Adjustable mullion for a refrigerator appliance
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Solution Overview
Problem
French door refrigerators face issues with misalignment of movable mullions, leading to impaired sealing engagement and hindered door opening or closing, which can result in increased food spoilage and energy inefficiency.
Innovation Solution
A refrigerator appliance with an articulating mullion that includes a height adjustment element attached to the mullion hinge assembly, allowing for vertical adjustment of the mullion to ensure proper engagement with the cabinet groove, thereby maintaining effective sealing and reducing energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a movable mullion is attached to the door to allow access without obstruction, then accessibility is improved, but misalignment may occur leading to impaired sealing engagement
Solution Approach 1:
The mullion is designed to be movable rather than fixed, allowing it to rotate between a first position (when the door is open) and a second position (when the door is closed). This dynamic positioning ensures the mullion does not obstruct access while maintaining proper alignment for sealing engagement when the door is closed.
Solution Approach 2:
A groove is provided in the door that receives and guides the mullion, acting as an intermediary structure that ensures proper alignment and positioning of the mullion relative to the door and cabinet, preventing misalignment while maintaining mobility.
2Ease of operation
If the mullion is made movable to improve accessibility, then ease of operation is improved, but the mullion may become misaligned and inhibit door opening or closing
Solution Approach 1:
The groove structure acts as a guiding intermediary that passively maintains mullion alignment through its geometry, eliminating the need for active alignment mechanisms or complex control systems while ensuring the mullion remains properly positioned during door operation.
Solution Approach 2:
The mullion alignment is achieved through self-guiding features where the groove and mullion geometry automatically maintain proper relative positioning during door movement, without requiring external adjustment mechanisms or complex alignment systems.
3Loss of energy
If proper sealing engagement is maintained to reduce energy loss, then energy efficiency is improved, but the mullion may obstruct access when not properly positioned
Solution Approach 1:
The mullion transitions between positions dynamically: in the first position (door open) it recedes to avoid obstructing access, and in the second position (door closed) it advances to ensure proper sealing engagement, thus balancing accessibility and energy efficiency.
Data Source
AI summary
A refrigerator appliance may include a cabinet defining a chamber. The refrigerator appliance may include a door rotatably coupled to the cabinet to selectively access the chamber. The door may include a perimeter edge. The refrigerator appliance may include a mullion hinge assembly directly attached to the perimeter edge of the door. The refrigerator appliance may include an articulating mullion rotatably coupled to the door via the mullion hinge assembly to selectively seal the chamber. The refrigerator appliance may include a height adjustment element attached between the mullion hinge assembly and the articulating mullion to selectively adjust a vertical position of the articulating mullion.