Transparent Refrigerator Door With Variable Opacity and Proximity Lighting
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Solution Overview
Problem
Conventional refrigerators have opaque doors, making it difficult for users to see the contents of the storage chamber before opening, leading to cold air loss and increased power consumption due to frequent door openings and closings.
Innovation Solution
A refrigerator with a partially transparent door system, featuring a variable transparency film and lighting device that automatically activates when a user approaches, allowing the inner space to be visible without opening the door, and an insulation panel to maintain temperature efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the door is made opaque, then the exterior appearance is clean and neat, but the user cannot see the storage chamber contents before opening the door
Solution Approach 1:
The door incorporates a variable transparency film that can dynamically change between opaque and transparent states based on user proximity or input, allowing the door to adapt its transparency property rather than being fixed. This resolves the contradiction by making the door opaque during normal operation to prevent cold air loss, and transparent on demand to allow visibility of contents.
Solution Approach 2:
The transparency parameter of the door is changed from a fixed state to a variable state through the use of electrochromic or PDLC film technology. By applying electrical voltage, the film transitions between transparent and opaque states, enabling the door to provide visibility when needed while maintaining opacity to prevent cold air loss during normal operation.
2Loss of information
If the door is opened frequently to check contents, then the user can see what is stored, but cold air is leaked and temperature rises
Solution Approach 1:
The dynamic transparency control system allows users to view contents by changing the door's optical property rather than physically opening it. This eliminates the energy loss associated with frequent door openings while maintaining the ability to access information about stored contents on demand.
Solution Approach 2:
The variable transparency film acts as an intermediary that provides visual access to the storage chamber contents without requiring physical access through door opening. This mediator enables information transfer (visual inspection) while maintaining the physical barrier that prevents cold air loss and energy waste.
3Loss of information
If a transparent door is used, then the user can see the storage chamber, but the exterior appearance becomes less clean and neat
Solution Approach 1:
The door's optical appearance is made dynamic, switching between transparent and opaque states. During normal operation, the door maintains an opaque appearance that is aesthetically pleasing and matches the refrigerator's design. When visibility is needed, the door becomes transparent temporarily, resolving the appearance conflict by making transparency situational rather than permanent.
Solution Approach 2:
The variable transparency film is applied to specific portions of the door rather than the entire door being permanently transparent or opaque. This allows selective transparency in specific areas or at specific times, enabling the door to maintain its aesthetic quality while providing visibility functionality where and when needed.
4Illumination intensity
If lighting is always on to illuminate storage chamber, then contents are always visible, but energy consumption increases
Solution Approach 1:
The lighting system operates periodically rather than continuously, turning on when proximity sensors detect user presence or when the transparency film is activated, and turning off when not needed. This periodic operation provides necessary illumination for visibility while dramatically reducing overall energy consumption compared to continuous lighting.
Solution Approach 2:
Proximity sensors and transparency control systems provide feedback about user presence and door state, which automatically controls lighting activation. This feedback-based control ensures lighting is provided only when and where needed, optimizing the balance between illumination quality and energy consumption.
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 transparent door system allows users to view the storage chamber contents without opening the door, reducing cold air loss and power consumption by maintaining a consistent temperature and providing a clean, neat exterior appearance.
Implementation Method 1
a variable transparency film attached to a back surface of the evaporation treatment unit provided in the front panel to get transparent when the power is supplied
Implementation Method 2
an evaporation treatment unit evaporated on an overall back surface of the front panel to transmit lights partially
Implementation Method 3
a proximity sensor provided in the second door to sense a user's approaching
Data Source
AI summary
There is disclosed a refrigerator; a lighting device provided in the storage chamber, a first door rotatably coupled to the case to open and close the storage chamber, an auxiliary storage chamber provided in the first door, a second door, a front panel formed of a transparent material, an evaporation treatment unit evaporated on an overall back surface of the front panel to transmit lights partially, a variable transparency film attached to a back surface of the evaporation treatment unit provided in the front panel to get transparent when the power is supplied, a frame unit with an opening having a corresponding size to an opening provided in the first door, an insulation panel distant from the front panel, a power supply unit for supplying an electric power to the variable transparency film and the lighting device, a proximity sensor provided in the second door to sense a user's approaching.