Plastic Panel Door with Flanged Pane Assembly for Thermal Insulation
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Solution Overview
Problem
Existing thermally insulated doors for refrigerated environments, particularly those using glass panels, are costly to manufacture and may not provide optimal thermal insulation or safety, while also limiting customization and energy efficiency.
Innovation Solution
A thermally insulated door design featuring a panel assembly with two transparent plastic panes, where one pane has flanges extending from its edges, forming a space with the other pane, and capped at both ends, allowing for customizable sizing, improved thermal insulation, and enhanced safety through shatterproof materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic panel doors are used instead of glass, then thermal insulation and safety are improved, but manufacturing cost increases
Solution Approach 1:
The door is divided into multiple transparent panes separated by spaced-apart flanges, creating a multi-chamber structure. This segmentation allows the use of thinner, less expensive plastic materials while maintaining insulation performance through the distributed air gaps between panes.
Solution Approach 2:
The invention changes the material parameter from glass to transparent plastic (acrylic or PETG), which provides inherent shatterproof properties. The plastic material parameter is combined with a specific flange spacing parameter (0.5-2 inches) to achieve optimal thermal insulation at reduced manufacturing cost.
2Reliability
If custom-sized doors are manufactured, then fit and thermal insulation are improved, but manufacturing complexity increases
Solution Approach 1:
The door panel is segmented into modular units with standardized flange spacing. This modular segmentation allows custom-sized doors to be assembled from repeating units, simplifying manufacturing while achieving precise fits for different opening sizes and maintaining consistent thermal insulation performance.
Solution Approach 2:
The flange structure serves multiple functions: it spaces the panes for insulation, provides attachment points for caps and hardware, and enables modular assembly. This multi-functionality reduces the number of separate components needed for custom sizing, thereby reducing manufacturing complexity.
3Reliability
If flanges are spaced apart to define a space, then thermal insulation is improved, but device complexity increases
Solution Approach 1:
The flanges serve multiple functions simultaneously: they structure the pane assembly, define the insulating space between panes, and provide mounting surfaces for caps and door hardware. This multi-functionality means the same structural elements that create thermal insulation also simplify assembly, offsetting the apparent complexity increase.
Solution Approach 2:
The invention merges the spacing function with the structural support function by making the flanges themselves the spacing elements. Instead of adding separate spacers, the flange geometry is designed to inherently maintain the optimal 0.5-2 inch spacing, thereby achieving thermal insulation without proportionally increasing structural complexity.
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 enables cost-effective, customizable, and energy-efficient doors with improved thermal insulation and safety, allowing for better product visibility and retrofitting capabilities, while reducing material usage and manufacturing costs.
Implementation Method 1
The second transparent pane is adhered to both flanges of the first pane
Implementation Method 2
thermally insulated doors for temperature controlled environments
Data Source
AI summary
A display case door includes a panel assembly with a first transparent pane and a second transparent pane. The first transparent pane includes flanges extending from each of a first edge and a second edge of a shaped portion. The second transparent pane is adhered to both flanges of the first pane to define a space between facing surfaces of the second transparent pane and the shaped portion of the first transparent pane and extending between openings at opposite ends of the panel assembly. Caps are coupled to the panel assembly and cover the openings at each of the first end and second end. The door further includes a hinge coupled to one of the flanges, a door handle secured to a surface of one of the flanges, and an edge guard coupled along an edge of at least one of the flanges.