Refrigerator with glass door
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Solution Overview
Problem
Conventional refrigeration appliances with glass doors are poorly insulated, making them inefficient for household use, as they allow excessive heat loss, which is not a concern in large commercial settings but is costly to compensate for in domestic settings.
Innovation Solution
A refrigeration appliance with a glass door that incorporates a frame assembly with preformed insulating elements and a lower support assembly to maintain energy efficiency while allowing users to view the contents without opening the door, featuring a window with a non-transparent lower portion to obstruct viewing of storage bins when closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a glass door is used to allow viewing of contents, then visibility of contents is improved, but thermal insulation performance deteriorates
Solution Approach 1:
The door is divided into multiple sections: transparent upper portion for viewing, opaque lower portion for insulation, and insulated frame assembly. This segmentation allows each portion to serve its specific function while collectively resolving the contradiction between visibility and thermal insulation.
Solution Approach 2:
Different portions of the door have different optical and thermal properties. The upper portion is transparent for viewing, the lower portion is opaque for insulation, and the frame assembly provides enhanced insulation. This local differentiation resolves the contradiction by optimizing each region for its specific purpose.
2Loss of information
If a glass door with large opening is used for viewing, then ability to view contents is improved, but insulation performance deteriorates
Solution Approach 1:
The door opening is segmented into a transparent upper portion and an opaque lower portion, with the frame assembly providing additional insulation around the opening. This segmentation allows viewing capability while minimizing the impact on overall insulation performance.
3Ease of manufacture
If conventional glass door construction is used, then ease of manufacture is improved, but energy efficiency deteriorates
Solution Approach 1:
The door assembly uses composite construction combining glass panels (transparent and opaque portions) with insulated frame members. This composite approach maintains manufacturing feasibility while significantly improving energy efficiency compared to conventional single-material glass doors.
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 provides energy-efficient insulation while enabling users to view the contents of the appliance without opening the door, addressing the inefficiencies of conventional glass-door refrigerators by maintaining temperature and reducing energy costs in household use.
Implementation Method 1
A door is pivotably coupled to the cabinet and is movable between a closed position for closing the storage compartment and an open position for allowing access to the storage compartment. The door includes an inner surface, an outer surface and an opening extending between the inner surface and the outer surface. A window covers the opening.
Implementation Method 2
The window includes a lower portion that is non-transparent. A storage bin is on a lower portion of the door, wherein the lower portion of the window obstructs viewing of the storage bin through the window when the door is in the closed position
Data Source
AI summary
A refrigeration appliance includes a cabinet that defines a storage compartment. A door is pivotably coupled to the cabinet and is movable between a closed position for closing the storage compartment and an open position for allowing access to the storage compartment. The door includes an inner surface and an outer surface. An opening extends between the inner surface and the outer surface. A window is disposed within the opening. The window optionally includes a lower portion that is non-transparent. A storage bin is attachable to a lower portion of the inner surface of the door wherein the non-transparent portion of the window obstructs viewing of the storage bin when the door is in the closed position.