Refrigerator
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Solution Overview
Problem
Traditional refrigerators with composite doors face issues such as frequent opening of the secondary door, leading to cold loss and condensation on the inner walls, which hinders the development of the composite door technology.
Innovation Solution
The refrigerator features a secondary door with a state-adjustable door panel that can change transparency, allowing users to view the internal structure of the second compartment without opening the door, thereby reducing cold loss and condensation. Additionally, the primary door is designed with a condensation removing air duct and holes to efficiently remove condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the secondary door is made transparent to allow viewing of the second compartment, then the user can see storage objects without opening the door, but the transparency control mechanism increases device complexity
Solution Approach 1:
The door panel incorporates a liquid crystal layer that can dynamically change its transparency state between transparent and opaque based on control signals, allowing the optical properties of the panel to be adjusted dynamically rather than being fixed
Solution Approach 2:
The liquid crystal layer changes its optical parameters (transparency) in response to electrical signals, transforming the panel from a static transparent or opaque state to a controllable variable state, thereby reducing door openings while managing complexity through electronic control
2Loss of energy
If the secondary door remains closed to reduce cold loss, then energy efficiency improves, but condensation accumulates on the inner wall of the second compartment
Solution Approach 1:
The refrigerator control system periodically switches the secondary door between closed and slightly open states, allowing brief ventilation intervals to prevent condensation buildup while maintaining overall closure to minimize cold loss
Solution Approach 2:
The liquid crystal transparency control operates continuously to monitor and adjust visibility based on door opening detection, maintaining optimal transparency state without requiring physical door openings, thereby continuously preventing both cold loss and condensation
3Loss of information
If the liquid crystal layer is powered on to maintain transparency, then the second compartment remains visible, but energy consumption increases
Solution Approach 1:
The liquid crystal layer is powered on only during brief periods when door opening is detected or when the system needs to display storage contents, then switched to a powered-off opaque state to conserve energy, creating periodic cycles of transparency and opacity
Solution Approach 2:
The control system uses feedback from door opening detection and user interaction to intelligently control the liquid crystal layer power state, activating transparency only when necessary based on actual usage patterns rather than continuous operation
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 effectively reduces the frequency of opening the secondary door, minimizing cold loss and condensation, while enhancing the product's high-tech element and user experience.
Implementation Method 1
the liquid crystal layer is configured to be in a transparent state when in a powered-on state and in a non-transparent state when in a powered-off state
Implementation Method 2
air in the first compartment enters the condensation removing air duct, so as to allow part of the air flow to flow to the front surface of the rear wall through the condensation removing holes to remove surface condensation of the rear wall
Data Source
AI summary
A refrigerator, comprising: a refrigerator body having an open front side to define a first compartment; a primary door mounted to the refrigerator body and used for opening/closing the first compartment, the primary door defining a second compartment having an open front side; and a secondary door mounted to the primary door and used for opening/closing the second compartment, the secondary door comprising a state adjustable door panel, and the state adjustable door panel being configured to controllably change transparency such that the visibility of an internal structure of the second compartment is adjustable. According to the refrigerator of the present invention, the frequency of opening the secondary door can be effectively reduced, the product high-tech element is added, and the user experience is improved.