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 visually inspect the interior while the door is closed, lacking transparency and efficient lighting solutions, which can lead to difficulties in accessing stored items and maintaining the contents.
Innovation Solution
A refrigerator design featuring a half-glass door panel assembly with a knock detection system that illuminates the interior upon user request, providing selective transparency and improved visibility through a half-mirror panel that can be made transparent or opaque, along with a door lighting unit for uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a glass panel assembly is used to enable transparency, then visibility through the door is improved, but dew condensation on the glass surface occurs
Solution Approach 1:
A heating wire is introduced as an intermediary element between the glass panel and the cold environment. The heating wire prevents dew condensation by creating a thermal barrier that maintains the glass surface temperature above the dew point, while the glass panel maintains its transparency function for visibility.
Solution Approach 2:
The temperature parameter of the glass panel surface is actively changed and controlled through the heating wire. By adjusting the heating intensity, the glass surface temperature is maintained in a range that prevents condensation while preserving optical transparency for viewing the refrigerator interior.
2Reliability
If a panel assembly with detection device is installed on the door, then operation recognition is improved, but the detection device exposure and assembly complexity increase
Solution Approach 1:
The detection device is merged with the panel assembly structure, where the knock detection device is installed within the panel assembly itself rather than as a separate external component. This integration reduces the number of separate parts and simplifies the overall assembly while maintaining reliable operation detection.
Solution Approach 2:
The panel assembly serves multiple functions: it provides structural support for the door, enables transparency through the glass panel, and houses the knock detection device for operation recognition. By combining these functions into a single integrated assembly, the overall device complexity is reduced.
3Loss of information
If the door is made transparent with glass material, then visibility is improved, but insulation performance deteriorates
Solution Approach 1:
Multiple glass panels are nested within each other, creating a multi-layered structure. This nested configuration traps air or vacuum between the layers, providing thermal insulation while maintaining transparency. The inner glass panel provides visibility, while the outer panels and intervening space provide insulation barriers.
Solution Approach 2:
The door assembly uses a composite structure combining multiple glass panels with insulating materials (such as vacuum space or air gaps) between them. This composite construction achieves both optical transparency for visibility and thermal insulation by leveraging the different properties of glass and the insulating medium between the panels.
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 see through the refrigerator door while closed, enhancing recognition and reliability of operations, preventing dew condensation, and ensuring easy maintenance and insulation within the door, while guiding wires and utilizing internal space effectively.
Implementation Method 1
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
Implementation Method 2
a door lighting unit provided above the panel assembly, turned on or off by the knock detection device to selectively illuminate an internal space of the opening part
Implementation Method 3
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
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.