Refrigerator Door Hinge Damping for Constant-Speed Closing
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Solution Overview
Problem
Refrigerator doors with increased weight due to additional features or stored food become difficult to open and close, leading to noise and potential item displacement due to rapid closure and impact.
Innovation Solution
A damping device is integrated into the refrigerator door hinge system, utilizing oil resistance to provide adjustable damping forces that slow down the door's closure, ensuring smooth operation and reducing noise and impact by decelerating the door across varying weights and closing speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the door weight is increased to provide additional features or store more food, then the storage capacity and functionality are improved, but the effort required to open and close the door increases and the closing speed becomes excessively fast
Solution Approach 1:
The damping device changes the damping parameter dynamically based on the door's closing angle. At different angles, different damping forces are applied to control the closing speed, ensuring the door closes at a constant, safe speed regardless of its weight or the closing force applied by the user.
2Quantity of substance
If the door weight is increased to provide additional features or store more food, then the storage capacity is improved, but noise and impact from rapid closure occur
Solution Approach 1:
The damping parameter is adjusted according to the door's closing angle to maintain a constant closing speed. This prevents rapid closure that would generate noise and impact, while still allowing the door to support heavy loads or additional features.
3Speed
If a damping device is added to control door closing speed, then the closing speed control is improved, but the device complexity increases
Solution Approach 1:
The damping device is integrated with the hinge system, merging the damping function into the existing hinge structure. This reduces the need for separate components and simplifies the overall system while still achieving constant speed closing control.
Solution Approach 2:
The damping device provides dynamic damping force that changes with the door's closing angle. This dynamic adjustment allows effective speed control without requiring complex mechanical structures, as the damping parameter adapts automatically to the door's position.
4Speed
If the damping force is increased to slow down the door, then the closing speed control is improved, but the reaction force when opening the door increases
Solution Approach 1:
The damping parameter is adjusted based on the door's angle and direction of movement. When opening the door, the damping force is reduced or eliminated, minimizing reaction force. When closing, the damping parameter increases to provide the necessary slowing effect, achieving constant speed control without excessive opening resistance.
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 damping device ensures the door closes at a constant speed, reducing noise and impact, and maintains smooth operation by adjusting damping forces based on the door's angle and weight, enhancing user convenience and appliance reliability.
Implementation Method 1
a damping device which is provided on the door and provides a damping force through oil resistance
Data Source
AI summary
A refrigerator includes a cabinet which has a storage space; a door which opens and closes the storage space; a hinge which rotatably connects the cabinet and the door; and a damping device which is provided on the door and provides a damping force through oil resistance, in which the hinge is in contact with the damping device while the door is rotated in the closing direction and causes the stroke of the damping device to increase to slow down the door.