Refrigerator having panel assembly covering opening of outer plate of door
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Solution Overview
Problem
Conventional refrigerators do not allow users to easily see inside the storage compartment while the door is closed, lacking features for selective transparency and efficient illumination, which can lead to difficulties in accessing contents and maintaining the internal environment.
Innovation Solution
A refrigerator design featuring a sub-door with a half-mirror panel assembly that can be made transparent by user operation, incorporating a knock detection system to activate lighting and ensure insulation, while minimizing gaps and facilitating wire management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a glass panel assembly is installed in the door to enable selective transparency, then users can see inside the refrigerator while the door is closed, but the risk of dew condensation on the glass surface increases
Solution Approach 1:
A heating element is integrated behind the glass panel assembly to pre-heat the glass surface before the user views the interior contents. This preliminary heating action prevents dew condensation from forming on the glass surface when the door is closed and the interior is illuminated, thereby maintaining both visibility and preventing condensation harm
2Reliability
If a knock detection device is installed to enable selective transparency, then operation reliability is enhanced, but the complexity of the door assembly increases
Solution Approach 1:
The knock detection device is integrated into the existing door assembly structure, combining the detection function with the panel assembly mounting structure. This merging approach enhances operation detection reliability while minimizing the increase in overall door assembly complexity by reusing existing structural elements
Solution Approach 2:
A knock detection device acts as an intermediary between the user's knocking action and the lighting/ transparency control system. The device detects knock vibrations and triggers the lighting unit and panel assembly to become transparent, providing reliable operation detection while maintaining a clean separation of functions that manages complexity
3Ease of operation
If the panel assembly is made transparent to view interior contents, then accessibility to contents is improved, but insulation performance of the door deteriorates
Solution Approach 1:
The lighting unit is activated in advance when the knock detection device senses a knock, illuminating the interior contents before the panel assembly becomes transparent. This preliminary lighting action allows the user to view contents without needing to open the door, thereby maintaining insulation performance while improving accessibility
Solution Approach 2:
The panel assembly changes its optical properties from opaque to transparent in response to the knock detection signal. This dynamic optical change allows the door to maintain insulation performance in normal conditions while enabling content viewing when needed, effectively resolving the contradiction between accessibility and thermal performance
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 visually access the interior without opening the door, maintaining insulation and reducing dew condensation, with improved recognition and operation reliability, and easy maintenance of the detection device.
Implementation Method 1
a panel assembly provided at the sub-door, and having a half-mirror structure which allows to selectively see through an inside of the opening part
Implementation Method 2
a knock detection device disposed at a rear surface of the panel assembly, and configured to detect a user' knocking operation on the panel assembly
Data Source
AI summary
Provided is a refrigerator. The refrigerator is characterized by enabling at least a part of a refrigerator door to be selectively transparent by a user's operation, such that the user sees through an inside of the refrigerator while the refrigerator door is closed.