Refrigerator Door Assembly Coupling to Prevent Panel Deformation
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Solution Overview
Problem
The manufacturing process of refrigerator doors often results in deformation, cracking, or debonding due to the forced insertion method of coupling members, leading to productivity issues and reduced product reliability.
Innovation Solution
A door assembly design featuring a connection member with a first and second connection unit, including locking units and grooves, that simplifies the coupling process between the front panel, rear panel, and door cap, preventing deformation and damage by guiding the assembly and ensuring secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If forced insertion method is used to couple door cap and front panel, then productivity is improved, but deformation and cracking occur
Solution Approach 1:
A coupling member is introduced as an intermediary component between the door cap and front panel. The coupling member includes a first coupling hole that receives a coupling protrusion from the door cap, and a second coupling hole that receives a coupling protrusion from the front panel. This intermediary structure enables gentle, guided coupling without forced insertion, preventing deformation and cracking while maintaining manufacturing efficiency.
2Loss of time
If forced insertion method is used to couple door cap and front panel, then assembly speed is improved, but debonding occurs among panels
Solution Approach 1:
The coupling member serves as a mediator that distributes coupling forces evenly across multiple panels. By receiving coupling protrusions from both the door cap and front panel through separate coupling holes, it prevents concentrated stress that causes debonding, while still enabling rapid assembly through simple protrusion-reception mechanics.
Solution Approach 2:
The coupling system is segmented into distinct coupling protrusions and coupling holes, with the coupling member having separate first and second coupling holes. This segmentation allows independent coupling of different panels (door cap and front panel) without interfering with each other, preventing debonding while maintaining assembly speed.
3Ease of manufacture
If simplified coupling structure is used, then manufacturing process is simplified, but coupling strength may be reduced
Solution Approach 1:
The coupling structure is segmented into multiple coupling protrusions and corresponding coupling holes distributed across the coupling member, door cap, and front panel. This segmentation provides multiple coupling points that collectively achieve strong bonding while maintaining manufacturing simplicity through standardized, repeatable coupling elements.
Solution Approach 2:
The coupling protrusions are designed with curved surfaces that fit into the coupling holes, creating point contact coupling. This curved geometry simplifies the manufacturing process compared to complex interlocking structures, while the precise fit and distribution of multiple coupling points ensure sufficient coupling strength.
Data Source
AI summary
A door assembly configured to open and close a storage compartment of a refrigerator. A refrigerator including a body; a storage compartment placed inside of the body and provided with an open front side, and a door assembly configured to open and close the open front side of the storage compartment. The door assembly includes a front panel forming a front side and opposite sides of the door assembly, a rear panel coupled to the opposite sides of the front panel in a rear side of the front panel, a door cap configured to cover an upper side or a lower side of the door assembly, and a connection member provided with a first connection unit coupled to the front panel and a second connection unit coupled to the door cap.