French-Door Freezer Mullion for Full-Width Shelf Access
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Solution Overview
Problem
French doors on freezer compartments reduce the size of each compartment, limiting the extension of internal shelves and increasing complexity and cost when an articulating mullion is used, making it difficult to seal a full-width freezer compartment while allowing shelf deployment through both doors.
Innovation Solution
A housing with rotatable French doors and a mullion system that includes a fixed and movable portion, allowing the movable portion to pivot between sealed and unsealed positions to accommodate shelves fully extending across the appliance width, providing a sealing surface for the doors and enabling shelf deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vertical case is used between two freezer compartments to seal the French doors, then the sealing function is achieved, but the width of each freezer compartment is reduced and shelves cannot extend fully across the appliance
Solution Approach 1:
The mullion is designed with a movable portion that can pivot between a first position (when doors are closed) and a second position (when doors are open). This dynamic configuration allows the mullion to provide sealing when needed while clearing the path for shelves to extend fully when doors are open, resolving the contradiction between sealing function and compartment width utilization.
Solution Approach 2:
The mullion is divided into a fixed portion and a movable portion. The fixed portion provides structural support and sealing surface, while the movable portion can pivot to accommodate shelf movement. This segmentation allows the sealing function to be maintained while enabling full-width shelf extension.
2Adaptability or versatility
If an articulating mullion is attached to one of the freezer doors, then shelf deployment is enabled, but the price and complexity increase
Solution Approach 1:
The movable portion of the mullion is integrated directly into the door structure, merging the sealing function with the shelf-clearing function. This integration eliminates the need for separate articulating mechanisms on the door, reducing complexity while maintaining the ability to accommodate shelf deployment.
Solution Approach 2:
The movable portion of the mullion serves multiple functions: it provides a sealing surface when doors are closed and simultaneously clears the path for shelves to extend when doors are open. This multi-functionality reduces the need for additional components, thereby reducing overall device complexity.
Data Source
AI summary
An appliance having at least a freezer compartment. The appliance may include a pair of freezer doors accessing the freezer compartment. The freezer compartment may include one or more freezer shelves. A mullion may include a movable portion and a fixed portion for sealing the pair of freezer doors.