Knock-Activated See-Through Refrigerator Door for Cold Air Retention
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Solution Overview
Problem
Conventional refrigerators lose cold air when the door is opened, making it inconvenient for users to find items and increasing energy consumption, as the door is typically opaque and requires full opening to access the interior.
Innovation Solution
A refrigerator with a door that can be selectively converted into a see-through mode using a lighting device activated by a user's tap input, allowing the interior to be visible without opening the door, utilizing a sensor to detect sound waves and maintain thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the door is made opaque to maintain thermal insulation, then energy loss is reduced, but the user cannot see the interior without opening the door
Solution Approach 1:
The door panel assembly is designed to be dynamically switchable between opaque and transparent states. The lighting device can be activated to illuminate the interior, making the door transparent when needed, while remaining opaque during normal operation to maintain thermal insulation. This dynamic adaptability resolves the contradiction by allowing the door to change its optical properties based on user needs.
Solution Approach 2:
The door panel assembly changes its optical transparency through controlled illumination. When the lighting device is activated, the panel becomes transparent allowing visibility into the interior; when deactivated, it remains opaque. This change in optical state enables the door to provide visibility on demand without compromising thermal insulation during normal operation.
2Loss of information
If the door is opened to see the interior, then the user can locate items, but cold air is lost and energy consumption increases
Solution Approach 1:
The door panel assembly is designed to be dynamically switchable between opaque and transparent states. The lighting device can be activated to illuminate the interior, making the door transparent when needed, while remaining opaque during normal operation to maintain thermal insulation. This dynamic adaptability resolves the contradiction by allowing the door to change its optical properties based on user needs.
Solution Approach 2:
The lighting device acts as an intermediary that enables visibility through the door without requiring the door to be opened. By illuminating the interior, the lighting device allows users to see stored items while the door remains closed, preventing cold air loss and maintaining energy efficiency.
3Ease of operation
If a touch panel is used for input, then user interface functionality is improved, but device complexity and cost increase
Solution Approach 1:
The sensor detects sound waves generated by user input (such as knocking or tapping on the door) and provides feedback to the controller. When the sound wave characteristics match predefined criteria, the controller activates the lighting device. This feedback mechanism enables a simple acoustic input interface without requiring complex touch panel hardware.
Solution Approach 2:
The patent replaces the mechanical touch panel system with an acoustic sensing system. Instead of using a complex electronic touch panel, the sensor detects sound waves from user actions, and the controller processes this acoustic information to control the lighting device. This substitution simplifies the device structure while maintaining user interface functionality.
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 cold air loss, enhances user convenience by allowing interior visibility without opening the door, and simplifies the structure by eliminating expensive touch panels while maintaining thermal insulation and aesthetic appeal.
Implementation Method 1
a lighting device for illuminating an interior of the storage compartment
Implementation Method 2
a sensor for detecting sound waves, which are generated by the application of a knock input to the door and are transmitted through the front panel
Implementation Method 3
a panel assembly including a front panel disposed on the front surface... making the storage compartment visible from outside the door through the opening
Data Source
AI summary
A refrigerator equipped with a door that becomes transparent as necessary to make the interior thereof visible is disclosed. The refrigerator includes a cabinet having a storage compartment defined therein, a lighting device for illuminating the interior of the storage compartment, a door, which is hingedly coupled to the cabinet to open and close the storage compartment, and has an opening and a panel assembly including a front panel disposed on the front surface thereof, a sensor for detecting sound waves, which are generated by a knock input applied to the door and are transmitted through the front panel, and a controller for controlling the lighting device to allow light to be transmitted through the panel assembly, thus making the storage compartment visible from outside the door through the opening when a predetermined knock input is detected.