Adhesive-Based Corner Gap Sealing for Insulated Appliance Door Panels
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Solution Overview
Problem
Existing cabinet structures for appliances face challenges in effectively sealing gaps at the corners of door panels, which can lead to insulation leakage and reduced efficiency.
Innovation Solution
A method involving folding metallic sheets to create side edges with defined gaps, securing interior blocks to form adhesive cavities, and applying a fast-curing adhesive within these cavities to create a solid sealing member that hermetically seals the gaps, with removable exterior blocks to minimize seam appearance and facilitate easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional welding or fastening methods are used to seal gaps at corner joints, then sealing reliability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces traditional mechanical sealing methods (welding, fastening) with a chemical bonding system. Adhesive is applied to the corner joints and cured to form a sealing member, substituting complex mechanical operations with a simpler chemical process that achieves equivalent or superior sealing reliability without requiring specialized equipment or skilled labor
Solution Approach 2:
The patent applies adhesive to the corner joints before final assembly of the cabinet body. By performing the bonding action in advance during the assembly process rather than requiring post-assembly welding or fastening, the method simplifies manufacturing while ensuring proper sealing from the outset
2Ease of manufacture
If adhesive is applied directly to gap areas without containment, then manufacturing simplicity is improved, but manufacturing precision deteriorates due to adhesive leakage
Solution Approach 1:
The patent introduces a carrier as an intermediary component between the adhesive and the corner joint. The carrier holds the adhesive in a controlled manner during application and positioning, preventing leakage while allowing easy placement. After curing, the carrier is removed, leaving a precise adhesive seal at the joint without requiring complex application equipment
Solution Approach 2:
The patent divides the adhesive application process into discrete steps: applying adhesive to the carrier, positioning the carrier at the corner joint, curing, and removing the carrier. This segmentation allows each step to be performed simply while maintaining overall precision, as the carrier acts as a temporary containment structure that ensures accurate adhesive placement
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
This method provides a reliable, efficient, and aesthetically pleasing sealing solution that maintains insulation integrity and allows for the formation of vacuum-insulated structures without the need for welding or additional fasteners, enhancing the performance and longevity of appliance door panels.
Implementation Method 1
The adhesive is cured to form a solid sealing member within each adhesive cavity that adheres the respective interior block to the interior surface of the structural outer panel
Data Source
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AI summary
A method of forming an insulated door panel includes folding side flanges of a metallic sheet to define side edges of a structural outer panel that extend from a front panel. A gap is defined between each set of adjacent side edges. Interior blocks are secured to an interior of the structural outer panel proximate each gap to define adhesive cavities. Exterior blocks are positioned at an exterior surface of the structural outer panel at each gap to further define the adhesive cavities. An adhesive is disposed within each adhesive cavity and is contained therein by the interior and exterior blocks. The adhesive is cured to a solid sealing member that adheres the interior blocks to the interior surface of the structural outer panel to form a sealed structural panel. The exterior blocks are removed and each solid sealing member defines a hermetic seal at each gap.