refrigerator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional refrigerators have opaque doors, leading to energy loss and user inconvenience due to the need to open the door to view the contents, which increases energy consumption and time spent finding items.
Innovation Solution
A refrigerator with a selectively variable see-through door that can be changed to transparent mode via user input, using a knock sensor module and microphone module to sense user input and control illumination, allowing the interior to be viewed without opening the door, while maintaining heat insulation and aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the door is made opaque for heat insulation, then energy loss is reduced, but the user cannot view the interior contents without opening the door
Solution Approach 1:
The door's transparency is made dynamic rather than static. The door can switch between opaque and transparent states based on user needs, allowing the system to adapt to different operational conditions. This resolves the contradiction by having the door be opaque during normal operation to prevent energy loss, and transparent when the user needs to view contents.
Solution Approach 2:
The optical property (transparency) of the door is changed as a controllable parameter. By altering the transparency parameter of the door material or structure, the system can switch between viewing mode and energy conservation mode, simultaneously addressing both the need for visibility and energy efficiency.
2Loss of information
If the door is opened to view contents, then the user can see what is stored, but energy loss increases
Solution Approach 1:
Instead of mechanically opening the door to view contents, the system dynamically changes the door's transparency state. This allows users to view interior contents while the door remains closed, preventing cool air loss while maintaining visibility of stored items.
Solution Approach 2:
An illumination device acts as an intermediary between the user and the interior contents. By providing internal lighting, the system enables users to view contents through the transparent door without needing to open it, thus mediating the interaction in a way that preserves energy while providing information.
3Loss of information
If a transparent door is used for visibility, then the user can view contents without opening the door, but heat insulation performance deteriorates
Solution Approach 1:
The door's transparency is dynamically controlled rather than permanently fixed. The door maintains an opaque state during normal operation to ensure heat insulation, and only becomes transparent when users need to view contents, thus balancing visibility needs with thermal performance.
Solution Approach 2:
The transparent state is activated periodically or on-demand rather than continuously. The door switches to transparent mode only when needed for viewing, and returns to opaque mode afterward, minimizing the time during which heat insulation is compromised while still providing necessary visibility.
4Ease of operation
If expensive touch panels are used for user input, then user interface functionality is improved, but device complexity and cost increase
Solution Approach 1:
The complex electronic touch panel system is replaced with a simpler acoustic sensing system. By using a microphone to detect knock sounds, the system achieves user input functionality without the complexity and cost of touch panels, while still providing ease of operation through intuitive knocking gestures.
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 reduces energy consumption by minimizing door opening time, enhances user convenience by allowing content visibility without opening the door, and simplifies the structure by eliminating the need for expensive touch panels, while maintaining heat insulation and aesthetic appeal.
Implementation Method 1
a microphone module for sensing a knock input as a sound wave
Implementation Method 2
operating the illumination device such that light is transmitted through the panel assembly
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed is a refrigerator, more particularly a refrigerator including a door that is variably transparent so that the interior of the refrigerator is visible therethrough. The refrigerator includes a cabinet having a storage compartment therein, an illumination device for illuminating the interior of the storage compartment, a door hinged to the cabinet for opening and closing the storage compartment, the door having an opening formed therein and a panel assembly having a front panel provided at the front thereof, a knock sensor module including a microphone module for sensing a sound wave generated by knock vibration applied to the door and a module microcomputer for determining whether the knock vibration is a predetermined knock based on the sensed sound wave, and a controller provided separately from the module microcomputer for receiving a knock-on signal from the module microcomputer and operating the illumination device such that light is transmitted through the panel assembly, whereby the interior of the storage compartment can be seen from outside the door.