single Roller Insulation
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Solution Overview
Problem
Existing double-canvas doors with two winding rollers and motorized systems are complex, costly, and suffer from watertightness issues when closed, leading to leaks of temperature-controlled air.
Innovation Solution
A double-canvas door design featuring a single roller and motor for simultaneous canvas movement, with connected upper ends and a band to secure the intermediate chamber, enhancing insulation and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two winding rollers and motorized systems are used for each canvas, then the door can achieve reliable simultaneous movement of both canvases, but the construction becomes complex and costly
Solution Approach 1:
The patent merges two separate winding rollers and two motors into a single winding roller with a single motor. The band is folded to connect both canvases to this single roller, allowing simultaneous winding and unwinding of both canvases. This consolidation maintains functional reliability while dramatically reducing mechanical complexity and cost.
Solution Approach 2:
The single winding roller serves multiple functions: it winds both canvases simultaneously, provides the driving force for the entire door mechanism through one motor, and integrates the functions of what would traditionally require two separate roller-motor assemblies. The band connection system also serves dual purposes by connecting both canvases while allowing independent movement.
2Reliability
If two winding rollers are used for each canvas, then reliable canvas movement is achieved, but watertightness of the intermediate chamber deteriorates due to significant leaks of temperature-controlled air
Solution Approach 1:
By consolidating to a single winding roller positioned centrally, the patent creates a more compact upper assembly that allows for better sealing of the intermediate chamber. The single roller configuration reduces the number of sealing interfaces compared to two separate rollers, thereby improving watertightness and reducing leaks of temperature-controlled air.
3Device complexity
If a single roller and motor are used for simultaneous winding of both canvases, then construction is simplified and cost is reduced, but the connection mechanism becomes critical to maintain reliability
Solution Approach 1:
The band acts as an intermediary element that connects both canvases to the single winding roller. It transmits the winding force from the roller to both canvases simultaneously while allowing for slight movements and tensions differences. The connection profile serves as another intermediary, providing a structured interface that secures the band and canvases while maintaining proper alignment and tension distribution.
Solution Approach 2:
The connection profile uses parallel slots with specific dimensional parameters to secure the band and canvases. The slot dimensions, positions, and orientations are carefully designed to maintain proper tension and alignment. By optimizing these geometric parameters, the system achieves reliable simultaneous movement despite the simplified single-roller configuration.
Data Source
AI summary
The invention relates a double-canvas door; comprising a frame (1) provided with guides (2a, 2b) for moving the canvases (3a, 3b) between door open and closed positions, said canvases defining an intermediate chamber (8) therebetween. The door comprises a single motor-driven roller (6) for the simultaneous winding of both canvases, and a single motor (61) for actuating the roller, the upper ends of the canvases (3a, 3b) being connected to one another and to a band (5) coupled to the winding roller (6), said connection closing the upper end of the intermediate chamber (8) when the door is closed.