Refrigerator
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Solution Overview
Problem
Conventional refrigerators require opening the door to confirm the storage of food, leading to unnecessary leakage of cool air and increased power consumption, as the interior is not visible without opening the door.
Innovation Solution
A refrigerator with a transparent door section that can be selectively made transparent or opaque, equipped with a transparent display assembly that allows viewing the interior without opening the door, while maintaining insulation performance and preventing power loss through the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the door is made opaque to maintain insulation performance, then thermal insulation is improved, but the ability to view the interior without opening the door deteriorates
Solution Approach 1:
The door panel incorporates a transparent display assembly that can dynamically switch between transparent and opaque states. The display assembly includes a transparent substrate with liquid crystal or electrochromic elements that can change their optical properties based on electrical signals, allowing the door to adapt its transparency rather than being fixed in one state.
Solution Approach 2:
The display assembly utilizes materials that can change their optical transmission properties. When voltage is applied to the liquid crystal or electrochromic layers, they transition between transparent and opaque states, enabling the door to control visibility while maintaining insulation when needed.
2Loss of information
If a transparent display assembly is added to allow viewing the interior, then visibility is improved, but device complexity increases
Solution Approach 1:
The transparent display assembly serves multiple functions simultaneously: it acts as both a display screen for showing interior contents and as an insulating barrier when in opaque mode. The same structure that provides visibility also contributes to thermal insulation, reducing the need for separate components.
Solution Approach 2:
The door assembly combines multiple materials with different properties: transparent glass or plastic panels for visibility, liquid crystal or electrochromic layers for switching between transparent and opaque states, and insulating materials in the door core. This composite structure achieves both transparency and insulation functions within a single integrated assembly.
3Loss of energy
If the door thickness is increased to improve insulation, then thermal insulation is improved, but the overall refrigerator size increases
Solution Approach 1:
The door utilizes composite construction with multiple layers including insulating materials (foam or air gaps), transparent panels, and display assembly components. This layered composite structure achieves high insulation performance with relatively thin total thickness compared to conventional solid doors.
Solution Approach 2:
The door design incorporates air gaps or vacuum spaces between the transparent panels and insulating layers. These pneumatic insulation layers provide thermal resistance without adding significant thickness, as air or vacuum is an excellent thermal insulator when properly sealed.
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
Enables users to verify the storage of food without opening the door, reducing cool air leakage and power consumption, while maintaining the door's insulation performance and thickness.
Implementation Method 1
an inert gas is injected between the front panel and the light guide plate through an injection hole of the outer spacer to provide an insulation layer
Data Source
AI summary
A refrigerator includes a cabinet, a door defining an opening in the door, and a transparent display assembly that covers the opening and allows an inner space of the refrigerator to be visible. The transparent display assembly includes a front panel, a rear panel, an outer spacer configured to maintain a first distance between the front panel and the rear panel, a display disposed on a rear surface of the front panel, a light guide plate spaced apart from the display, and a first spacer configured to support the light guide plate and to maintain a second distance between the display and the light guide plate. The outer spacer defines a first injection hole configured to allow introduction of an inert gas to the outer spacer, and a first insulation layer configured to receive the inert gas between the front panel and the light guide plate.